./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem15_label13.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 5a19424d0456c6718774c0e7f98c7314f15d1f859d3e4c4b58b43cec62bc198b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:27:36,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:27:36,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:27:36,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:27:36,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:27:36,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:27:36,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:27:36,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:27:36,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:27:36,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:27:36,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:27:36,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:27:36,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:27:36,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:27:36,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:27:36,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:27:36,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:27:36,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:27:36,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:27:36,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:27:36,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:27:36,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:27:36,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:27:36,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:27:36,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:27:36,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:27:36,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:27:36,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:27:36,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:27:36,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:27:36,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:27:36,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:27:36,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:27:36,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:27:36,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:27:36,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:27:36,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:27:36,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:27:36,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:27:36,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:27:36,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:27:36,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:27:36,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:27:36,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:27:36,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:27:36,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:27:36,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:27:36,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:27:36,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:27:36,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:27:36,953 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:27:36,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:27:36,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:27:36,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:27:36,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:27:36,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:27:36,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:27:36,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:27:36,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:27:36,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:27:36,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:27:36,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:27:36,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:27:36,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:27:36,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:27:36,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:27:36,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:27:36,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:27:36,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:27:36,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:27:36,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:27:36,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:27:36,957 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:27:36,958 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:27:36,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:27:36,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:27:36,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a19424d0456c6718774c0e7f98c7314f15d1f859d3e4c4b58b43cec62bc198b [2021-12-22 09:27:37,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:27:37,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:27:37,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:27:37,185 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:27:37,185 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:27:37,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label13.c [2021-12-22 09:27:37,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff52cebb1/025bb2ebad3144b29aef3c61e3dd9f54/FLAG1d354b5c5 [2021-12-22 09:27:37,726 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:27:37,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label13.c [2021-12-22 09:27:37,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff52cebb1/025bb2ebad3144b29aef3c61e3dd9f54/FLAG1d354b5c5 [2021-12-22 09:27:38,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff52cebb1/025bb2ebad3144b29aef3c61e3dd9f54 [2021-12-22 09:27:38,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:27:38,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:27:38,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:27:38,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:27:38,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:27:38,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3487461e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38, skipping insertion in model container [2021-12-22 09:27:38,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:27:38,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:27:38,454 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label13.c[5940,5953] [2021-12-22 09:27:38,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:27:38,767 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:27:38,800 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label13.c[5940,5953] [2021-12-22 09:27:38,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:27:38,952 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:27:38,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38 WrapperNode [2021-12-22 09:27:38,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:27:38,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:27:38,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:27:38,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:27:38,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:39,105 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-22 09:27:39,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:27:39,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:27:39,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:27:39,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:27:39,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:39,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:39,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:39,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:39,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:39,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:39,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:39,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:27:39,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:27:39,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:27:39,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:27:39,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:39,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:27:39,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:39,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 09:27:39,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 09:27:39,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:27:39,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:27:39,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:27:39,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:27:39,390 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:27:39,391 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:27:41,379 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:27:41,387 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:27:41,387 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:27:41,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:27:41 BoogieIcfgContainer [2021-12-22 09:27:41,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:27:41,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:27:41,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:27:41,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:27:41,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:27:38" (1/3) ... [2021-12-22 09:27:41,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e45fa07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:27:41, skipping insertion in model container [2021-12-22 09:27:41,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (2/3) ... [2021-12-22 09:27:41,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e45fa07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:27:41, skipping insertion in model container [2021-12-22 09:27:41,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:27:41" (3/3) ... [2021-12-22 09:27:41,394 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label13.c [2021-12-22 09:27:41,398 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:27:41,398 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:27:41,429 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:27:41,433 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 09:27:41,433 