./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.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 38de1f601deff70f21f1ef1f0123eb0d7f517b820846e07815605162625b0305 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 18:02:42,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 18:02:42,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 18:02:42,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 18:02:42,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 18:02:42,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 18:02:42,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 18:02:42,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 18:02:42,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 18:02:42,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 18:02:42,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 18:02:42,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 18:02:42,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 18:02:42,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 18:02:42,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 18:02:42,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 18:02:42,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 18:02:42,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 18:02:42,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 18:02:42,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 18:02:42,763 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 18:02:42,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 18:02:42,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 18:02:42,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 18:02:42,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 18:02:42,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 18:02:42,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 18:02:42,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 18:02:42,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 18:02:42,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 18:02:42,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 18:02:42,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 18:02:42,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 18:02:42,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 18:02:42,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 18:02:42,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 18:02:42,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 18:02:42,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 18:02:42,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 18:02:42,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 18:02:42,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 18:02:42,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 18:02:42,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 18:02:42,808 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 18:02:42,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 18:02:42,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 18:02:42,809 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 18:02:42,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 18:02:42,810 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 18:02:42,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 18:02:42,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 18:02:42,811 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 18:02:42,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 18:02:42,812 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 18:02:42,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 18:02:42,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 18:02:42,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 18:02:42,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 18:02:42,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 18:02:42,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 18:02:42,813 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 18:02:42,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 18:02:42,814 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 18:02:42,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 18:02:42,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 18:02:42,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 18:02:42,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 18:02:42,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 18:02:42,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 18:02:42,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 18:02:42,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 18:02:42,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 18:02:42,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 18:02:42,816 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 18:02:42,816 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 18:02:42,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 18:02:42,817 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38de1f601deff70f21f1ef1f0123eb0d7f517b820846e07815605162625b0305 [2022-07-19 18:02:43,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 18:02:43,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 18:02:43,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 18:02:43,088 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 18:02:43,088 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 18:02:43,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-07-19 18:02:43,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8ae0562/f41080be64374ad5b175005c1ed2edcc/FLAG3caa037e2 [2022-07-19 18:02:43,785 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 18:02:43,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-07-19 18:02:43,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8ae0562/f41080be64374ad5b175005c1ed2edcc/FLAG3caa037e2 [2022-07-19 18:02:44,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8ae0562/f41080be64374ad5b175005c1ed2edcc [2022-07-19 18:02:44,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 18:02:44,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 18:02:44,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 18:02:44,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 18:02:44,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 18:02:44,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 06:02:44" (1/1) ... [2022-07-19 18:02:44,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@777f3fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:44, skipping insertion in model container [2022-07-19 18:02:44,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 06:02:44" (1/1) ... [2022-07-19 18:02:44,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 18:02:44,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 18:02:44,832 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30493,30506] [2022-07-19 18:02:44,877 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33882,33895] [2022-07-19 18:02:45,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 18:02:45,100 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 18:02:45,321 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[30493,30506] [2022-07-19 18:02:45,356 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[33882,33895] [2022-07-19 18:02:45,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 18:02:45,499 INFO L208 MainTranslator]: Completed translation [2022-07-19 18:02:45,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45 WrapperNode [2022-07-19 18:02:45,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 18:02:45,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 18:02:45,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 18:02:45,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 18:02:45,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45" (1/1) ... [2022-07-19 18:02:45,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45" (1/1) ... [2022-07-19 18:02:45,640 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3812 [2022-07-19 18:02:45,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 18:02:45,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 18:02:45,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 