./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label43.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label43.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 009b18d49acf284b9866fb4283bf61c04b940d5d5b8f73fcface32bff3af3727 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:33:05,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:33:05,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:33:05,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:33:05,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:33:05,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:33:05,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:33:05,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:33:05,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:33:05,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:33:05,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:33:05,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:33:05,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:33:05,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:33:05,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:33:05,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:33:05,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:33:05,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:33:05,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:33:05,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:33:05,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:33:05,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:33:05,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:33:05,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:33:05,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:33:05,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:33:05,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:33:05,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:33:05,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:33:05,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:33:05,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:33:05,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:33:05,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:33:05,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:33:05,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:33:05,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:33:05,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:33:05,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:33:05,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:33:05,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:33:05,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:33:05,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:33:05,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:33:05,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:33:05,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:33:05,841 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:33:05,842 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:33:05,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:33:05,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:33:05,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:33:05,842 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:33:05,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:33:05,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:33:05,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:33:05,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:33:05,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:33:05,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:33:05,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:33:05,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:33:05,844 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:33:05,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:33:05,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:33:05,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:33:05,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:33:05,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:33:05,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:33:05,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:33:05,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:33:05,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:33:05,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:33:05,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:33:05,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:33:05,847 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:33:05,848 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:33:05,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:33:05,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:33:05,848 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 009b18d49acf284b9866fb4283bf61c04b940d5d5b8f73fcface32bff3af3727 [2021-12-17 04:33:06,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:33:06,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:33:06,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:33:06,062 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:33:06,063 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:33:06,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label43.c [2021-12-17 04:33:06,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f26b93f1/f8e4cd2bded94cfc8eb40a3715998499/FLAGe854bc0bf [2021-12-17 04:33:06,670 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:33:06,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label43.c [2021-12-17 04:33:06,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f26b93f1/f8e4cd2bded94cfc8eb40a3715998499/FLAGe854bc0bf [2021-12-17 04:33:07,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f26b93f1/f8e4cd2bded94cfc8eb40a3715998499 [2021-12-17 04:33:07,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:33:07,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:33:07,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:33:07,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:33:07,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:33:07,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:33:07" (1/1) ... [2021-12-17 04:33:07,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9415964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:07, skipping insertion in model container [2021-12-17 04:33:07,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:33:07" (1/1) ... [2021-12-17 04:33:07,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:33:07,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:33:07,403 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/Problem12_label43.c[5259,5272] [2021-12-17 04:33:07,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:33:07,984 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:33:07,997 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/Problem12_label43.c[5259,5272] [2021-12-17 04:33:08,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:33:08,303 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:33:08,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08 WrapperNode [2021-12-17 04:33:08,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:33:08,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:33:08,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:33:08,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:33:08,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08" (1/1) ... [2021-12-17 04:33:08,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08" (1/1) ... [2021-12-17 04:33:08,585 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-17 04:33:08,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:33:08,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:33:08,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:33:08,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:33:08,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08" (1/1) ... [2021-12-17 04:33:08,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08" (1/1) ... [2021-12-17 04:33:08,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08" (1/1) ... [2021-12-17 04:33:08,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08" (1/1) ... [2021-12-17 04:33:08,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08" (1/1) ... [2021-12-17 04:33:08,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08" (1/1) ... [2021-12-17 04:33:08,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08" (1/1) ... [2021-12-17 04:33:08,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:33:08,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:33:08,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:33:08,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:33:09,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08" (1/1) ... [2021-12-17 04:33:09,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:33:09,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:33:09,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 04:33:09,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 04:33:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:33:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:33:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:33:09,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:33:09,153 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:33:09,154 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:33:11,695 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:33:11,710 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:33:11,710 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:33:11,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:33:11 BoogieIcfgContainer [2021-12-17 04:33:11,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:33:11,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:33:11,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:33:11,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:33:11,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:33:07" (1/3) ... [2021-12-17 