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:27:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 09:27:41,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:41,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:41,453 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:41,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:41,457 INFO L85 PathProgramCache]: Analyzing trace with hash 563919826, now seen corresponding path program 1 times [2021-12-22 09:27:41,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:41,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795050977] [2021-12-22 09:27:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:41,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:41,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:41,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795050977] [2021-12-22 09:27:41,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795050977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:41,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:41,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:41,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000481335] [2021-12-22 09:27:41,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:41,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:41,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:41,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:41,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:41,621 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:43,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:43,118 INFO L93 Difference]: Finished difference Result 1155 states and 2106 transitions. [2021-12-22 09:27:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:43,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-12-22 09:27:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:43,130 INFO L225 Difference]: With dead ends: 1155 [2021-12-22 09:27:43,130 INFO L226 Difference]: Without dead ends: 667 [2021-12-22 09:27:43,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:43,139 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 296 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:43,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 371 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:27:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-12-22 09:27:43,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 665. [2021-12-22 09:27:43,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.4789156626506024) internal successors, (982), 664 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 982 transitions. [2021-12-22 09:27:43,201 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 982 transitions. Word has length 48 [2021-12-22 09:27:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:43,204 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 982 transitions. [2021-12-22 09:27:43,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 982 transitions. [2021-12-22 09:27:43,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-22 09:27:43,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:43,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:43,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:27:43,208 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:43,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:43,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1552038125, now seen corresponding path program 1 times [2021-12-22 09:27:43,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:43,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302134178] [2021-12-22 09:27:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:43,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:43,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:43,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302134178] [2021-12-22 09:27:43,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302134178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:43,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:43,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:43,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937454994] [2021-12-22 09:27:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:43,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:43,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:43,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:43,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:43,291 INFO L87 Difference]: Start difference. First operand 665 states and 982 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:45,115 INFO L93 Difference]: Finished difference Result 1953 states and 2893 transitions. [2021-12-22 09:27:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-12-22 09:27:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:45,120 INFO L225 Difference]: With dead ends: 1953 [2021-12-22 09:27:45,120 INFO L226 Difference]: Without dead ends: 1290 [2021-12-22 09:27:45,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:45,122 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 256 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:45,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 326 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-22 09:27:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-12-22 09:27:45,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1282. [2021-12-22 09:27:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.3981264637002342) internal successors, (1791), 1281 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1791 transitions. [2021-12-22 09:27:45,172 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1791 transitions. Word has length 123 [2021-12-22 09:27:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:45,175 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1791 transitions. [2021-12-22 09:27:45,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1791 transitions. [2021-12-22 09:27:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-22 09:27:45,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:45,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:45,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:27:45,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:45,182 INFO L85 PathProgramCache]: Analyzing trace with hash 2128009123, now seen corresponding path program 1 times [2021-12-22 09:27:45,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:45,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764997131] [2021-12-22 09:27:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:45,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:45,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:45,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764997131] [2021-12-22 09:27:45,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764997131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:45,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:45,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:45,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028413284] [2021-12-22 09:27:45,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:45,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:45,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:45,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:45,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:45,398 INFO L87 Difference]: Start difference. First operand 1282 states and 1791 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:47,110 INFO L93 Difference]: Finished difference Result 3764 states and 5260 transitions. [2021-12-22 09:27:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:47,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-12-22 09:27:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:47,117 INFO L225 Difference]: With dead ends: 3764 [2021-12-22 09:27:47,117 INFO L226 Difference]: Without dead ends: 2484 [2021-12-22 09:27:47,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:47,120 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 236 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:47,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 366 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-22 09:27:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-12-22 09:27:47,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2182. [2021-12-22 09:27:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 1.2810637322329206) internal successors, (2794), 2181 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 2794 transitions. [2021-12-22 09:27:47,165 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 2794 transitions. Word has length 127 [2021-12-22 09:27:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:47,166 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 2794 transitions. [2021-12-22 09:27:47,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 2794 transitions. [2021-12-22 09:27:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-22 09:27:47,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:47,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:47,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:27:47,172 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:47,172 INFO L85 PathProgramCache]: Analyzing trace with hash -556771401, now seen corresponding path program 1 times [2021-12-22 09:27:47,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:47,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937788637] [2021-12-22 09:27:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:47,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 09:27:47,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:47,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937788637] [2021-12-22 09:27:47,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937788637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:47,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:47,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:47,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525201106] [2021-12-22 09:27:47,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:47,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:47,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:47,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:47,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:47,331 