18:02:45,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 18:02:45,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45" (1/1) ... [2022-07-19 18:02:45,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45" (1/1) ... [2022-07-19 18:02:45,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45" (1/1) ... [2022-07-19 18:02:45,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45" (1/1) ... [2022-07-19 18:02:45,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45" (1/1) ... [2022-07-19 18:02:45,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45" (1/1) ... [2022-07-19 18:02:45,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45" (1/1) ... [2022-07-19 18:02:45,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 18:02:45,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 18:02:45,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 18:02:45,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 18:02:45,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45" (1/1) ... [2022-07-19 18:02:45,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 18:02:45,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 18:02:45,797 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) [2022-07-19 18:02:45,815 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 [2022-07-19 18:02:45,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 18:02:45,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 18:02:45,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 18:02:45,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 18:02:46,049 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 18:02:46,051 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 18:02:48,024 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 18:02:48,048 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 18:02:48,049 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 18:02:48,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 06:02:48 BoogieIcfgContainer [2022-07-19 18:02:48,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 18:02:48,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 18:02:48,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 18:02:48,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 18:02:48,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 06:02:44" (1/3) ... [2022-07-19 18:02:48,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e08618c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 06:02:48, skipping insertion in model container [2022-07-19 18:02:48,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:02:45" (2/3) ... [2022-07-19 18:02:48,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e08618c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 06:02:48, skipping insertion in model container [2022-07-19 18:02:48,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 06:02:48" (3/3) ... [2022-07-19 18:02:48,063 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-07-19 18:02:48,075 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 18:02:48,076 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 18:02:48,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 18:02:48,150 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@3e72f20c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@8ece49e [2022-07-19 18:02:48,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 18:02:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 1121 states, 1118 states have (on average 1.7361359570661896) internal successors, (1941), 1120 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-19 18:02:48,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:02:48,195 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] [2022-07-19 18:02:48,196 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:02:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:02:48,203 INFO L85 PathProgramCache]: Analyzing trace with hash 456360996, now seen corresponding path program 1 times [2022-07-19 18:02:48,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:02:48,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673772441] [2022-07-19 18:02:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:02:48,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:02:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:02:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:02:48,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:02:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673772441] [2022-07-19 18:02:48,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673772441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:02:48,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:02:48,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 18:02:48,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793376530] [2022-07-19 18:02:48,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:02:48,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 18:02:48,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:02:48,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 18:02:48,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 18:02:48,613 INFO L87 Difference]: Start difference. First operand has 1121 states, 1118 states have (on average 1.7361359570661896) internal successors, (1941), 1120 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:02:48,898 INFO L93 Difference]: Finished difference Result 2057 states and 3534 transitions. [2022-07-19 18:02:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 18:02:48,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2022-07-19 18:02:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:02:48,923 INFO L225 Difference]: With dead ends: 2057 [2022-07-19 18:02:48,923 INFO L226 Difference]: Without dead ends: 1118 [2022-07-19 18:02:48,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:02:48,934 INFO L413 NwaCegarLoop]: 1937 mSDtfsCounter, 1593 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 4180 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 18:02:48,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1593 Valid, 4180 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 18:02:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-07-19 18:02:49,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1118. [2022-07-19 18:02:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1116 states have (on average 1.6926523297491038) internal successors, (1889), 1117 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1889 transitions. [2022-07-19 18:02:49,029 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1889 transitions. Word has length 150 [2022-07-19 18:02:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:02:49,029 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1889 transitions. [2022-07-19 18:02:49,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:49,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1889 transitions. [2022-07-19 18:02:49,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-19 18:02:49,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:02:49,035 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:02:49,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 18:02:49,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:02:49,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:02:49,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1166050469, now seen corresponding path program 1 times [2022-07-19 18:02:49,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:02:49,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172962187] [2022-07-19 18:02:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:02:49,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:02:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:02:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:02:49,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:02:49,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172962187] [2022-07-19 18:02:49,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172962187] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:02:49,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:02:49,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:02:49,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74424389] [2022-07-19 