04:33:11,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce6cae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:33:11, skipping insertion in model container [2021-12-17 04:33:11,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:33:08" (2/3) ... [2021-12-17 04:33:11,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce6cae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:33:11, skipping insertion in model container [2021-12-17 04:33:11,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:33:11" (3/3) ... [2021-12-17 04:33:11,719 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label43.c [2021-12-17 04:33:11,723 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:33:11,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:33:11,766 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:33:11,771 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 04:33:11,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:33:11,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 04:33:11,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:11,805 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] [2021-12-17 04:33:11,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:11,809 INFO L85 PathProgramCache]: Analyzing trace with hash 751578873, now seen corresponding path program 1 times [2021-12-17 04:33:11,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:11,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188212292] [2021-12-17 04:33:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:11,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:33:11,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:11,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188212292] [2021-12-17 04:33:11,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188212292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:11,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:11,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:33:11,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113673373] [2021-12-17 04:33:11,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:11,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:11,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:12,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:12,019 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:15,038 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-17 04:33:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:15,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-17 04:33:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:15,059 INFO L225 Difference]: With dead ends: 2388 [2021-12-17 04:33:15,060 INFO L226 Difference]: Without dead ends: 1506 [2021-12-17 04:33:15,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:15,069 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 818 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 1058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1058 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:15,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 102 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1058 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:33:15,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-17 04:33:15,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-17 04:33:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.869767441860465) internal successors, (2814), 1505 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2814 transitions. [2021-12-17 04:33:15,154 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2814 transitions. Word has length 41 [2021-12-17 04:33:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:15,154 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2814 transitions. [2021-12-17 04:33:15,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2814 transitions. [2021-12-17 04:33:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 04:33:15,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:15,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:33:15,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:33:15,158 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:15,158 INFO L85 PathProgramCache]: Analyzing trace with hash 727350928, now seen corresponding path program 1 times [2021-12-17 04:33:15,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:15,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384805381] [2021-12-17 04:33:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:15,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:33:15,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:15,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384805381] [2021-12-17 04:33:15,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384805381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:15,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:15,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:33:15,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844883080] [2021-12-17 04:33:15,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:15,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:15,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:15,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:15,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:15,238 INFO L87 Difference]: Start difference. First operand 1506 states and 2814 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:17,848 INFO L93 Difference]: Finished difference Result 4512 states and 8437 transitions. [2021-12-17 04:33:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:17,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-12-17 04:33:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:17,858 INFO L225 Difference]: With dead ends: 4512 [2021-12-17 04:33:17,858 INFO L226 Difference]: Without dead ends: 3008 [2021-12-17 04:33:17,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:17,861 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 726 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:17,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 494 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:33:17,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-12-17 04:33:17,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-12-17 04:33:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.5809777186564682) internal successors, (4754), 3007 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4754 transitions. [2021-12-17 04:33:17,903 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4754 transitions. Word has length 114 [2021-12-17 04:33:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:17,904 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4754 transitions. [2021-12-17 04:33:17,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4754 transitions. [2021-12-17 04:33:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 04:33:17,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:17,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:33:17,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:33:17,910 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:17,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash -29234635, now seen corresponding path program 1 times [2021-12-17 04:33:17,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:17,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407548648] [2021-12-17 04:33:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:17,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:33:18,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:18,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407548648] [2021-12-17 04:33:18,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407548648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:18,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:18,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:33:18,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13230695] [2021-12-17 04:33:18,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:18,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:33:18,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:33:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:33:18,095 INFO L87 Difference]: Start difference. First operand 3008 states and 4754 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:20,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:20,533 INFO L93 Difference]: Finished difference Result 6781 states and 10483 transitions. [2021-12-17 04:33:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 04:33:20,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-12-17 04:33:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:20,544 INFO L225 Difference]: With dead ends: 6781 [2021-12-17 04:33:20,544 INFO L226 Difference]: Without dead ends: 3775 [2021-12-17 04:33:20,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:33:20,549 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1361 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:20,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1645 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:33:20,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-12-17 04:33:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 3759. [2021-12-17 04:33:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.4664715274081959) internal successors, (5511), 3758 states have internal predecessors, (5511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5511 transitions. [2021-12-17 04:33:20,608 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5511 transitions. Word has length 116 [2021-12-17 04:33:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:20,608 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5511 transitions. [2021-12-17 04:33:20,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:20,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5511 transitions. [2021-12-17 04:33:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-17 04:33:20,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:20,611 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:33:20,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:33:20,612 