INFO L87 Difference]: Start difference. First operand 2182 states and 2794 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:48,410 INFO L93 Difference]: Finished difference Result 6166 states and 7958 transitions. [2021-12-22 09:27:48,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:48,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 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 218 [2021-12-22 09:27:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:48,420 INFO L225 Difference]: With dead ends: 6166 [2021-12-22 09:27:48,420 INFO L226 Difference]: Without dead ends: 3986 [2021-12-22 09:27:48,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:48,442 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:48,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 09:27:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-12-22 09:27:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3682. [2021-12-22 09:27:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.219505569138821) internal successors, (4489), 3681 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4489 transitions. [2021-12-22 09:27:48,540 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4489 transitions. Word has length 218 [2021-12-22 09:27:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:48,541 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4489 transitions. [2021-12-22 09:27:48,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4489 transitions. [2021-12-22 09:27:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-12-22 09:27:48,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:48,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:48,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:27:48,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1996023235, now seen corresponding path program 1 times [2021-12-22 09:27:48,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:48,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134764300] [2021-12-22 09:27:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:48,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-22 09:27:48,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:48,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134764300] [2021-12-22 09:27:48,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134764300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:48,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:48,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:48,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168398979] [2021-12-22 09:27:48,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:48,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:48,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:48,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:48,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:48,691 INFO L87 Difference]: Start difference. First operand 3682 states and 4489 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:49,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:49,978 INFO L93 Difference]: Finished difference Result 7661 states and 9287 transitions. [2021-12-22 09:27:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 320 [2021-12-22 09:27:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:49,998 INFO L225 Difference]: With dead ends: 7661 [2021-12-22 09:27:49,998 INFO L226 Difference]: Without dead ends: 3981 [2021-12-22 09:27:50,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:50,005 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:50,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:27:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-12-22 09:27:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3981. [2021-12-22 09:27:50,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3980 states have (on average 1.2045226130653266) internal successors, (4794), 3980 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 4794 transitions. [2021-12-22 09:27:50,054 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 4794 transitions. Word has length 320 [2021-12-22 09:27:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:50,055 INFO L470 AbstractCegarLoop]: Abstraction has 3981 states and 4794 transitions. [2021-12-22 09:27:50,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 4794 transitions. [2021-12-22 09:27:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-12-22 09:27:50,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:50,061 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:50,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:27:50,061 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:50,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2113612274, now seen corresponding path program 1 times [2021-12-22 09:27:50,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:50,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173929750] [2021-12-22 09:27:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:50,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:27:50,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:50,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173929750] [2021-12-22 09:27:50,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173929750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:50,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:50,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:50,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43732686] [2021-12-22 09:27:50,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:50,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:50,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:50,182 INFO L87 Difference]: Start difference. First operand 3981 states and 4794 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:51,530 INFO L93 Difference]: Finished difference Result 9465 states and 11668 transitions. [2021-12-22 09:27:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:51,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 335 [2021-12-22 09:27:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:51,544 INFO L225 Difference]: With dead ends: 9465 [2021-12-22 09:27:51,544 INFO L226 Difference]: Without dead ends: 5785 [2021-12-22 09:27:51,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:51,549 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 268 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:51,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 671 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:27:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5785 states. [2021-12-22 09:27:51,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5785 to 5783. [2021-12-22 09:27:51,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 1.1672431684538223) internal successors, (6749), 5782 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 6749 transitions. [2021-12-22 09:27:51,609 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 6749 transitions. Word has length 335 [2021-12-22 09:27:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:51,610 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 6749 transitions. [2021-12-22 09:27:51,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 6749 transitions. [2021-12-22 09:27:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-12-22 09:27:51,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:51,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:51,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:27:51,614 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:51,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1950480271, now seen corresponding path program 1 times [2021-12-22 09:27:51,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:51,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754816812] [2021-12-22 09:27:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:51,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 91 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:51,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:51,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754816812] [2021-12-22 09:27:51,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754816812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:27:51,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654769027] [2021-12-22 09:27:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:51,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:51,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:51,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:27:51,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:27:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:52,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:27:52,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:27:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:52,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:27:52,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654769027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:52,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:27:52,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-22 09:27:52,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719585851] [2021-12-22 09:27:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:52,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:52,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:52,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:52,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:27:52,617 INFO L87 Difference]: Start difference. First operand 5783 states and 6749 transitions. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:53,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:53,904 INFO L93 Difference]: Finished difference Result 13366 states and 15911 transitions. [2021-12-22 09:27:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:53,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 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 394 [2021-12-22 09:27:53,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:53,923 INFO L225 Difference]: With dead ends: 13366 [2021-12-22 09:27:53,924 INFO L226 Difference]: Without dead ends: 7884 [2021-12-22 09:27:53,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:27:53,929 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 274 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:53,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 263 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:27:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7884 states. [2021-12-22 09:27:53,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7884 to 7281. [2021-12-22 09:27:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 1.161401098901099) internal successors, (8455), 7280 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 8455 transitions. [2021-12-22 09:27:54,018 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 8455 transitions. Word has length 394 [2021-12-22 09:27:54,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:54,019 INFO L470 AbstractCegarLoop]: Abstraction has 7281 states and 8455 transitions. [2021-12-22 09:27:54,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:54,019 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 8455 transitions. [2021-12-22 09:27:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-12-22 09:27:54,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:54,025 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:54,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:27:54,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:54,243 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1301001739, now seen corresponding path program 1 times [2021-12-22 09:27:54,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:54,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738230759] [2021-12-22 09:27:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:54,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-12-22 09:27:54,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:54,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738230759] [2021-12-22 09:27:54,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738230759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:54,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:54,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:54,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754070726] [2021-12-22 09:27:54,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:54,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:54,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:54,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:54,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:54,398 INFO L87 Difference]: Start difference. First operand 7281 states and 8455 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:55,605 INFO L93 Difference]: Finished difference Result 16059 states and 18979 transitions. [2021-12-22 09:27:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:55,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 499 [2021-12-22 09:27:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:55,626 INFO L225 Difference]: With dead ends: 16059 [2021-12-22 09:27:55,626 INFO L226 Difference]: Without dead ends: 9079 [2021-12-22 09:27:55,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:55,640 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 283 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:55,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 611 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:27:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9079 states. [2021-12-22 09:27:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9079 to 9078. [2021-12-22 09:27:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9078 states, 9077 states have (on average 1.1450919907458412) internal successors, (10394), 9077 states have internal predecessors, (10394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9078 states to 9078 states and 10394 transitions. [2021-12-22 09:27:55,733 INFO L78 Accepts]: Start accepts. Automaton has 9078 states and 10394 transitions. Word has length 499 [2021-12-22 09:27:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:55,733 INFO L470 AbstractCegarLoop]: Abstraction has 9078 states and 10394 transitions. [2021-12-22 09:27:55,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 9078 states and 10394 transitions. [2021-12-22 09:27:55,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2021-12-22 09:27:55,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:55,742 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:55,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:27:55,742 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:55,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1580672086, now seen corresponding path program 1 times [2021-12-22 09:27:55,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:55,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705448743] [2021-12-22 09:27:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:55,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 421 proven. 39 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-22 09:27:55,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:55,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705448743] [2021-12-22 09:27:55,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705448743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:27:55,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136514340] [2021-12-22 09:27:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:55,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:55,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:55,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:27:55,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:27:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:56,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:27:56,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:27:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-22 09:27:56,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:27:56,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136514340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:56,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:27:56,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:27:56,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904391939] [2021-12-22 09:27:56,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:56,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:56,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:56,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:27:56,742 INFO L87 Difference]: Start difference. First operand 9078 states and 10394 transitions. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:58,347 INFO L93 Difference]: Finished difference Result 20546 states and 23798 transitions. [2021-12-22 09:27:58,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:58,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 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 524 [2021-12-22 09:27:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:58,367 INFO L225 Difference]: With dead ends: 20546 [2021-12-22 09:27:58,368 INFO L226 Difference]: Without dead ends: 11769 [2021-12-22 09:27:58,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:27:58,374 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 123 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:58,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 315 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:27:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11769 states. [2021-12-22 09:27:58,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11769 to 7577. [2021-12-22 09:27:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 1.1601108764519534) internal successors, (8789), 7576 states have internal predecessors, (8789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 8789 transitions. [2021-12-22 09:27:58,455 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 8789 transitions. Word has length 524 [2021-12-22 09:27:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:58,456 INFO L470 AbstractCegarLoop]: Abstraction has 7577 states and 8789 transitions. [2021-12-22 09:27:58,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 8789 transitions. [2021-12-22 09:27:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-12-22 09:27:58,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:58,461 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:27:58,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:27:58,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-22 09:27:58,676 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:58,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1485269488, now seen corresponding path program 1 times [2021-12-22 09:27:58,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:58,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512831999] [2021-12-22 09:27:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:58,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 547 proven. 39 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-22 09:27:58,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:58,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512831999] [2021-12-22 09:27:58,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512831999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:27:58,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395383200] [2021-12-22 09:27:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:58,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:58,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:58,880 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:27:58,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 09:27:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:59,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 09:27:59,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 547 proven. 39 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-22 09:28:00,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:28:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 547 proven. 