./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6267d36e2eda753e26c9c989bedb16747ddf010783b33bee2d0cb2d2001d5ce --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 18:05:47,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 18:05:47,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 18:05:47,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 18:05:47,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 18:05:47,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 18:05:47,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 18:05:47,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 18:05:47,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 18:05:47,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 18:05:47,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 18:05:47,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 18:05:47,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 18:05:47,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 18:05:47,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 18:05:47,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 18:05:47,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 18:05:47,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 18:05:47,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 18:05:47,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 18:05:47,768 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 18:05:47,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 18:05:47,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 18:05:47,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 18:05:47,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 18:05:47,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 18:05:47,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 18:05:47,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 18:05:47,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 18:05:47,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 18:05:47,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 18:05:47,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 18:05:47,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 18:05:47,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 18:05:47,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 18:05:47,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 18:05:47,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 18:05:47,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 18:05:47,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 18:05:47,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 18:05:47,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 18:05:47,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 18:05:47,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 18:05:47,819 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 18:05:47,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 18:05:47,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 18:05:47,820 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 18:05:47,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 18:05:47,820 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 18:05:47,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 18:05:47,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 18:05:47,821 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 18:05:47,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 18:05:47,822 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 18:05:47,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 18:05:47,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 18:05:47,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 18:05:47,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 18:05:47,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 18:05:47,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 18:05:47,823 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 18:05:47,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 18:05:47,824 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 18:05:47,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 18:05:47,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 18:05:47,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 18:05:47,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 18:05:47,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 18:05:47,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 18:05:47,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 18:05:47,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 18:05:47,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 18:05:47,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 18:05:47,826 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 18:05:47,826 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 18:05:47,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 18:05:47,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6267d36e2eda753e26c9c989bedb16747ddf010783b33bee2d0cb2d2001d5ce [2022-07-22 18:05:48,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 18:05:48,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 18:05:48,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 18:05:48,056 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 18:05:48,057 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 18:05:48,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2022-07-22 18:05:48,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/837686884/515fe286a63745dfaabdf1f1a77ffb6c/FLAG42f349bc3 [2022-07-22 18:05:48,536 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 18:05:48,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2022-07-22 18:05:48,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/837686884/515fe286a63745dfaabdf1f1a77ffb6c/FLAG42f349bc3 [2022-07-22 18:05:48,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/837686884/515fe286a63745dfaabdf1f1a77ffb6c [2022-07-22 18:05:48,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 18:05:48,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 18:05:48,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 18:05:48,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 18:05:48,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 18:05:48,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:48,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f033d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48, skipping insertion in model container [2022-07-22 18:05:48,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:48,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 18:05:48,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 18:05:48,821 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2022-07-22 18:05:48,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 18:05:48,829 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 18:05:48,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2022-07-22 18:05:48,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 18:05:48,878 INFO L208 MainTranslator]: Completed translation [2022-07-22 18:05:48,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48 WrapperNode [2022-07-22 18:05:48,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 18:05:48,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 18:05:48,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 18:05:48,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 18:05:48,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:48,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:48,948 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 465 [2022-07-22 18:05:48,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 18:05:48,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 18:05:48,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 18:05:48,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 18:05:48,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:48,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:48,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:48,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:48,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:48,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:48,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:49,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 18:05:49,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 18:05:49,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 18:05:49,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 18:05:49,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48" (1/1) ... [2022-07-22 18:05:49,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 18:05:49,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 18:05:49,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 18:05:49,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 18:05:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 18:05:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 18:05:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 18:05:49,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 18:05:49,212 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 18:05:49,213 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 18:05:49,684 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 18:05:49,696 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 