18:02:49,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:02:49,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:02:49,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:02:49,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:02:49,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:49,250 INFO L87 Difference]: Start difference. First operand 1118 states and 1889 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:49,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:02:49,607 INFO L93 Difference]: Finished difference Result 2859 states and 4838 transitions. [2022-07-19 18:02:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:02:49,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 191 [2022-07-19 18:02:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:02:49,620 INFO L225 Difference]: With dead ends: 2859 [2022-07-19 18:02:49,620 INFO L226 Difference]: Without dead ends: 1949 [2022-07-19 18:02:49,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:49,625 INFO L413 NwaCegarLoop]: 3002 mSDtfsCounter, 1382 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 4723 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 18:02:49,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1382 Valid, 4723 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 18:02:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2022-07-19 18:02:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1939. [2022-07-19 18:02:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1937 states have (on average 1.6721734641197727) internal successors, (3239), 1938 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 3239 transitions. [2022-07-19 18:02:49,732 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 3239 transitions. Word has length 191 [2022-07-19 18:02:49,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:02:49,735 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 3239 transitions. [2022-07-19 18:02:49,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 3239 transitions. [2022-07-19 18:02:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-19 18:02:49,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:02:49,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:02:49,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 18:02:49,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:02:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:02:49,750 INFO L85 PathProgramCache]: Analyzing trace with hash 955874818, now seen corresponding path program 1 times [2022-07-19 18:02:49,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:02:49,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981102840] [2022-07-19 18:02:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:02:49,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:02:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:02:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:02:49,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:02:49,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981102840] [2022-07-19 18:02:49,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981102840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:02:49,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:02:49,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:02:49,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570738669] [2022-07-19 18:02:49,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:02:49,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:02:49,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:02:49,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:02:49,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:49,894 INFO L87 Difference]: Start difference. First operand 1939 states and 3239 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 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) [2022-07-19 18:02:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:02:50,064 INFO L93 Difference]: Finished difference Result 3238 states and 5452 transitions. [2022-07-19 18:02:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:02:50,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 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 196 [2022-07-19 18:02:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:02:50,075 INFO L225 Difference]: With dead ends: 3238 [2022-07-19 18:02:50,076 INFO L226 Difference]: Without dead ends: 2328 [2022-07-19 18:02:50,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:50,080 INFO L413 NwaCegarLoop]: 2907 mSDtfsCounter, 1241 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 4541 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:02:50,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 4541 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:02:50,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2022-07-19 18:02:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2324. [2022-07-19 18:02:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2322 states have (on average 1.677433247200689) internal successors, (3895), 2323 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3895 transitions. [2022-07-19 18:02:50,241 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3895 transitions. Word has length 196 [2022-07-19 18:02:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:02:50,242 INFO L495 AbstractCegarLoop]: Abstraction has 2324 states and 3895 transitions. [2022-07-19 18:02:50,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 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) [2022-07-19 18:02:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3895 transitions. [2022-07-19 18:02:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-19 18:02:50,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:02:50,250 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:02:50,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 18:02:50,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:02:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:02:50,251 INFO L85 PathProgramCache]: Analyzing trace with hash 339194995, now seen corresponding path program 1 times [2022-07-19 18:02:50,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:02:50,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138365269] [2022-07-19 18:02:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:02:50,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:02:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:02:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:02:50,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:02:50,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138365269] [2022-07-19 18:02:50,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138365269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:02:50,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:02:50,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:02:50,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430885542] [2022-07-19 18:02:50,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:02:50,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:02:50,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:02:50,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:02:50,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:50,406 INFO L87 Difference]: Start difference. First operand 2324 states and 3895 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:50,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:02:50,816 INFO L93 Difference]: Finished difference Result 6356 states and 10643 transitions. [2022-07-19 18:02:50,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:02:50,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 199 [2022-07-19 18:02:50,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:02:50,836 INFO L225 Difference]: With dead ends: 6356 [2022-07-19 18:02:50,837 INFO L226 Difference]: Without dead ends: 4258 [2022-07-19 18:02:50,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:50,850 INFO L413 NwaCegarLoop]: 2994 mSDtfsCounter, 1399 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 4712 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 18:02:50,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1399 