39 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-22 09:28:02,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395383200] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:28:02,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:28:02,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-22 09:28:02,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786832180] [2021-12-22 09:28:02,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:28:02,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 09:28:02,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:02,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 09:28:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:28:02,111 INFO L87 Difference]: Start difference. First operand 7577 states and 8789 transitions. Second operand has 9 states, 9 states have (on average 82.55555555555556) internal successors, (743), 8 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:06,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:06,863 INFO L93 Difference]: Finished difference Result 21393 states and 24692 transitions. [2021-12-22 09:28:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 09:28:06,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 82.55555555555556) internal successors, (743), 8 states have internal predecessors, (743), 0 states have call successors, (0), 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 575 [2021-12-22 09:28:06,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:06,885 INFO L225 Difference]: With dead ends: 21393 [2021-12-22 09:28:06,885 INFO L226 Difference]: Without dead ends: 9671 [2021-12-22 09:28:06,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1159 GetRequests, 1144 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-22 09:28:06,893 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 3100 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 5255 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3100 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 5976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 5255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:06,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3100 Valid, 243 Invalid, 5976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 5255 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-22 09:28:06,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9671 states. [2021-12-22 09:28:06,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9671 to 9369. [2021-12-22 09:28:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9369 states, 9368 states have (on average 1.0763236549957302) internal successors, (10083), 9368 states have internal predecessors, (10083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9369 states to 9369 states and 10083 transitions. [2021-12-22 09:28:06,982 INFO L78 Accepts]: Start accepts. Automaton has 9369 states and 10083 transitions. Word has length 575 [2021-12-22 09:28:06,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:06,983 INFO L470 AbstractCegarLoop]: Abstraction has 9369 states and 10083 transitions. [2021-12-22 09:28:06,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 82.55555555555556) internal successors, (743), 8 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:06,983 INFO L276 IsEmpty]: Start isEmpty. Operand 9369 states and 10083 transitions. [2021-12-22 09:28:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-12-22 09:28:06,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:06,988 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:07,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 09:28:07,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:07,206 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:07,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:07,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2131564190, now seen corresponding path program 1 times [2021-12-22 09:28:07,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:07,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562868803] [2021-12-22 09:28:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:07,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-12-22 09:28:07,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:07,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562868803] [2021-12-22 09:28:07,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562868803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:07,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:07,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:07,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622939836] [2021-12-22 09:28:07,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:07,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:07,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:07,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:07,390 INFO L87 Difference]: Start difference. First operand 9369 states and 10083 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:08,330 INFO L93 Difference]: Finished difference Result 21153 states and 22828 transitions. [2021-12-22 09:28:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:08,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 575 [2021-12-22 09:28:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:08,344 INFO L225 Difference]: With dead ends: 21153 [2021-12-22 09:28:08,345 INFO L226 Difference]: Without dead ends: 12085 [2021-12-22 09:28:08,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:08,354 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 289 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:08,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 219 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:28:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12085 states. [2021-12-22 09:28:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12085 to 9371. [2021-12-22 09:28:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9371 states, 9370 states have (on average 1.075453575240128) internal successors, (10077), 9370 states have internal predecessors, (10077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9371 states to 9371 states and 10077 transitions. [2021-12-22 09:28:08,460 INFO L78 Accepts]: Start accepts. Automaton has 9371 states and 10077 transitions. Word has length 575 [2021-12-22 09:28:08,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:08,461 INFO L470 AbstractCegarLoop]: Abstraction has 9371 states and 10077 transitions. [2021-12-22 09:28:08,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:08,461 INFO L276 IsEmpty]: Start isEmpty. Operand 9371 states and 10077 transitions. [2021-12-22 09:28:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2021-12-22 09:28:08,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:08,467 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:08,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:28:08,467 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:08,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:08,468 INFO L85 PathProgramCache]: Analyzing trace with hash 194348831, now seen corresponding path program 1 times [2021-12-22 09:28:08,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:08,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610750557] [2021-12-22 09:28:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:08,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 242 proven. 188 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-22 09:28:08,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:08,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610750557] [2021-12-22 09:28:08,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610750557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:08,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484842826] [2021-12-22 09:28:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:08,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:08,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:28:08,709 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:28:08,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 09:28:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:28:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-22 09:28:09,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:28:09,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484842826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:09,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:28:09,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:28:09,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033113523] [2021-12-22 09:28:09,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:09,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:28:09,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:09,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:28:09,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:28:09,899 INFO L87 Difference]: Start difference. First operand 9371 states and 10077 transitions. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:11,294 INFO L93 Difference]: Finished difference Result 28684 states and 30918 transitions. [2021-12-22 09:28:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:28:11,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 583 [2021-12-22 09:28:11,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:11,313 INFO L225 Difference]: With dead ends: 28684 [2021-12-22 09:28:11,314 INFO L226 Difference]: Without dead ends: 19614 [2021-12-22 09:28:11,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:28:11,322 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 519 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:11,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 171 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:28:11,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19614 states. [2021-12-22 09:28:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19614 to 16316. [2021-12-22 09:28:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16316 states, 16315 states have (on average 1.0734906527735213) internal successors, (17514), 16315 states have internal predecessors, (17514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16316 states to 16316 states and 17514 transitions. [2021-12-22 09:28:11,491 INFO L78 Accepts]: Start accepts. Automaton has 16316 states and 17514 transitions. Word has length 583 [2021-12-22 09:28:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:11,492 INFO L470 AbstractCegarLoop]: Abstraction has 16316 states and 17514 transitions. [2021-12-22 09:28:11,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 16316 