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1617136006, now seen corresponding path program 1 times [2021-12-17 04:33:20,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:20,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121103333] [2021-12-17 04:33:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:20,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:33:20,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121103333] [2021-12-17 04:33:20,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121103333] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:33:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115712261] [2021-12-17 04:33:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:20,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:33:20,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:33:20,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:33:20,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:33:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:33:20,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:33:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 04:33:21,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:33:21,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115712261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:21,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:33:21,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 04:33:21,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525895092] [2021-12-17 04:33:21,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:21,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:21,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:21,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:21,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:33:21,198 INFO L87 Difference]: Start difference. First operand 3759 states and 5511 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:23,553 INFO L93 Difference]: Finished difference Result 9769 states and 15014 transitions. [2021-12-17 04:33:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:23,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-12-17 04:33:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:23,572 INFO L225 Difference]: With dead ends: 9769 [2021-12-17 04:33:23,572 INFO L226 Difference]: Without dead ends: 6763 [2021-12-17 04:33:23,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:33:23,579 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 662 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:23,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 504 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:33:23,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-12-17 04:33:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2021-12-17 04:33:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3630582667849749) internal successors, (9217), 6762 states have internal predecessors, (9217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9217 transitions. [2021-12-17 04:33:23,685 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9217 transitions. Word has length 182 [2021-12-17 04:33:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:23,686 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 9217 transitions. [2021-12-17 04:33:23,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9217 transitions. [2021-12-17 04:33:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-17 04:33:23,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:23,688 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:33:23,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 04:33:23,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:33:23,901 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:23,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1523572989, now seen corresponding path program 1 times [2021-12-17 04:33:23,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:23,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990084520] [2021-12-17 04:33:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:23,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 04:33:24,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990084520] [2021-12-17 04:33:24,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990084520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:24,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:24,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:33:24,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155563451] [2021-12-17 04:33:24,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:24,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:33:24,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:33:24,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:33:24,002 INFO L87 Difference]: Start difference. First operand 6763 states and 9217 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:26,729 INFO L93 Difference]: Finished difference Result 15814 states and 21328 transitions. [2021-12-17 04:33:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:33:26,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 187 [2021-12-17 04:33:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:26,766 INFO L225 Difference]: With dead ends: 15814 [2021-12-17 04:33:26,767 INFO L226 Difference]: Without dead ends: 9767 [2021-12-17 04:33:26,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:33:26,778 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3804 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 4011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 3804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:26,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 712 Invalid, 4011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 3804 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:33:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-12-17 04:33:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-12-17 04:33:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2621339340569322) internal successors, (12326), 9766 states have internal predecessors, (12326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12326 transitions. [2021-12-17 04:33:26,909 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12326 transitions. Word has length 187 [2021-12-17 04:33:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:26,909 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12326 transitions. [2021-12-17 04:33:26,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:26,910 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12326 transitions. [2021-12-17 04:33:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-17 04:33:26,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:26,912 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:33:26,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:33:26,912 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:26,913 INFO L85 PathProgramCache]: Analyzing trace with hash -457891820, now seen corresponding path program 1 times [2021-12-17 04:33:26,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:26,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689059885] [2021-12-17 04:33:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:26,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-17 04:33:27,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:27,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689059885] [2021-12-17 04:33:27,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689059885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:27,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:27,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:33:27,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749515920] [2021-12-17 04:33:27,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:27,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:27,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:27,010 INFO L87 Difference]: Start difference. First operand 9767 states and 12326 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:29,345 INFO L93 Difference]: Finished difference Result 27042 states and 34669 transitions. [2021-12-17 04:33:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:29,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2021-12-17 04:33:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:29,370 INFO L225 Difference]: With dead ends: 27042 [2021-12-17 04:33:29,370 INFO L226 Difference]: Without dead ends: 18028 [2021-12-17 04:33:29,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:29,383 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 697 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:29,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 427 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:33:29,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18028 states. [2021-12-17 04:33:29,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18028 to 15024. [2021-12-17 04:33:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15024 states, 15023 states have (on average 1.2227251547626972) internal successors, (18369), 15023 states have internal predecessors, (18369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15024 states to 15024 states and 18369 transitions. [2021-12-17 04:33:29,575 INFO L78 Accepts]: Start accepts. Automaton has 15024 states and 18369 transitions. Word has length 257 [2021-12-17 04:33:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:29,576 INFO L470 AbstractCegarLoop]: Abstraction has 15024 states and 18369 transitions. [2021-12-17 04:33:29,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 15024 states and 18369 transitions. [2021-12-17 04:33:29,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-17 04:33:29,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:29,579 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:33:29,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:33:29,579 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:29,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:29,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1313458115, now