Valid, 4712 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 18:02:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2022-07-19 18:02:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 4237. [2022-07-19 18:02:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4235 states have (on average 1.667060212514758) internal successors, (7060), 4236 states have internal predecessors, (7060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:51,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 7060 transitions. [2022-07-19 18:02:51,190 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 7060 transitions. Word has length 199 [2022-07-19 18:02:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:02:51,191 INFO L495 AbstractCegarLoop]: Abstraction has 4237 states and 7060 transitions. [2022-07-19 18:02:51,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 7060 transitions. [2022-07-19 18:02:51,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-19 18:02:51,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:02:51,203 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:02:51,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 18:02:51,203 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:02:51,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:02:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash 62690234, now seen corresponding path program 1 times [2022-07-19 18:02:51,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:02:51,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926944715] [2022-07-19 18:02:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:02:51,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:02:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:02:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:02:51,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:02:51,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926944715] [2022-07-19 18:02:51,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926944715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:02:51,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:02:51,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:02:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759737655] [2022-07-19 18:02:51,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:02:51,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:02:51,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:02:51,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:02:51,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:51,321 INFO L87 Difference]: Start difference. First operand 4237 states and 7060 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:02:51,723 INFO L93 Difference]: Finished difference Result 7494 states and 12548 transitions. [2022-07-19 18:02:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:02:51,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 204 [2022-07-19 18:02:51,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:02:51,747 INFO L225 Difference]: With dead ends: 7494 [2022-07-19 18:02:51,747 INFO L226 Difference]: Without dead ends: 5396 [2022-07-19 18:02:51,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:51,755 INFO L413 NwaCegarLoop]: 2840 mSDtfsCounter, 1212 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 4431 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:02:51,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 4431 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:02:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5396 states. [2022-07-19 18:02:52,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5396 to 5392. [2022-07-19 18:02:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5390 states have (on average 1.6701298701298701) internal successors, (9002), 5391 states have internal predecessors, (9002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 9002 transitions. [2022-07-19 18:02:52,147 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 9002 transitions. Word has length 204 [2022-07-19 18:02:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:02:52,151 INFO L495 AbstractCegarLoop]: Abstraction has 5392 states and 9002 transitions. [2022-07-19 18:02:52,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 9002 transitions. [2022-07-19 18:02:52,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-19 18:02:52,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:02:52,164 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:02:52,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 18:02:52,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:02:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:02:52,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1975423087, now seen corresponding path program 1 times [2022-07-19 18:02:52,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:02:52,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703177199] [2022-07-19 18:02:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:02:52,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:02:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:02:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:02:52,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:02:52,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703177199] [2022-07-19 18:02:52,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703177199] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:02:52,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:02:52,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:02:52,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381755395] [2022-07-19 18:02:52,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:02:52,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:02:52,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:02:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:02:52,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:52,294 INFO L87 Difference]: Start difference. First operand 5392 states and 9002 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:02:52,998 INFO L93 Difference]: Finished difference Result 15236 states and 25366 transitions. [2022-07-19 18:02:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:02:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 207 [2022-07-19 18:02:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:02:53,042 INFO L225 Difference]: With dead ends: 15236 [2022-07-19 18:02:53,043 INFO L226 Difference]: Without dead ends: 10088 [2022-07-19 18:02:53,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:53,057 INFO L413 NwaCegarLoop]: 2919 mSDtfsCounter, 1368 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1368 SdHoareTripleChecker+Valid, 4586 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 18:02:53,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1368 Valid, 4586 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 18:02:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10088 states. [2022-07-19 18:02:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10088 to 10035. [2022-07-19 18:02:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10035 states, 10033 states have (on average 1.6552377155387221) internal successors, (16607), 10034 states have internal predecessors, (16607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10035 states to 10035 states and 16607 transitions. [2022-07-19 18:02:53,836 INFO L78 Accepts]: Start accepts. Automaton has 10035 states and 16607 transitions. Word has length 207 [2022-07-19 18:02:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:02:53,837 INFO L495 AbstractCegarLoop]: Abstraction has 10035 states and 16607 transitions. [2022-07-19 18:02:53,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 10035 states and 16607 transitions. [2022-07-19 18:02:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-07-19 18:02:53,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:02:53,858 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:02:53,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 18:02:53,859 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:02:53,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:02:53,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1745832106, now