states and 17514 transitions. [2021-12-22 09:28:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2021-12-22 09:28:11,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:11,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:11,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 09:28:11,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:11,716 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:11,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:11,716 INFO L85 PathProgramCache]: Analyzing trace with hash -964489000, now seen corresponding path program 1 times [2021-12-22 09:28:11,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:11,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992290178] [2021-12-22 09:28:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:11,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-12-22 09:28:11,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:11,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992290178] [2021-12-22 09:28:11,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992290178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:11,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:11,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:11,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655362629] [2021-12-22 09:28:11,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:11,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:11,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:11,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:11,886 INFO L87 Difference]: Start difference. First operand 16316 states and 17514 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:12,958 INFO L93 Difference]: Finished difference Result 39203 states and 42226 transitions. [2021-12-22 09:28:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:12,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 586 [2021-12-22 09:28:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:12,999 INFO L225 Difference]: With dead ends: 39203 [2021-12-22 09:28:13,000 INFO L226 Difference]: Without dead ends: 24088 [2021-12-22 09:28:13,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:13,011 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 303 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:13,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 160 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:28:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24088 states. [2021-12-22 09:28:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24088 to 22892. [2021-12-22 09:28:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22892 states, 22891 states have (on average 1.067275348390197) internal successors, (24431), 22891 states have internal predecessors, (24431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22892 states to 22892 states and 24431 transitions. [2021-12-22 09:28:13,213 INFO L78 Accepts]: Start accepts. Automaton has 22892 states and 24431 transitions. Word has length 586 [2021-12-22 09:28:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:13,214 INFO L470 AbstractCegarLoop]: Abstraction has 22892 states and 24431 transitions. [2021-12-22 09:28:13,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:13,214 INFO L276 IsEmpty]: Start isEmpty. Operand 22892 states and 24431 transitions. [2021-12-22 09:28:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2021-12-22 09:28:13,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:13,226 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:13,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:28:13,227 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:13,227 INFO L85 PathProgramCache]: Analyzing trace with hash -223845267, now seen corresponding path program 1 times [2021-12-22 09:28:13,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:13,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882833928] [2021-12-22 09:28:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:13,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 657 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-12-22 09:28:13,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:13,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882833928] [2021-12-22 09:28:13,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882833928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:13,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:13,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:13,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884772296] [2021-12-22 09:28:13,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:13,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:13,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:13,466 INFO L87 Difference]: Start difference. First operand 22892 states and 24431 transitions. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:14,352 INFO L93 Difference]: Finished difference Result 44581 states and 47652 transitions. [2021-12-22 09:28:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 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 723 [2021-12-22 09:28:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:14,373 INFO L225 Difference]: With dead ends: 44581 [2021-12-22 09:28:14,374 INFO L226 Difference]: Without dead ends: 23189 [2021-12-22 09:28:14,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:14,388 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 438 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:14,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 70 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:28:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23189 states. [2021-12-22 09:28:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23189 to 22890. [2021-12-22 09:28:14,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22890 states, 22889 states have (on average 1.06710647035694) internal successors, (24425), 22889 states have internal predecessors, (24425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22890 states to 22890 states and 24425 transitions. [2021-12-22 09:28:14,603 INFO L78 Accepts]: Start accepts. Automaton has 22890 states and 24425 transitions. Word has length 723 [2021-12-22 09:28:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:14,604 INFO L470 AbstractCegarLoop]: Abstraction has 22890 states and 24425 transitions. [2021-12-22 09:28:14,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 22890 states and 24425 transitions. [2021-12-22 09:28:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2021-12-22 09:28:14,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:14,663 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:14,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 09:28:14,663 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash -539156564, now seen corresponding path program 1 times [2021-12-22 09:28:14,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:14,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589072079] [2021-12-22 09:28:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:14,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 816 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 09:28:14,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:14,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589072079] [2021-12-22 09:28:14,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589072079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:14,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:14,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:28:14,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027305415] [2021-12-22 09:28:14,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:14,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:28:14,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:14,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:28:14,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:28:14,905 INFO L87 Difference]: Start difference. First operand 22890 states and 24425 transitions. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:16,122 INFO L93 Difference]: Finished difference Result 50571 states and 54008 transitions. [2021-12-22 09:28:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:28:16,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 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 737 [2021-12-22 09:28:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:16,152 INFO L225 Difference]: With dead ends: 50571 [2021-12-22 09:28:16,152 INFO L226 Difference]: Without dead ends: 29181 [2021-12-22 09:28:16,169 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:28:16,170 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 633 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:16,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 422 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:28:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29181 states. [2021-12-22 09:28:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29181 to 27983. [2021-12-22 09:28:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27983 states, 27982 states have (on average 1.0520691873347152) internal successors, (29439), 27982 states have internal predecessors, (29439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27983 states to 27983 states and 29439 transitions. [2021-12-22 09:28:16,479 INFO L78 Accepts]: Start accepts. Automaton has 27983 states and 29439 transitions. Word has length 737 [2021-12-22 09:28:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:16,479 INFO L470 AbstractCegarLoop]: Abstraction has 27983 states and 29439 transitions. [2021-12-22 09:28:16,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 27983 states and 29439 transitions. [2021-12-22 09:28:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 758 [2021-12-22 09:28:16,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:16,492 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:16,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 09:28:16,492 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash -575651241, now seen corresponding path program 1 times [2021-12-22 09:28:16,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:16,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705180434] [2021-12-22 09:28:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:16,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 757 proven. 