18:05:49,697 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 18:05:49,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 06:05:49 BoogieIcfgContainer [2022-07-22 18:05:49,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 18:05:49,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 18:05:49,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 18:05:49,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 18:05:49,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 06:05:48" (1/3) ... [2022-07-22 18:05:49,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abb226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 06:05:49, skipping insertion in model container [2022-07-22 18:05:49,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:05:48" (2/3) ... [2022-07-22 18:05:49,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abb226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 06:05:49, skipping insertion in model container [2022-07-22 18:05:49,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 06:05:49" (3/3) ... [2022-07-22 18:05:49,705 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2022-07-22 18:05:49,720 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 18:05:49,721 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 18:05:49,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 18:05:49,783 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@6c4b0bf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7b638765 [2022-07-22 18:05:49,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 18:05:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 18:05:49,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:49,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:05:49,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:49,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:49,814 INFO L85 PathProgramCache]: Analyzing trace with hash -479003881, now seen corresponding path program 1 times [2022-07-22 18:05:49,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:49,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918971390] [2022-07-22 18:05:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:50,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:50,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918971390] [2022-07-22 18:05:50,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918971390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:50,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:50,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 18:05:50,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949992296] [2022-07-22 18:05:50,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:50,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 18:05:50,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:50,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 18:05:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 18:05:50,103 INFO L87 Difference]: Start difference. First operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:50,129 INFO L93 Difference]: Finished difference Result 221 states and 376 transitions. [2022-07-22 18:05:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 18:05:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-22 18:05:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:50,138 INFO L225 Difference]: With dead ends: 221 [2022-07-22 18:05:50,138 INFO L226 Difference]: Without dead ends: 133 [2022-07-22 18:05:50,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 18:05:50,143 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:50,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:50,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-22 18:05:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-07-22 18:05:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 132 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 229 transitions. [2022-07-22 18:05:50,179 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 229 transitions. Word has length 37 [2022-07-22 18:05:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:50,179 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 229 transitions. [2022-07-22 18:05:50,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 229 transitions. [2022-07-22 18:05:50,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 18:05:50,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:50,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:05:50,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 18:05:50,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:50,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1296652331, now seen corresponding path program 1 times [2022-07-22 18:05:50,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:50,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480284454] [2022-07-22 18:05:50,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:50,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:50,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:50,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480284454] [2022-07-22 18:05:50,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480284454] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:50,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:50,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:05:50,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110207517] [2022-07-22 18:05:50,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:50,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:05:50,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:05:50,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:05:50,332 INFO L87 Difference]: Start difference. First operand 133 states and 229 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:50,441 INFO L93 Difference]: Finished difference Result 295 states and 499 transitions. [2022-07-22 18:05:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 18:05:50,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-22 18:05:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:50,443 INFO L225 Difference]: With dead ends: 295 [2022-07-22 18:05:50,446 INFO L226 Difference]: Without dead ends: 212 [2022-07-22 18:05:50,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:05:50,448 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 135 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:50,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 871 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:05:50,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-22 18:05:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 133. [2022-07-22 18:05:50,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.553030303030303) internal successors, (205), 132 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 205 transitions. [2022-07-22 18:05:50,462 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 205 transitions. Word has length 37 [2022-07-22 18:05:50,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:50,463 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 205 transitions. [2022-07-22 18:05:50,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,464 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 205 transitions. [2022-07-22 18:05:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 18:05:50,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:50,469 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] [2022-07-22 18:05:50,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 18:05:50,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:50,472 INFO L85 PathProgramCache]: Analyzing trace with hash 141893846, now seen corresponding path program 1 times [2022-07-22 18:05:50,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:50,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211553857] [2022-07-22 18:05:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:50,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:50,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:50,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211553857] [2022-07-22 18:05:50,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211553857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:50,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:50,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:05:50,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902229816] [2022-07-22 18:05:50,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:50,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:05:50,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:50,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:05:50,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:05:50,573 INFO L87 Difference]: Start difference. First operand 133 states and 205 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:50,610 INFO L93 Difference]: Finished difference Result 281 states and 453 transitions. [2022-07-22 18:05:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:05:50,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2022-07-22 18:05:50,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:50,614 INFO L225 Difference]: With dead ends: 281 [2022-07-22 18:05:50,614 INFO L226 Difference]: Without dead ends: 202 [2022-07-22 18:05:50,616 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 [2022-07-22 18:05:50,621 