seen corresponding path program 1 times [2021-12-17 04:33:29,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:29,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922009016] [2021-12-17 04:33:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:29,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-17 04:33:29,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:29,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922009016] [2021-12-17 04:33:29,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922009016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:29,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:29,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:33:29,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820914611] [2021-12-17 04:33:29,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:29,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:29,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:29,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:29,670 INFO L87 Difference]: Start difference. First operand 15024 states and 18369 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:32,092 INFO L93 Difference]: Finished difference Result 39811 states and 49583 transitions. [2021-12-17 04:33:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:32,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-12-17 04:33:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:32,132 INFO L225 Difference]: With dead ends: 39811 [2021-12-17 04:33:32,133 INFO L226 Difference]: Without dead ends: 25540 [2021-12-17 04:33:32,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:32,148 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:32,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 310 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:33:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25540 states. [2021-12-17 04:33:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25540 to 23285. [2021-12-17 04:33:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.2043463322453187) internal successors, (28042), 23284 states have internal predecessors, (28042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 28042 transitions. [2021-12-17 04:33:32,412 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 28042 transitions. Word has length 263 [2021-12-17 04:33:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:32,412 INFO L470 AbstractCegarLoop]: Abstraction has 23285 states and 28042 transitions. [2021-12-17 04:33:32,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 28042 transitions. [2021-12-17 04:33:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-12-17 04:33:32,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:32,415 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:33:32,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:33:32,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:32,416 INFO L85 PathProgramCache]: Analyzing trace with hash -972496364, now seen corresponding path program 1 times [2021-12-17 04:33:32,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:32,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056300301] [2021-12-17 04:33:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:32,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:33:32,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:32,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056300301] [2021-12-17 04:33:32,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056300301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:32,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:32,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:33:32,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250274907] [2021-12-17 04:33:32,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:32,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:32,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:32,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:32,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:32,478 INFO L87 Difference]: Start difference. First operand 23285 states and 28042 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:35,139 INFO L93 Difference]: Finished difference Result 49572 states and 59254 transitions. [2021-12-17 04:33:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:35,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 268 [2021-12-17 04:33:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:35,173 INFO L225 Difference]: With dead ends: 49572 [2021-12-17 04:33:35,173 INFO L226 Difference]: Without dead ends: 27040 [2021-12-17 04:33:35,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:35,192 INFO L933 BasicCegarLoop]: 1326 mSDtfsCounter, 682 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2697 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:35,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1333 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2697 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:33:35,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27040 states. [2021-12-17 04:33:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27040 to 24787. [2021-12-17 04:33:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24787 states, 24786 states have (on average 1.1655369966916809) internal successors, (28889), 24786 states have internal predecessors, (28889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24787 states to 24787 states and 28889 transitions. [2021-12-17 04:33:35,459 INFO L78 Accepts]: Start accepts. Automaton has 24787 states and 28889 transitions. Word has length 268 [2021-12-17 04:33:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:35,461 INFO L470 AbstractCegarLoop]: Abstraction has 24787 states and 28889 transitions. [2021-12-17 04:33:35,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 24787 states and 28889 transitions. [2021-12-17 04:33:35,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-17 04:33:35,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:35,464 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:33:35,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:33:35,464 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:35,464 INFO L85 PathProgramCache]: Analyzing trace with hash 945852894, now seen corresponding path program 1 times [2021-12-17 04:33:35,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:35,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19132202] [2021-12-17 04:33:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:35,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-17 04:33:35,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:35,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19132202] [2021-12-17 04:33:35,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19132202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:35,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:35,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:33:35,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143256083] [2021-12-17 04:33:35,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:35,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:35,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:35,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:35,543 INFO L87 Difference]: Start difference. First operand 24787 states and 28889 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:38,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:38,160 INFO L93 Difference]: Finished difference Result 60086 states and 71162 transitions. [2021-12-17 04:33:38,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:38,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 272 [2021-12-17 04:33:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:38,203 INFO L225 Difference]: With dead ends: 60086 [2021-12-17 04:33:38,203 INFO L226 Difference]: Without dead ends: 36052 [2021-12-17 04:33:38,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:38,221 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 755 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:38,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 415 Invalid, 2946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2243 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:33:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36052 states. [2021-12-17 04:33:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36052 to 35301. [2021-12-17 04:33:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35301 states, 35300 states have (on average 1.1661756373937677) internal successors, (41166), 35300 states have internal predecessors, (41166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35301 states to 35301 states and 41166 transitions. [2021-12-17 04:33:38,591 INFO L78 Accepts]: Start accepts. Automaton has 35301 states and 41166 transitions. Word has length 272 [2021-12-17 04:33:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:38,592 INFO L470 AbstractCegarLoop]: Abstraction has 35301 states and 41166 transitions. [2021-12-17 04:33:38,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 35301 states and 41166 transitions. [2021-12-17 04:33:38,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-17 04:33:38,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:38,596 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:33:38,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:33:38,596 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash 376928467, now seen corresponding path program 1 times [2021-12-17 04:33:38,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:38,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429580614] [2021-12-17 04:33:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:38,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-17 04:33:38,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:38,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429580614] [2021-12-17 