seen corresponding path program 1 times [2022-07-19 18:02:53,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:02:53,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364463070] [2022-07-19 18:02:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:02:53,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:02:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:02:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:02:53,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:02:53,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364463070] [2022-07-19 18:02:53,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364463070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:02:53,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:02:53,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:02:53,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355304113] [2022-07-19 18:02:53,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:02:53,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:02:53,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:02:53,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:02:53,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:53,959 INFO L87 Difference]: Start difference. First operand 10035 states and 16607 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:02:54,834 INFO L93 Difference]: Finished difference Result 18168 states and 30221 transitions. [2022-07-19 18:02:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:02:54,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2022-07-19 18:02:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:02:54,879 INFO L225 Difference]: With dead ends: 18168 [2022-07-19 18:02:54,879 INFO L226 Difference]: Without dead ends: 13020 [2022-07-19 18:02:54,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:54,896 INFO L413 NwaCegarLoop]: 2765 mSDtfsCounter, 1183 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 4305 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:02:54,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1183 Valid, 4305 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:02:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13020 states. [2022-07-19 18:02:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13020 to 13016. [2022-07-19 18:02:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13016 states, 13014 states have (on average 1.657061625941294) internal successors, (21565), 13015 states have internal predecessors, (21565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13016 states to 13016 states and 21565 transitions. [2022-07-19 18:02:55,796 INFO L78 Accepts]: Start accepts. Automaton has 13016 states and 21565 transitions. Word has length 212 [2022-07-19 18:02:55,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:02:55,797 INFO L495 AbstractCegarLoop]: Abstraction has 13016 states and 21565 transitions. [2022-07-19 18:02:55,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:55,797 INFO L276 IsEmpty]: Start isEmpty. Operand 13016 states and 21565 transitions. [2022-07-19 18:02:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-19 18:02:55,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:02:55,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:02:55,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 18:02:55,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:02:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:02:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1067466193, now seen corresponding path program 1 times [2022-07-19 18:02:55,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:02:55,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917285583] [2022-07-19 18:02:55,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:02:55,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:02:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:02:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:02:55,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:02:55,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917285583] [2022-07-19 18:02:55,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917285583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:02:55,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:02:55,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:02:55,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356667776] [2022-07-19 18:02:55,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:02:55,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:02:55,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:02:55,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:02:55,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:55,918 INFO L87 Difference]: Start difference. First operand 13016 states and 21565 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:57,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:02:57,544 INFO L93 Difference]: Finished difference Result 37226 states and 61403 transitions. [2022-07-19 18:02:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:02:57,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 215 [2022-07-19 18:02:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:02:57,617 INFO L225 Difference]: With dead ends: 37226 [2022-07-19 18:02:57,618 INFO L226 Difference]: Without dead ends: 24472 [2022-07-19 18:02:57,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:57,654 INFO L413 NwaCegarLoop]: 2844 mSDtfsCounter, 1337 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 4460 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 18:02:57,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1337 Valid, 4460 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 18:02:57,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24472 states. [2022-07-19 18:02:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24472 to 24325. [2022-07-19 18:02:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24325 states, 24323 states have (on average 1.637380257369568) internal successors, (39826), 24324 states have internal predecessors, (39826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24325 states to 24325 states and 39826 transitions. [2022-07-19 18:02:59,420 INFO L78 Accepts]: Start accepts. Automaton has 24325 states and 39826 transitions. Word has length 215 [2022-07-19 18:02:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:02:59,421 INFO L495 AbstractCegarLoop]: Abstraction has 24325 states and 39826 transitions. [2022-07-19 18:02:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:02:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 24325 states and 39826 transitions. [2022-07-19 18:02:59,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-07-19 18:02:59,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:02:59,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:02:59,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 18:02:59,466 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:02:59,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:02:59,466 INFO L85 PathProgramCache]: Analyzing trace with hash -518054986, now seen corresponding path program 1 times [2022-07-19 18:02:59,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:02:59,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804022427] [2022-07-19 18:02:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:02:59,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:02:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:02:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:02:59,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:02:59,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804022427] [2022-07-19 18:02:59,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804022427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:02:59,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:02:59,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:02:59,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152837602] [2022-07-19 18:02:59,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:02:59,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:02:59,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:02:59,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:02:59,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:02:59,581 