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 107 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:50,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 372 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-22 18:05:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-07-22 18:05:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.5778894472361809) internal successors, (314), 199 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 314 transitions. [2022-07-22 18:05:50,637 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 314 transitions. Word has length 60 [2022-07-22 18:05:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:50,637 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 314 transitions. [2022-07-22 18:05:50,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 314 transitions. [2022-07-22 18:05:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 18:05:50,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:50,639 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] [2022-07-22 18:05:50,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 18:05:50,639 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash -653639893, now seen corresponding path program 1 times [2022-07-22 18:05:50,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:50,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199727320] [2022-07-22 18:05:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:50,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:50,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:50,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199727320] [2022-07-22 18:05:50,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199727320] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:50,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:50,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:05:50,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365902967] [2022-07-22 18:05:50,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:50,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:05:50,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:50,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:05:50,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:05:50,700 INFO L87 Difference]: Start difference. First operand 200 states and 314 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:50,721 INFO L93 Difference]: Finished difference Result 476 states and 770 transitions. [2022-07-22 18:05:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:05:50,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2022-07-22 18:05:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:50,724 INFO L225 Difference]: With dead ends: 476 [2022-07-22 18:05:50,724 INFO L226 Difference]: Without dead ends: 330 [2022-07-22 18:05:50,724 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 [2022-07-22 18:05:50,725 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 109 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:50,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 380 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-22 18:05:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2022-07-22 18:05:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.6055045871559632) internal successors, (525), 327 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 525 transitions. [2022-07-22 18:05:50,737 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 525 transitions. Word has length 62 [2022-07-22 18:05:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:50,737 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 525 transitions. [2022-07-22 18:05:50,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 525 transitions. [2022-07-22 18:05:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 18:05:50,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:50,738 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] [2022-07-22 18:05:50,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 18:05:50,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:50,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1628052192, now seen corresponding path program 1 times [2022-07-22 18:05:50,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:50,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139272217] [2022-07-22 18:05:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:50,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:50,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:50,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139272217] [2022-07-22 18:05:50,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139272217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:50,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:50,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:05:50,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837301122] [2022-07-22 18:05:50,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:50,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:05:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:05:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:05:50,785 INFO L87 Difference]: Start difference. First operand 328 states and 525 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:50,802 INFO L93 Difference]: Finished difference Result 844 states and 1375 transitions. [2022-07-22 18:05:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:05:50,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2022-07-22 18:05:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:50,805 INFO L225 Difference]: With dead ends: 844 [2022-07-22 18:05:50,805 INFO L226 Difference]: Without dead ends: 570 [2022-07-22 18:05:50,806 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 [2022-07-22 18:05:50,806 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 103 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:50,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 381 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:50,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-07-22 18:05:50,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 568. [2022-07-22 18:05:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.617283950617284) internal successors, (917), 567 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 917 transitions. [2022-07-22 18:05:50,821 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 917 transitions. Word has length 64 [2022-07-22 18:05:50,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:50,821 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 917 transitions. [2022-07-22 18:05:50,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 917 transitions. [2022-07-22 18:05:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 18:05:50,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:50,822 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] [2022-07-22 18:05:50,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 18:05:50,823 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:50,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1698900981, now seen corresponding path program 1 times [2022-07-22 18:05:50,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:50,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899312553] [2022-07-22 18:05:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:50,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:50,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:50,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899312553] [2022-07-22 18:05:50,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899312553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:50,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:50,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:05:50,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420347538] [2022-07-22 18:05:50,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:50,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:05:50,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:50,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:05:50,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:05:50,871 INFO L87 Difference]: Start difference. First operand 568 states and 917 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:51,023 INFO L93 Difference]: Finished difference Result 2444 states and 4039 transitions. [2022-07-22 18:05:51,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 18:05:51,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-07-22 18:05:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:51,029 INFO L225 Difference]: With dead ends: 2444 [2022-07-22 18:05:51,030 INFO L226 Difference]: Without dead ends: 1930 [2022-07-22 18:05:51,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 18:05:51,031 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 863 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:51,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 1352 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:05:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2022-07-22 18:05:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1017. [2022-07-22 18:05:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 1.6289370078740157) internal successors, (1655), 1016 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1655 transitions. [2022-07-22 18:05:51,071 