04:33:38,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429580614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:38,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:38,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:33:38,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646774751] [2021-12-17 04:33:38,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:38,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:38,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:38,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:38,697 INFO L87 Difference]: Start difference. First operand 35301 states and 41166 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:41,259 INFO L93 Difference]: Finished difference Result 87873 states and 103871 transitions. [2021-12-17 04:33:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:41,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 303 [2021-12-17 04:33:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:41,322 INFO L225 Difference]: With dead ends: 87873 [2021-12-17 04:33:41,322 INFO L226 Difference]: Without dead ends: 53325 [2021-12-17 04:33:41,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:41,349 INFO L933 BasicCegarLoop]: 1385 mSDtfsCounter, 715 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:41,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 1393 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:33:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53325 states. [2021-12-17 04:33:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53325 to 53325. [2021-12-17 04:33:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53325 states, 53324 states have (on average 1.1303915685244919) internal successors, (60277), 53324 states have internal predecessors, (60277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53325 states to 53325 states and 60277 transitions. [2021-12-17 04:33:41,976 INFO L78 Accepts]: Start accepts. Automaton has 53325 states and 60277 transitions. Word has length 303 [2021-12-17 04:33:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:41,977 INFO L470 AbstractCegarLoop]: Abstraction has 53325 states and 60277 transitions. [2021-12-17 04:33:41,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 53325 states and 60277 transitions. [2021-12-17 04:33:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-12-17 04:33:41,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:41,984 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:33:41,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:33:41,984 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:41,985 INFO L85 PathProgramCache]: Analyzing trace with hash 75816339, now seen corresponding path program 1 times [2021-12-17 04:33:41,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:41,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630443515] [2021-12-17 04:33:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:41,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 04:33:42,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:42,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630443515] [2021-12-17 04:33:42,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630443515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:42,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:42,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:33:42,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706722399] [2021-12-17 04:33:42,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:42,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:42,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:42,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:42,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:42,095 INFO L87 Difference]: Start difference. First operand 53325 states and 60277 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:44,583 INFO L93 Difference]: Finished difference Result 125423 states and 143780 transitions. [2021-12-17 04:33:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 362 [2021-12-17 04:33:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:44,669 INFO L225 Difference]: With dead ends: 125423 [2021-12-17 04:33:44,669 INFO L226 Difference]: Without dead ends: 72851 [2021-12-17 04:33:44,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:44,926 INFO L933 BasicCegarLoop]: 1214 mSDtfsCounter, 682 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:44,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1222 Invalid, 2787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:33:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72851 states. [2021-12-17 04:33:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72851 to 72851. [2021-12-17 04:33:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72851 states, 72850 states have (on average 1.1122992450240219) internal successors, (81031), 72850 states have internal predecessors, (81031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72851 states to 72851 states and 81031 transitions. [2021-12-17 04:33:45,791 INFO L78 Accepts]: Start accepts. Automaton has 72851 states and 81031 transitions. Word has length 362 [2021-12-17 04:33:45,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:45,792 INFO L470 AbstractCegarLoop]: Abstraction has 72851 states and 81031 transitions. [2021-12-17 04:33:45,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:45,792 INFO L276 IsEmpty]: Start isEmpty. Operand 72851 states and 81031 transitions. [2021-12-17 04:33:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-12-17 04:33:45,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:45,802 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, 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, 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] [2021-12-17 04:33:45,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:33:45,803 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1903504849, now seen corresponding path program 1 times [2021-12-17 04:33:45,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:45,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553215187] [2021-12-17 04:33:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:45,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 196 proven. 333 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-12-17 04:33:46,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:46,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553215187] [2021-12-17 04:33:46,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553215187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:33:46,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889316012] [2021-12-17 04:33:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:46,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:33:46,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:33:46,070 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) [2021-12-17 04:33:46,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:33:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:46,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:33:46,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:33:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-17 04:33:46,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:33:46,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889316012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:46,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:33:46,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 04:33:46,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237320429] [2021-12-17 04:33:46,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:46,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:46,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:46,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:46,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:33:46,707 INFO L87 Difference]: Start difference. First operand 72851 states and 81031 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:49,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:49,197 INFO L93 Difference]: Finished difference Result 162973 states and 181337 transitions. [2021-12-17 04:33:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:49,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 479 [2021-12-17 04:33:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:49,383 INFO L225 Difference]: With dead ends: 162973 [2021-12-17 04:33:49,384 INFO L226 Difference]: Without dead ends: 90875 [2021-12-17 04:33:49,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:33:49,416 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 833 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:49,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 1117 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 04:33:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90875 states. [2021-12-17 04:33:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90875 to 90875. [2021-12-17 04:33:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90875 states, 90874 states have (on average 1.1012940995224156) internal successors, (100079), 90874 states have internal predecessors, (100079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90875 states to 90875 states and 100079 transitions. [2021-12-17 04:33:50,298 INFO L78 Accepts]: Start accepts. Automaton has 90875 states and 100079 transitions. Word has length 479 [2021-12-17 04:33:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:50,299 INFO L470 AbstractCegarLoop]: Abstraction has 90875 states and 100079 transitions. [2021-12-17 04:33:50,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 90875 states and 100079 transitions. [2021-12-17 04:33:50,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-12-17 04:33:50,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:50,310 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:33:50,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 04:33:50,511 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,SelfDestructingSolverStorable11 [2021-12-17 04:33:50,511 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:50,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash -417505123, now seen corresponding path program 1 times [2021-12-17 04:33:50,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:50,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485956989] [2021-12-17 04:33:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:50,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-12-17 04:33:50,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:50,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485956989] [2021-12-17 04:33:50,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485956989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:50,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:50,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:33:50,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157560456] [2021-12-17 04:33:50,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:50,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:50,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:50,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:50,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:50,791 INFO L87 Difference]: Start difference. First operand 90875 states and 100079 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:53,795 INFO L93 Difference]: Finished difference Result 212539 states and 236157 transitions. [2021-12-17 04:33:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:53,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 520 [2021-12-17 04:33:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:53,940 INFO L225 Difference]: With dead ends: 212539 [2021-12-17 04:33:53,940 INFO L226 Difference]: Without dead ends: 118662 [2021-12-17 04:33:53,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:53,966 INFO L933 BasicCegarLoop]: 1277 mSDtfsCounter, 654 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2214 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 2834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:53,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 1285 Invalid, 2834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2214 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:33:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118662 states. [2021-12-17 04:33:54,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118662 to 114907. [2021-12-17 04:33:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114907 states, 114906 states have (on average 1.0895340539223366) internal successors, (125194), 114906 states have internal predecessors, (125194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114907 states to 114907 states and 125194 transitions. [2021-12-17 04:33:55,222 INFO L78 Accepts]: Start accepts. Automaton has 114907 states and 125194 transitions. Word has length 520 [2021-12-17 04:33:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:55,223 INFO L470 AbstractCegarLoop]: Abstraction has 114907 states and 125194 transitions. [2021-12-17 04:33:55,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 114907 states and 125194 transitions. [2021-12-17 04:33:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2021-12-17 04:33:55,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:55,243 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, 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, 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] [2021-12-17 04:33:55,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:33:55,244 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:55,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:55,244 INFO L85 PathProgramCache]: Analyzing trace with hash -104616442, now seen corresponding path program 1 times [2021-12-17 04:33:55,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:55,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936524183] [2021-12-17 04:33:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:55,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 592 proven. 229 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 04:33:55,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936524183] [2021-12-17 04:33:55,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936524183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:33:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175031083] [2021-12-17 04:33:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:55,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:33:55,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:33:55,439 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) [2021-12-17 04:33:55,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 04:33:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:55,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:33:55,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:33:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 737 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-17 04:33:56,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:33:56,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175031083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:56,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:33:56,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 04:33:56,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65976915] [2021-12-17 04:33:56,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:56,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:56,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:56,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:56,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:33:56,839 INFO L87 Difference]: Start difference. First operand 114907 states and 125194 transitions. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:33:59,759 INFO L93 Difference]: Finished difference Result 248587 states and 271010 transitions. [2021-12-17 04:33:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:33:59,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 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 611 [2021-12-17 04:33:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:33:59,922 INFO L225 Difference]: With dead ends: 248587 [2021-12-17 04:33:59,922 INFO L226 Difference]: Without dead ends: 134433 [2021-12-17 04:33:59,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 611 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:33:59,955 INFO L933 BasicCegarLoop]: 1350 mSDtfsCounter, 592 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:33:59,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 1358 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:34:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134433 states. [2021-12-17 04:34:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134433 to 132931. [2021-12-17 04:34:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132931 states, 132930 states have (on average 1.0809824719777326) internal successors, (143695), 132930 states have internal predecessors, (143695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132931 states to 132931 states and 143695 transitions. [2021-12-17 04:34:01,406 INFO L78 Accepts]: Start accepts. Automaton has 132931 states and 143695 transitions. Word has length 611 [2021-12-17 04:34:01,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:34:01,406 INFO L470 AbstractCegarLoop]: Abstraction has 132931 states and 143695 transitions. [2021-12-17 04:34:01,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 132931 states and 143695 transitions. [2021-12-17 04:34:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2021-12-17 04:34:01,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:34:01,425 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, 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, 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] [2021-12-17 04:34:01,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 04:34:01,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:34:01,640 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:34:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:34:01,640 INFO L85 PathProgramCache]: Analyzing trace with hash -297864749, now seen corresponding path program 1 times [2021-12-17 04:34:01,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:34:01,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339153062] [2021-12-17 04:34:01,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:34:01,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:34:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:34:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 757 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-17 04:34:02,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:34:02,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339153062] [2021-12-17 04:34:02,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339153062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:34:02,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:34:02,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:34:02,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796551072] [2021-12-17 04:34:02,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:34:02,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:34:02,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:34:02,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:34:02,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:34:02,046 INFO L87 Difference]: Start difference. First operand 132931 states and 143695 transitions. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:34:04,898 INFO L93 Difference]: Finished difference Result 271868 states and 293530 transitions. [2021-12-17 04:34:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:34:04,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 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 621 [2021-12-17 04:34:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:34:05,078 INFO L225 Difference]: With dead ends: 271868 [2021-12-17 04:34:05,078 INFO L226 Difference]: Without dead ends: 139690 [2021-12-17 04:34:05,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:34:05,136 INFO L933 BasicCegarLoop]: 1364 mSDtfsCounter, 590 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:34:05,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 1372 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2521 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:34:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139690 states. [2021-12-17 04:34:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139690 to 134433. [2021-12-17 04:34:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134433 states, 134432 states have (on average 1.079132944537015) internal successors, (145070), 134432 states have internal predecessors, (145070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134433 states to 134433 states and 145070 transitions. [2021-12-17 04:34:06,817 INFO L78 Accepts]: Start accepts. Automaton has 134433 states and 145070 transitions. Word has length 621 [2021-12-17 04:34:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:34:06,817 INFO L470 AbstractCegarLoop]: Abstraction has 134433 states and 145070 transitions. [2021-12-17 04:34:06,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 134433 states and 145070 transitions. [2021-12-17 04:34:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2021-12-17 04:34:06,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:34:06,841 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, 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, 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, 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] [2021-12-17 04:34:06,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:34:06,841 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:34:06,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:34:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash -800968748, now seen corresponding path program 1 times [2021-12-17 04:34:06,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:34:06,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213192260] [2021-12-17 04:34:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:34:06,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:34:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:34:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 831 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-17 04:34:06,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:34:06,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213192260] [2021-12-17 04:34:06,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213192260] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:34:06,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:34:06,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:34:06,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749599760] [2021-12-17 04:34:06,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:34:06,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:34:06,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:34:06,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:34:06,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:34:06,990 INFO L87 Difference]: Start difference. First operand 134433 states and 145070 transitions. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:34:10,185 INFO L93 Difference]: Finished difference Result 270366 states and 291701 transitions. [2021-12-17 04:34:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:34:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 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 658 [2021-12-17 04:34:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:34:10,353 INFO L225 Difference]: With dead ends: 270366 [2021-12-17 04:34:10,353 INFO L226 Difference]: Without dead ends: 135935 [2021-12-17 04:34:10,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:34:10,408 INFO L933 BasicCegarLoop]: 1254 mSDtfsCounter, 605 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2125 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 2746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 2125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:34:10,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 1262 Invalid, 2746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [621 Valid, 2125 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:34:10,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135935 states. [2021-12-17 04:34:11,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135935 to 134433. [2021-12-17 04:34:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134433 states, 134432 states have (on average 1.05981462746965) internal successors, (142473), 134432 states have internal predecessors, (142473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134433 states to 134433 states and 142473 transitions. [2021-12-17 04:34:12,162 INFO L78 Accepts]: Start accepts. Automaton has 134433 states and 142473 transitions. Word has length 658 [2021-12-17 04:34:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:34:12,166 INFO L470 AbstractCegarLoop]: Abstraction has 134433 states and 142473 transitions. [2021-12-17 04:34:12,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 134433 states and 142473 transitions. [2021-12-17 04:34:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2021-12-17 04:34:12,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:34:12,183 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, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:34:12,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:34:12,184 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:34:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:34:12,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1292114732, now seen corresponding path program 1 times [2021-12-17 04:34:12,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:34:12,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960311224] [2021-12-17 04:34:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:34:12,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:34:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:34:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 678 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-17 04:34:12,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:34:12,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960311224] [2021-12-17 04:34:12,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960311224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:34:12,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:34:12,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:34:12,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535306555] [2021-12-17 04:34:12,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:34:12,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:34:12,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:34:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:34:12,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:34:12,301 INFO L87 Difference]: Start difference. First operand 134433 states and 142473 transitions. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:34:15,416 INFO L93 Difference]: Finished difference Result 301157 states and 320789 transitions. [2021-12-17 04:34:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:34:15,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 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 662 [2021-12-17 04:34:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:34:15,616 INFO L225 Difference]: With dead ends: 301157 [2021-12-17 04:34:15,616 INFO L226 Difference]: Without dead ends: 167477 [2021-12-17 04:34:15,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:34:15,698 INFO L933 BasicCegarLoop]: 1245 mSDtfsCounter, 666 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 2826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:34:15,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 1253 Invalid, 2826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:34:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167477 states. [2021-12-17 04:34:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167477 to 165975. [2021-12-17 04:34:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165975 states, 165974 states have (on average 1.0564486003831925) internal successors, (175343), 165974 states have internal predecessors, (175343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165975 states to 165975 states and 175343 transitions. [2021-12-17 04:34:17,740 INFO L78 Accepts]: Start accepts. Automaton has 165975 states and 175343 transitions. Word has length 662 [2021-12-17 04:34:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:34:17,740 INFO L470 AbstractCegarLoop]: Abstraction has 165975 states and 175343 transitions. [2021-12-17 04:34:17,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 165975 states and 175343 transitions. [2021-12-17 04:34:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2021-12-17 04:34:17,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:34:17,761 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, 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, 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, 2, 2, 2, 2, 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] [2021-12-17 04:34:17,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 04:34:17,761 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:34:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:34:17,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2101412175, now seen corresponding path program 1 times [2021-12-17 04:34:17,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:34:17,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790082203] [2021-12-17 04:34:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:34:17,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:34:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:34:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 589 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-17 04:34:18,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:34:18,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790082203] [2021-12-17 