INFO L87 Difference]: Start difference. First operand 24325 states and 39826 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:01,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:01,173 INFO L93 Difference]: Finished difference Result 44146 states and 72658 transitions. [2022-07-19 18:03:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:03:01,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2022-07-19 18:03:01,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:01,271 INFO L225 Difference]: With dead ends: 44146 [2022-07-19 18:03:01,271 INFO L226 Difference]: Without dead ends: 31392 [2022-07-19 18:03:01,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:03:01,303 INFO L413 NwaCegarLoop]: 2690 mSDtfsCounter, 1154 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 4179 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:03:01,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1154 Valid, 4179 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:03:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31392 states. [2022-07-19 18:03:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31392 to 31388. [2022-07-19 18:03:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31388 states, 31386 states have (on average 1.636908175619703) internal successors, (51376), 31387 states have internal predecessors, (51376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31388 states to 31388 states and 51376 transitions. [2022-07-19 18:03:03,262 INFO L78 Accepts]: Start accepts. Automaton has 31388 states and 51376 transitions. Word has length 220 [2022-07-19 18:03:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:03,263 INFO L495 AbstractCegarLoop]: Abstraction has 31388 states and 51376 transitions. [2022-07-19 18:03:03,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 31388 states and 51376 transitions. [2022-07-19 18:03:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-19 18:03:03,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:03,319 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:03:03,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 18:03:03,319 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:03,321 INFO L85 PathProgramCache]: Analyzing trace with hash 855859059, now seen corresponding path program 1 times [2022-07-19 18:03:03,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:03,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68169564] [2022-07-19 18:03:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:03,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:03,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:03,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68169564] [2022-07-19 18:03:03,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68169564] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:03,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:03,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 18:03:03,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018016043] [2022-07-19 18:03:03,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:03,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 18:03:03,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:03,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 18:03:03,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 18:03:03,447 INFO L87 Difference]: Start difference. First operand 31388 states and 51376 transitions. Second operand has 6 states, 6 states have (on average 37.166666666666664) internal successors, (223), 6 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:12,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:12,620 INFO L93 Difference]: Finished difference Result 198225 states and 327011 transitions. [2022-07-19 18:03:12,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 18:03:12,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 37.166666666666664) internal successors, (223), 6 states have internal predecessors, (223), 0 states have call successors, (0), 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 223 [2022-07-19 18:03:12,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:13,363 INFO L225 Difference]: With dead ends: 198225 [2022-07-19 18:03:13,363 INFO L226 Difference]: Without dead ends: 167111 [2022-07-19 18:03:13,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-19 18:03:13,489 INFO L413 NwaCegarLoop]: 3517 mSDtfsCounter, 10696 mSDsluCounter, 10586 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10696 SdHoareTripleChecker+Valid, 14103 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 18:03:13,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10696 Valid, 14103 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 18:03:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167111 states. [2022-07-19 18:03:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167111 to 61336. [2022-07-19 18:03:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61336 states, 61334 states have (on average 1.6298627188834904) internal successors, (99966), 61335 states have internal predecessors, (99966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61336 states to 61336 states and 99966 transitions. [2022-07-19 18:03:18,363 INFO L78 Accepts]: Start accepts. Automaton has 61336 states and 99966 transitions. Word has length 223 [2022-07-19 18:03:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:18,364 INFO L495 AbstractCegarLoop]: Abstraction has 61336 states and 99966 transitions. [2022-07-19 18:03:18,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.166666666666664) internal successors, (223), 6 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 61336 states and 99966 transitions. [2022-07-19 18:03:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-19 18:03:18,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:18,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:03:18,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 18:03:18,434 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:18,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1539236947, now seen corresponding path program 1 times [2022-07-19 18:03:18,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:18,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782473779] [2022-07-19 18:03:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:18,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:18,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:18,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782473779] [2022-07-19 18:03:18,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782473779] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:18,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:18,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 18:03:18,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330380784] [2022-07-19 18:03:18,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:18,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 18:03:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 18:03:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 18:03:18,524 INFO L87 Difference]: Start difference. First operand 61336 states and 99966 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:27,797 INFO L93 Difference]: Finished difference Result 200629 states and 328993 transitions. [2022-07-19 18:03:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 18:03:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2022-07-19 18:03:27,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:28,167 INFO L225 Difference]: With dead ends: 200629 [2022-07-19 18:03:28,168 INFO L226 Difference]: Without dead ends: 139567 [2022-07-19 18:03:28,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:03:28,263 INFO L413 NwaCegarLoop]: 1755 mSDtfsCounter, 4165 mSDsluCounter, 4052 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4165 SdHoareTripleChecker+Valid, 5807 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 18:03:28,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4165 Valid, 5807 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 18:03:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139567 states.