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1655 transitions. Word has length 66 [2022-07-22 18:05:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:51,072 INFO L495 AbstractCegarLoop]: Abstraction has 1017 states and 1655 transitions. [2022-07-22 18:05:51,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1655 transitions. [2022-07-22 18:05:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 18:05:51,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:51,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:05:51,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 18:05:51,074 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash -796509765, now seen corresponding path program 1 times [2022-07-22 18:05:51,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:51,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696965378] [2022-07-22 18:05:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:51,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:51,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:51,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696965378] [2022-07-22 18:05:51,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696965378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:51,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:51,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:05:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183025398] [2022-07-22 18:05:51,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:51,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:05:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:05:51,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:05:51,124 INFO L87 Difference]: Start difference. First operand 1017 states and 1655 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:51,195 INFO L93 Difference]: Finished difference Result 2966 states and 4892 transitions. [2022-07-22 18:05:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:05:51,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-22 18:05:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:51,216 INFO L225 Difference]: With dead ends: 2966 [2022-07-22 18:05:51,218 INFO L226 Difference]: Without dead ends: 2003 [2022-07-22 18:05:51,221 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 [2022-07-22 18:05:51,224 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 385 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:51,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 678 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-07-22 18:05:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1501. [2022-07-22 18:05:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 1.6353333333333333) internal successors, (2453), 1500 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 2453 transitions. [2022-07-22 18:05:51,327 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 2453 transitions. Word has length 67 [2022-07-22 18:05:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:51,328 INFO L495 AbstractCegarLoop]: Abstraction has 1501 states and 2453 transitions. [2022-07-22 18:05:51,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 2453 transitions. [2022-07-22 18:05:51,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 18:05:51,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:51,329 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] [2022-07-22 18:05:51,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 18:05:51,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:51,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:51,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2022785868, now seen corresponding path program 1 times [2022-07-22 18:05:51,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:51,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017246532] [2022-07-22 18:05:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:51,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:51,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:51,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017246532] [2022-07-22 18:05:51,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017246532] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:51,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:51,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:05:51,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876076271] [2022-07-22 18:05:51,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:51,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:05:51,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:51,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:05:51,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:05:51,419 INFO L87 Difference]: Start difference. First operand 1501 states and 2453 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:51,481 INFO L93 Difference]: Finished difference Result 3316 states and 5473 transitions. [2022-07-22 18:05:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:05:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-22 18:05:51,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:51,487 INFO L225 Difference]: With dead ends: 3316 [2022-07-22 18:05:51,487 INFO L226 Difference]: Without dead ends: 2278 [2022-07-22 18:05:51,489 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 [2022-07-22 18:05:51,490 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 116 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:51,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 467 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2022-07-22 18:05:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2276. [2022-07-22 18:05:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 1.6360439560439561) internal successors, (3722), 2275 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 3722 transitions. [2022-07-22 18:05:51,613 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 3722 transitions. Word has length 68 [2022-07-22 18:05:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:51,613 INFO L495 AbstractCegarLoop]: Abstraction has 2276 states and 3722 transitions. [2022-07-22 18:05:51,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 3722 transitions. [2022-07-22 18:05:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 18:05:51,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:51,615 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] [2022-07-22 18:05:51,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 18:05:51,619 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:51,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:51,619 INFO L85 PathProgramCache]: Analyzing trace with hash -675827220, now seen corresponding path program 1 times [2022-07-22 18:05:51,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:51,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451433553] [2022-07-22 18:05:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:51,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:51,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:51,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451433553] [2022-07-22 18:05:51,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451433553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:51,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:51,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:05:51,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085882119] [2022-07-22 18:05:51,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:51,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:05:51,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:05:51,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:05:51,685 INFO L87 Difference]: Start difference. First operand 2276 states and 3722 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:51,822 INFO L93 Difference]: Finished difference Result 6680 states and 10988 transitions. [2022-07-22 18:05:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:05:51,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-22 18:05:51,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:51,833 INFO L225 Difference]: With dead ends: 6680 [2022-07-22 18:05:51,833 INFO L226 Difference]: Without dead ends: 4460 [2022-07-22 18:05:51,836 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 [2022-07-22 18:05:51,836 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 384 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:51,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 626 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-07-22 18:05:51,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3349. [2022-07-22 18:05:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3348 states have (on average 1.6314217443249701) internal successors, (5462), 3348 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 5462 transitions. [2022-07-22 18:05:51,965 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 5462 transitions. Word has length 68 [2022-07-22 18:05:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:51,965 INFO L495 AbstractCegarLoop]: Abstraction has 3349 states and 5462 transitions. [2022-07-22 18:05:51,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:51,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 5462 transitions. [2022-07-22 18:05:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 18:05:51,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:51,966 