04:34:18,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790082203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:34:18,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:34:18,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 04:34:18,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119455277] [2021-12-17 04:34:18,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:34:18,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 04:34:18,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:34:18,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 04:34:18,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:34:18,374 INFO L87 Difference]: Start difference. First operand 165975 states and 175343 transitions. Second operand has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:34:21,681 INFO L93 Difference]: Finished difference Result 299447 states and 314349 transitions. [2021-12-17 04:34:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 04:34:21,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 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 [2021-12-17 04:34:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:34:21,822 INFO L225 Difference]: With dead ends: 299447 [2021-12-17 04:34:21,822 INFO L226 Difference]: Without dead ends: 127466 [2021-12-17 04:34:21,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:34:21,871 INFO L933 BasicCegarLoop]: 1328 mSDtfsCounter, 1573 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2805 mSolverCounterSat, 1233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 4038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1233 IncrementalHoareTripleChecker+Valid, 2805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:34:21,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1573 Valid, 1344 Invalid, 4038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1233 Valid, 2805 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:34:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127466 states. [2021-12-17 04:34:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127466 to 115658. [2021-12-17 04:34:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115658 states, 115657 states have (on average 1.0308152554536258) internal successors, (119221), 115657 states have internal predecessors, (119221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:23,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115658 states to 115658 states and 119221 transitions. [2021-12-17 04:34:23,133 INFO L78 Accepts]: Start accepts. Automaton has 115658 states and 119221 transitions. Word has length 737 [2021-12-17 04:34:23,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:34:23,133 INFO L470 AbstractCegarLoop]: Abstraction has 115658 states and 119221 transitions. [2021-12-17 04:34:23,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 115658 states and 119221 transitions. [2021-12-17 04:34:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2021-12-17 04:34:23,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:34:23,158 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, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:34:23,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 04:34:23,159 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:34:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:34:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash -670035394, now seen corresponding path program 1 times [2021-12-17 04:34:23,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:34:23,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329105608] [2021-12-17 04:34:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:34:23,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:34:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:34:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 805 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-17 04:34:23,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:34:23,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329105608] [2021-12-17 04:34:23,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329105608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:34:23,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:34:23,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:34:23,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570038455] [2021-12-17 04:34:23,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:34:23,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:34:23,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:34:23,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:34:23,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:34:23,656 INFO L87 Difference]: Start difference. First operand 115658 states and 119221 transitions. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:26,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:34:26,179 INFO L93 Difference]: Finished difference Result 231314 states and 238440 transitions. [2021-12-17 04:34:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:34:26,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 789 [2021-12-17 04:34:26,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:34:26,349 INFO L225 Difference]: With dead ends: 231314 [2021-12-17 04:34:26,349 INFO L226 Difference]: Without dead ends: 115658 [2021-12-17 04:34:26,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:34:26,426 INFO L933 BasicCegarLoop]: 1086 mSDtfsCounter, 709 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:34:26,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 1093 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 2026 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 04:34:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115658 states. [2021-12-17 04:34:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115658 to 113405. [2021-12-17 04:34:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113405 states, 113404 states have (on average 1.0261542802723007) internal successors, (116370), 113404 states have internal predecessors, (116370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113405 states to 113405 states and 116370 transitions. [2021-12-17 04:34:27,864 INFO L78 Accepts]: Start accepts. Automaton has 113405 states and 116370 transitions. Word has length 789 [2021-12-17 04:34:27,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:34:27,865 INFO L470 AbstractCegarLoop]: Abstraction has 113405 states and 116370 transitions. [2021-12-17 04:34:27,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 113405 states and 116370 transitions. [2021-12-17 04:34:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2021-12-17 04:34:27,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:34:27,894 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:34:27,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 04:34:27,894 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:34:27,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:34:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1323794218, now seen corresponding path program 1 times [2021-12-17 04:34:27,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:34:27,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747472483] [2021-12-17 04:34:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:34:27,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:34:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:34:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1375 backedges. 694 proven. 0 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2021-12-17 04:34:28,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:34:28,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747472483] [2021-12-17 04:34:28,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747472483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:34:28,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:34:28,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:34:28,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761985312] [2021-12-17 04:34:28,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:34:28,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:34:28,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:34:28,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:34:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:34:28,114 INFO L87 Difference]: Start difference. First operand 113405 states and 116370 transitions. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:30,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:34:30,460 INFO L93 Difference]: Finished difference Result 226055 states and 231981 transitions. [2021-12-17 04:34:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:34:30,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 903 [2021-12-17 04:34:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:34:30,461 INFO L225 Difference]: With dead ends: 226055 [2021-12-17 04:34:30,461 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 04:34:30,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:34:30,521 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 666 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:34:30,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 905 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 04:34:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 04:34:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 04:34:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 04:34:30,522 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 903 [2021-12-17 04:34:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:34:30,522 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 04:34:30,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:34:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 04:34:30,523 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 04:34:30,524 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 04:34:30,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 04:34:30,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.