0 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-12-22 09:28:16,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:16,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705180434] [2021-12-22 09:28:16,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705180434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:16,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:16,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:16,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489898339] [2021-12-22 09:28:16,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:16,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:16,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:16,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:16,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:16,665 INFO L87 Difference]: Start difference. First operand 27983 states and 29439 transitions. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:17,740 INFO L93 Difference]: Finished difference Result 55665 states and 58575 transitions. [2021-12-22 09:28:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:17,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 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 757 [2021-12-22 09:28:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:17,771 INFO L225 Difference]: With dead ends: 55665 [2021-12-22 09:28:17,771 INFO L226 Difference]: Without dead ends: 27983 [2021-12-22 09:28:17,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:17,788 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 226 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:17,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 511 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:28:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27983 states. [2021-12-22 09:28:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27983 to 27983. [2021-12-22 09:28:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27983 states, 27982 states have (on average 1.0344864555785862) internal successors, (28947), 27982 states have internal predecessors, (28947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27983 states to 27983 states and 28947 transitions. [2021-12-22 09:28:18,187 INFO L78 Accepts]: Start accepts. Automaton has 27983 states and 28947 transitions. Word has length 757 [2021-12-22 09:28:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:18,188 INFO L470 AbstractCegarLoop]: Abstraction has 27983 states and 28947 transitions. [2021-12-22 09:28:18,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 27983 states and 28947 transitions. [2021-12-22 09:28:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2021-12-22 09:28:18,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:18,203 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:18,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 09:28:18,204 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:18,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:18,205 INFO L85 PathProgramCache]: Analyzing trace with hash 775079435, now seen corresponding path program 1 times [2021-12-22 09:28:18,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:18,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099141204] [2021-12-22 09:28:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:18,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-12-22 09:28:18,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:18,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099141204] [2021-12-22 09:28:18,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099141204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:18,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:18,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:18,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959841376] [2021-12-22 09:28:18,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:18,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:18,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:18,449 INFO L87 Difference]: Start difference. First operand 27983 states and 28947 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:19,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:19,356 INFO L93 Difference]: Finished difference Result 56256 states and 58223 transitions. [2021-12-22 09:28:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:19,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 759 [2021-12-22 09:28:19,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:19,387 INFO L225 Difference]: With dead ends: 56256 [2021-12-22 09:28:19,387 INFO L226 Difference]: Without dead ends: 29773 [2021-12-22 09:28:19,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:19,402 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 358 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:19,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 431 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:28:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29773 states. [2021-12-22 09:28:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29773 to 15949. [2021-12-22 09:28:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15949 states, 15948 states have (on average 1.0338600451467268) internal successors, (16488), 15948 states have internal predecessors, (16488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15949 states to 15949 states and 16488 transitions. [2021-12-22 09:28:19,659 INFO L78 Accepts]: Start accepts. Automaton has 15949 states and 16488 transitions. Word has length 759 [2021-12-22 09:28:19,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:19,660 INFO L470 AbstractCegarLoop]: Abstraction has 15949 states and 16488 transitions. [2021-12-22 09:28:19,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:19,661 INFO L276 IsEmpty]: Start isEmpty. Operand 15949 states and 16488 transitions. [2021-12-22 09:28:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2021-12-22 09:28:19,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:19,670 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:19,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 09:28:19,670 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1217431788, now seen corresponding path program 1 times [2021-12-22 09:28:19,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:19,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310194227] [2021-12-22 09:28:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:19,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 621 proven. 188 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-22 09:28:19,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:19,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310194227] [2021-12-22 09:28:19,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310194227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:19,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865168365] [2021-12-22 09:28:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:19,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:19,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:28:19,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:28:19,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 09:28:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 09:28:20,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 713 proven. 76 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-22 09:28:21,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:28:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 638 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-22 09:28:23,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865168365] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:23,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 09:28:23,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-12-22 09:28:23,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236287007] [2021-12-22 09:28:23,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:23,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:23,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:23,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:23,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:28:23,715 INFO L87 Difference]: Start difference. First operand 15949 states and 16488 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:24,653 INFO L93 Difference]: Finished difference Result 34592 states and 35751 transitions. [2021-12-22 09:28:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:24,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 774 [2021-12-22 09:28:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:24,672 INFO L225 Difference]: With dead ends: 34592 [2021-12-22 09:28:24,672 INFO L226 Difference]: Without dead ends: 18944 [2021-12-22 09:28:24,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1550 GetRequests, 1544 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:28:24,684 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 160 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:24,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 91 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:28:24,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18944 states. [2021-12-22 09:28:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18944 to 17743. [2021-12-22 09:28:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 1.0322398827640626) internal successors, (18314), 17742 states have internal predecessors, (18314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 18314 transitions. [2021-12-22 09:28:24,915 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 18314 transitions. Word has length 774 [2021-12-22 09:28:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:24,915 INFO L470 AbstractCegarLoop]: Abstraction has 17743 states and 18314 transitions. [2021-12-22 09:28:24,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 18314 transitions. [2021-12-22 09:28:24,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2021-12-22 09:28:24,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:24,926 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:24,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 