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] [2022-07-22 18:05:51,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 18:05:51,966 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash -446846068, now seen corresponding path program 1 times [2022-07-22 18:05:51,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:51,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470330495] [2022-07-22 18:05:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:51,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:51,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:51,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470330495] [2022-07-22 18:05:51,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470330495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:51,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:51,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:05:51,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102470536] [2022-07-22 18:05:51,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:51,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:05:51,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:05:51,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:05:51,997 INFO L87 Difference]: Start difference. First operand 3349 states and 5462 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:52,121 INFO L93 Difference]: Finished difference Result 6705 states and 10949 transitions. [2022-07-22 18:05:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:05:52,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-22 18:05:52,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:52,137 INFO L225 Difference]: With dead ends: 6705 [2022-07-22 18:05:52,138 INFO L226 Difference]: Without dead ends: 4777 [2022-07-22 18:05:52,142 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 [2022-07-22 18:05:52,143 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 104 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:52,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 427 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2022-07-22 18:05:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4775. [2022-07-22 18:05:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4775 states, 4774 states have (on average 1.6206535400083788) internal successors, (7737), 4774 states have internal predecessors, (7737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 7737 transitions. [2022-07-22 18:05:52,308 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 7737 transitions. Word has length 68 [2022-07-22 18:05:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:52,308 INFO L495 AbstractCegarLoop]: Abstraction has 4775 states and 7737 transitions. [2022-07-22 18:05:52,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 7737 transitions. [2022-07-22 18:05:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 18:05:52,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:52,309 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] [2022-07-22 18:05:52,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 18:05:52,309 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1835740012, now seen corresponding path program 1 times [2022-07-22 18:05:52,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:52,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278108472] [2022-07-22 18:05:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:52,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:52,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:52,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278108472] [2022-07-22 18:05:52,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278108472] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:52,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:52,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:05:52,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131226696] [2022-07-22 18:05:52,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:52,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:05:52,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:52,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:05:52,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:05:52,335 INFO L87 Difference]: Start difference. First operand 4775 states and 7737 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:52,518 INFO L93 Difference]: Finished difference Result 10402 states and 16876 transitions. [2022-07-22 18:05:52,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:05:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-22 18:05:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:52,536 INFO L225 Difference]: With dead ends: 10402 [2022-07-22 18:05:52,536 INFO L226 Difference]: Without dead ends: 7073 [2022-07-22 18:05:52,538 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 [2022-07-22 18:05:52,539 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 110 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:52,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 458 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2022-07-22 18:05:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 7071. [2022-07-22 18:05:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 1.608062234794908) internal successors, (11369), 7070 states have internal predecessors, (11369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 11369 transitions. [2022-07-22 18:05:52,786 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 11369 transitions. Word has length 68 [2022-07-22 18:05:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:52,786 INFO L495 AbstractCegarLoop]: Abstraction has 7071 states and 11369 transitions. [2022-07-22 18:05:52,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 11369 transitions. [2022-07-22 18:05:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 18:05:52,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:52,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:05:52,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 18:05:52,788 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:52,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1060631278, now seen corresponding path program 1 times [2022-07-22 18:05:52,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:52,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658160227] [2022-07-22 18:05:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:52,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:52,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:52,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658160227] [2022-07-22 18:05:52,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658160227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:52,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:52,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:05:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405469851] [2022-07-22 18:05:52,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:52,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:05:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:05:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:05:52,820 INFO L87 Difference]: Start difference. First operand 7071 states and 11369 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:53,295 INFO L93 Difference]: Finished difference Result 22178 states and 35738 transitions. [2022-07-22 18:05:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:05:53,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 18:05:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:53,319 INFO L225 Difference]: With dead ends: 22178 [2022-07-22 18:05:53,319 INFO L226 Difference]: Without dead ends: 15187 [2022-07-22 18:05:53,327 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 [2022-07-22 18:05:53,328 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 382 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:53,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 670 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15187 states. [2022-07-22 18:05:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15187 to 11086. [2022-07-22 18:05:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11086 states, 11085 states have (on average 1.5983761840324764) internal successors, (17718), 11085 states have internal predecessors, (17718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11086 states to 11086 states and 17718 transitions. [2022-07-22 18:05:53,693 INFO L78 Accepts]: Start accepts. Automaton has 11086 states and 17718 transitions. Word has length 69 [2022-07-22 18:05:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:53,693 INFO L495 AbstractCegarLoop]: Abstraction has 11086 states and 17718 transitions. [2022-07-22 18:05:53,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 11086 states and 17718 transitions. [2022-07-22 18:05:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 18:05:53,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:53,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:05:53,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 18:05:53,695 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:53,695 INFO L85 PathProgramCache]: Analyzing trace with hash 808037418, now seen corresponding path program 1 times [2022-07-22 18:05:53,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:53,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869768840] [2022-07-22 18:05:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:53,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:53,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:53,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869768840] [2022-07-22 18:05:53,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869768840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:53,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:53,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:05:53,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566633171] [2022-07-22 18:05:53,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:53,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:05:53,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:53,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:05:53,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:05:53,779 INFO L87 Difference]: Start difference. First operand 11086 states and 17718 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:54,223 INFO L93 Difference]: Finished difference Result 22094 states and 35327 transitions. [2022-07-22 18:05:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:05:54,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-22 18:05:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:54,245 INFO L225 Difference]: With dead ends: 22094 [2022-07-22 18:05:54,245 INFO L226 Difference]: Without dead ends: 11088 [2022-07-22 18:05:54,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 18:05:54,260 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 283 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:54,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 543 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:05:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11088 states. [2022-07-22 18:05:54,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11088 to 11086. [2022-07-22 18:05:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11086 states, 11085 states have (on average 1.5870996842580063) internal successors, (17593), 11085 states have internal predecessors, (17593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11086 states to 11086 states and 17593 transitions. [2022-07-22 18:05:54,651 INFO L78 Accepts]: Start accepts. Automaton has 11086 states and 17593 transitions. Word has length 71 [2022-07-22 18:05:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:54,651 INFO L495 AbstractCegarLoop]: Abstraction has 11086 states and 17593 transitions. [2022-07-22 18:05:54,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:54,652 INFO L276 IsEmpty]: Start isEmpty. Operand 11086 states and 17593 transitions. [2022-07-22 18:05:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 18:05:54,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:54,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:05:54,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 18:05:54,653 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash 653988143, now seen corresponding path program 1 times [2022-07-22 18:05:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:54,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918172988] [2022-07-22 18:05:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:54,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:54,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:54,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918172988] [2022-07-22 18:05:54,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918172988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:54,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:54,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:05:54,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643772744] [2022-07-22 18:05:54,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:54,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:05:54,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:54,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:05:54,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:05:54,718 INFO L87 Difference]: Start difference. First operand 11086 states and 17593 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:55,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:55,352 INFO L93 Difference]: Finished difference Result 31750 states and 50527 transitions. [2022-07-22 18:05:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:05:55,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-22 18:05:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:55,432 INFO L225 Difference]: With dead ends: 31750 [2022-07-22 18:05:55,432 INFO L226 Difference]: Without dead ends: 20744 [2022-07-22 18:05:55,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 18:05:55,446 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 380 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:55,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 550 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20744 states. [2022-07-22 18:05:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20744 to 20742. [2022-07-22 18:05:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20742 states, 20741 states have (on average 1.5743696060942096) internal successors, (32654), 20741 states have internal predecessors, (32654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20742 states to 20742 states and 32654 transitions. [2022-07-22 18:05:56,199 INFO L78 Accepts]: Start accepts. Automaton has 20742 states and 32654 transitions. Word has length 74 [2022-07-22 18:05:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:56,199 INFO L495 AbstractCegarLoop]: Abstraction has 20742 states and 32654 transitions. [2022-07-22 18:05:56,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 20742 states and 32654 transitions. [2022-07-22 18:05:56,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 18:05:56,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:56,200 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] [2022-07-22 18:05:56,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 18:05:56,201 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:56,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1629779693, now seen corresponding path program 1 times [2022-07-22 18:05:56,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:56,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247788206] [2022-07-22 18:05:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:56,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:05:56,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:56,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247788206] [2022-07-22 18:05:56,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247788206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:56,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:56,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:05:56,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086628349] [2022-07-22 18:05:56,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:56,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:05:56,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:05:56,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:05:56,263 INFO L87 Difference]: Start difference. First operand 20742 states and 32654 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:57,497 INFO L93 Difference]: Finished difference Result 40553 states and 63100 transitions. [2022-07-22 18:05:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 18:05:57,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-22 18:05:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:57,640 INFO L225 Difference]: With dead ends: 40553 [2022-07-22 18:05:57,640 INFO L226 Difference]: Without dead ends: 40551 [2022-07-22 18:05:57,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 18:05:57,654 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 341 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:57,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 887 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:05:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40551 states. [2022-07-22 18:05:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40551 to 21828. [2022-07-22 18:05:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21828 states, 21827 states have (on average 1.545379575754799) internal successors, (33731), 21827 states have internal predecessors, (33731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21828 states to 21828 states and 33731 transitions. [2022-07-22 18:05:58,589 INFO L78 Accepts]: Start accepts. Automaton has 21828 states and 33731 transitions. Word has length 75 [2022-07-22 18:05:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:05:58,590 INFO L495 AbstractCegarLoop]: Abstraction has 21828 states and 33731 transitions. [2022-07-22 18:05:58,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:58,590 INFO L276 IsEmpty]: Start isEmpty. Operand 21828 states and 33731 transitions. [2022-07-22 18:05:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 18:05:58,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:05:58,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:05:58,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 18:05:58,595 