09:28:25,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 09:28:25,140 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash 121556206, now seen corresponding path program 1 times [2021-12-22 09:28:25,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:25,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371068988] [2021-12-22 09:28:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:25,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 650 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-12-22 09:28:25,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:25,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371068988] [2021-12-22 09:28:25,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371068988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:25,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:25,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:28:25,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448042428] [2021-12-22 09:28:25,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:25,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:28:25,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:25,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:28:25,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:28:25,356 INFO L87 Difference]: Start difference. First operand 17743 states and 18314 transitions. Second operand has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:26,901 INFO L93 Difference]: Finished difference Result 40592 states and 41899 transitions. [2021-12-22 09:28:26,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:28:26,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 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 786 [2021-12-22 09:28:26,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:26,923 INFO L225 Difference]: With dead ends: 40592 [2021-12-22 09:28:26,923 INFO L226 Difference]: Without dead ends: 22851 [2021-12-22 09:28:26,935 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:28:26,935 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 431 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:26,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 145 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:28:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22851 states. [2021-12-22 09:28:27,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22851 to 21336. [2021-12-22 09:28:27,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21336 states, 21335 states have (on average 1.0300913991094445) internal successors, (21977), 21335 states have internal predecessors, (21977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:27,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21336 states to 21336 states and 21977 transitions. [2021-12-22 09:28:27,218 INFO L78 Accepts]: Start accepts. Automaton has 21336 states and 21977 transitions. Word has length 786 [2021-12-22 09:28:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:27,219 INFO L470 AbstractCegarLoop]: Abstraction has 21336 states and 21977 transitions. [2021-12-22 09:28:27,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:27,220 INFO L276 IsEmpty]: Start isEmpty. Operand 21336 states and 21977 transitions. [2021-12-22 09:28:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2021-12-22 09:28:27,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:27,238 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:27,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 09:28:27,238 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:27,239 INFO L85 PathProgramCache]: Analyzing trace with hash 480283110, now seen corresponding path program 1 times [2021-12-22 09:28:27,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:27,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681866115] [2021-12-22 09:28:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:27,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 1022 proven. 443 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-22 09:28:27,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:27,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681866115] [2021-12-22 09:28:27,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681866115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:27,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161919881] [2021-12-22 09:28:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:27,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:27,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:28:27,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:28:27,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 09:28:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:27,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:28:27,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 1238 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 09:28:28,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:28:28,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161919881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:28,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:28:28,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 09:28:28,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070127268] [2021-12-22 09:28:28,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:28,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:28,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:28,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:28,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:28:28,629 INFO L87 Difference]: Start difference. First operand 21336 states and 21977 transitions. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:29,554 INFO L93 Difference]: Finished difference Result 42074 states and 43352 transitions. [2021-12-22 09:28:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:29,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 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 957 [2021-12-22 09:28:29,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:29,575 INFO L225 Difference]: With dead ends: 42074 [2021-12-22 09:28:29,576 INFO L226 Difference]: Without dead ends: 21039 [2021-12-22 09:28:29,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 957 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:28:29,586 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 161 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:29,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 397 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:28:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21039 states. [2021-12-22 09:28:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21039 to 20735. [2021-12-22 09:28:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20735 states, 20734 states have (on average 1.0282145268640879) internal successors, (21319), 20734 states have internal predecessors, (21319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20735 states to 20735 states and 21319 transitions. [2021-12-22 09:28:29,766 INFO L78 Accepts]: Start accepts. Automaton has 20735 states and 21319 transitions. Word has length 957 [2021-12-22 09:28:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:29,767 INFO L470 AbstractCegarLoop]: Abstraction has 20735 states and 21319 transitions. [2021-12-22 09:28:29,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 20735 states and 21319 transitions. [2021-12-22 09:28:29,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1033 [2021-12-22 09:28:29,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:29,786 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:29,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 09:28:30,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:30,005 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:30,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:30,005 INFO L85 PathProgramCache]: Analyzing trace with hash 812749798, now seen corresponding path program 1 times [2021-12-22 09:28:30,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:30,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538082696] [2021-12-22 09:28:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:30,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 1150 proven. 187 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-22 09:28:30,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:30,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538082696] [2021-12-22 09:28:30,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538082696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:30,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651958812] [2021-12-22 09:28:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:30,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:30,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:28:30,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:28:30,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 09:28:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:30,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 09:28:30,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 793 proven. 46 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2021-12-22 09:28:32,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:28:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 793 proven. 46 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2021-12-22 09:28:33,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651958812] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:28:33,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:28:33,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2021-12-22 09:28:33,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805183005] [2021-12-22 09:28:33,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:28:33,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 09:28:33,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:33,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 09:28:33,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-22 09:28:33,370 INFO L87 Difference]: Start difference. First operand 20735 states and 21319 transitions. Second operand has 12 states, 12 states have (on average 109.08333333333333) internal successors, (1309), 12 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)