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:05:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:05:58,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1037650854, now seen corresponding path program 1 times [2022-07-22 18:05:58,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:05:58,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359525250] [2022-07-22 18:05:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:05:58,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:05:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:05:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 18:05:58,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:05:58,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359525250] [2022-07-22 18:05:58,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359525250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:05:58,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:05:58,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:05:58,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141926592] [2022-07-22 18:05:58,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:05:58,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:05:58,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:05:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:05:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:05:58,655 INFO L87 Difference]: Start difference. First operand 21828 states and 33731 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:06:00,094 INFO L93 Difference]: Finished difference Result 53616 states and 83123 transitions. [2022-07-22 18:06:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:06:00,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-22 18:06:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:06:00,157 INFO L225 Difference]: With dead ends: 53616 [2022-07-22 18:06:00,158 INFO L226 Difference]: Without dead ends: 43014 [2022-07-22 18:06:00,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:06:00,174 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 489 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:06:00,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 835 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:06:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43014 states. [2022-07-22 18:06:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43014 to 33572. [2022-07-22 18:06:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33572 states, 33571 states have (on average 1.5427303327276518) internal successors, (51791), 33571 states have internal predecessors, (51791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33572 states to 33572 states and 51791 transitions. [2022-07-22 18:06:01,965 INFO L78 Accepts]: Start accepts. Automaton has 33572 states and 51791 transitions. Word has length 101 [2022-07-22 18:06:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:06:01,965 INFO L495 AbstractCegarLoop]: Abstraction has 33572 states and 51791 transitions. [2022-07-22 18:06:01,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 33572 states and 51791 transitions. [2022-07-22 18:06:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 18:06:01,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:06:01,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:06:01,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 18:06:01,968 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:06:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:06:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash 787684506, now seen corresponding path program 1 times [2022-07-22 18:06:01,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:06:01,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130519583] [2022-07-22 18:06:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:06:01,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:06:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:06:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 18:06:02,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:06:02,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130519583] [2022-07-22 18:06:02,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130519583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:06:02,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:06:02,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:06:02,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014578185] [2022-07-22 18:06:02,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:06:02,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:06:02,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:06:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:06:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:06:02,014 INFO L87 Difference]: Start difference. First operand 33572 states and 51791 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:06:03,565 INFO L93 Difference]: Finished difference Result 60140 states and 93241 transitions. [2022-07-22 18:06:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:06:03,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 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 101 [2022-07-22 18:06:03,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:06:03,649 INFO L225 Difference]: With dead ends: 60140 [2022-07-22 18:06:03,649 INFO L226 Difference]: Without dead ends: 49798 [2022-07-22 18:06:03,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:06:03,677 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 492 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:06:03,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 948 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:06:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49798 states. [2022-07-22 18:06:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49798 to 45552. [2022-07-22 18:06:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45552 states, 45551 states have (on average 1.5440056200742025) internal successors, (70331), 45551 states have internal predecessors, (70331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45552 states to 45552 states and 70331 transitions. [2022-07-22 18:06:05,796 INFO L78 Accepts]: Start accepts. Automaton has 45552 states and 70331 transitions. Word has length 101 [2022-07-22 18:06:05,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:06:05,797 INFO L495 AbstractCegarLoop]: Abstraction has 45552 states and 70331 transitions. [2022-07-22 18:06:05,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 45552 states and 70331 transitions. [2022-07-22 18:06:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 18:06:05,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:06:05,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:06:05,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 18:06:05,800 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:06:05,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:06:05,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1224696710, now seen corresponding path program 1 times [2022-07-22 18:06:05,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:06:05,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988602992] [2022-07-22 18:06:05,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:06:05,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:06:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:06:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 18:06:05,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:06:05,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988602992] [2022-07-22 18:06:05,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988602992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:06:05,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:06:05,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:06:05,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47966105] [2022-07-22 18:06:05,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:06:05,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:06:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:06:05,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:06:05,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:06:05,841 INFO L87 Difference]: Start difference. First operand 45552 states and 70331 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:07,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:06:07,814 INFO L93 Difference]: Finished difference Result 64276 states and 99649 transitions. [2022-07-22 18:06:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:06:07,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-22 18:06:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:06:07,906 INFO L225 Difference]: With dead ends: 64276 [2022-07-22 18:06:07,906 INFO L226 Difference]: Without dead ends: 53934 [2022-07-22 18:06:07,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:06:07,935 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 487 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:06:07,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 918 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:06:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53934 states. [2022-07-22 18:06:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53934 to 52232. [2022-07-22 18:06:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52232 states, 52231 states have (on average 1.5456529647144417) internal successors, (80731), 52231 states have internal predecessors, (80731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52232 states to 52232 states and 80731 transitions. [2022-07-22 18:06:10,247 INFO L78 Accepts]: Start accepts. Automaton has 52232 states and 80731 transitions. Word has length 101 [2022-07-22 18:06:10,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:06:10,248 INFO L495 AbstractCegarLoop]: Abstraction has 52232 states and 80731 transitions. [2022-07-22 18:06:10,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 52232 states and 80731 transitions. [2022-07-22 18:06:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 18:06:10,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:06:10,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:06:10,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 18:06:10,250 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:06:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:06:10,251 INFO L85 PathProgramCache]: Analyzing trace with hash 269729270, now seen corresponding path program 1 times [2022-07-22 18:06:10,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:06:10,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728140466] [2022-07-22 18:06:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:06:10,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:06:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:06:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 18:06:10,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:06:10,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728140466] [2022-07-22 18:06:10,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728140466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:06:10,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:06:10,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:06:10,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734984463] [2022-07-22 18:06:10,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:06:10,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:06:10,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:06:10,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:06:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:06:10,285 INFO L87 Difference]: Start difference. First operand 52232 states and 80731 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:12,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:06:12,780 INFO L93 Difference]: Finished difference Result 85235 states and 132380 transitions. [2022-07-22 18:06:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:06:12,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-07-22 18:06:12,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:06:12,889 INFO L225 Difference]: With dead ends: 85235 [2022-07-22 18:06:12,890 INFO L226 Difference]: Without dead ends: 67849 [2022-07-22 18:06:12,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:06:12,920 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 216 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:06:12,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 632 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:06:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67849 states. [2022-07-22 18:06:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67849 to 66149. [2022-07-22 18:06:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66149 states, 66148 states have (on average 1.5457005502811876) internal successors, (102245), 66148 states have internal predecessors, (102245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66149 states to 66149 states and 102245 transitions. [2022-07-22 18:06:15,731 INFO L78 Accepts]: Start accepts. Automaton has 66149 states and 102245 transitions. Word has length 102 [2022-07-22 18:06:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:06:15,732 INFO L495 AbstractCegarLoop]: Abstraction has 66149 states and 102245 transitions. [2022-07-22 18:06:15,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 66149 states and 102245 transitions. [2022-07-22 18:06:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 18:06:15,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:06:15,734 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:06:15,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 18:06:15,735 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:06:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:06:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash 692431096, now seen corresponding path program 1 times [2022-07-22 18:06:15,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:06:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925765440] [2022-07-22 18:06:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:06:15,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:06:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:06:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 18:06:15,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:06:15,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925765440] [2022-07-22 18:06:15,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925765440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:06:15,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:06:15,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:06:15,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344349794] [2022-07-22 18:06:15,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:06:15,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:06:15,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:06:15,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:06:15,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:06:15,770 INFO L87 Difference]: Start difference. First operand 66149 states and 102245 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:06:19,808 INFO L93 Difference]: Finished difference Result 143003 states and 221693 transitions. [2022-07-22 18:06:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:06:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-07-22 18:06:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:06:20,011 INFO L225 Difference]: With dead ends: 143003 [2022-07-22 18:06:20,011 INFO L226 Difference]: Without dead ends: 111837 [2022-07-22 18:06:20,046 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 [2022-07-22 18:06:20,047 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 92 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:06:20,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 373 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:06:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111837 states. [2022-07-22 18:06:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111837 to 111559. [2022-07-22 18:06:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111559 states, 111558 states have (on average 1.5450617615948654) internal successors, (172364), 111558 states have internal predecessors, (172364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111559 states to 111559 states and 172364 transitions. [2022-07-22 18:06:24,827 INFO L78 Accepts]: Start accepts. Automaton has 111559 states and 172364 transitions. Word has length 102 [2022-07-22 18:06:24,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:06:24,827 INFO L495 AbstractCegarLoop]: Abstraction has 111559 states and 172364 transitions. [2022-07-22 18:06:24,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:06:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 111559 states and 172364 transitions. [2022-07-22 18:06:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-22 18:06:24,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:06:24,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:06:24,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 18:06:24,830 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:06:24,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:06:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1579286360, now seen corresponding path program 1 times [2022-07-22 18:06:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:06:24,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617802394] [2022-07-22 18:06:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:06:24,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:06:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:06:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:06:24,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:06:24,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617802394] [2022-07-22 18:06:24,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617802394] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:06:24,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:06:24,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:06:24,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214384083] [2022-07-22 18:06:24,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:06:24,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:06:24,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:06:24,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:06:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:06:24,857 INFO L87 Difference]: Start difference. First operand 111559 states and 172364 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)