./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label08.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 7a6125f7fd3671a946bbcfb84d914b36dcf28a309f479868ec22e7caec5cb206 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:20:13,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:20:13,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:20:13,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:20:13,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:20:13,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:20:13,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:20:13,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:20:13,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:20:13,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:20:13,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:20:13,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:20:13,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:20:13,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:20:13,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:20:13,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:20:13,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:20:13,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:20:13,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:20:13,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:20:13,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:20:13,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:20:13,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:20:13,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:20:13,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:20:13,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:20:13,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:20:13,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:20:13,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:20:13,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:20:13,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:20:13,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:20:13,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:20:13,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:20:13,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:20:13,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:20:13,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:20:13,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:20:13,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:20:13,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:20:13,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:20:13,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:20:13,767 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:20:13,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:20:13,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:20:13,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:20:13,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:20:13,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:20:13,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:20:13,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:20:13,771 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:20:13,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:20:13,772 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:20:13,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:20:13,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:20:13,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:20:13,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:20:13,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:20:13,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:20:13,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:20:13,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:20:13,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:20:13,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:20:13,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:20:13,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:20:13,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:20:13,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:20:13,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:20:13,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:20:13,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:20:13,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:20:13,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:20:13,777 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:20:13,777 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:20:13,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:20:13,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:20:13,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a6125f7fd3671a946bbcfb84d914b36dcf28a309f479868ec22e7caec5cb206 [2021-12-22 09:20:13,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:20:13,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:20:13,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:20:13,998 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:20:13,998 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:20:13,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label08.c [2021-12-22 09:20:14,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76605c765/85c42291cd974c378e90a69e8ca179e8/FLAG3a5ab9723 [2021-12-22 09:20:14,622 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:20:14,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label08.c [2021-12-22 09:20:14,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76605c765/85c42291cd974c378e90a69e8ca179e8/FLAG3a5ab9723 [2021-12-22 09:20:14,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76605c765/85c42291cd974c378e90a69e8ca179e8 [2021-12-22 09:20:14,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:20:14,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:20:14,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:20:14,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:20:14,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:20:14,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:20:14" (1/1) ... [2021-12-22 09:20:14,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f9ef2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:14, skipping insertion in model container [2021-12-22 09:20:14,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:20:14" (1/1) ... [2021-12-22 09:20:14,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:20:14,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:20:15,096 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/Problem13_label08.c[7141,7154] [2021-12-22 09:20:15,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:20:15,643 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:20:15,670 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/Problem13_label08.c[7141,7154] [2021-12-22 09:20:16,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:20:16,090 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:20:16,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16 WrapperNode [2021-12-22 09:20:16,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:20:16,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:20:16,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:20:16,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:20:16,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16" (1/1) ... [2021-12-22 09:20:16,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16" (1/1) ... [2021-12-22 09:20:16,521 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-22 09:20:16,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:20:16,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:20:16,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:20:16,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:20:16,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16" (1/1) ... [2021-12-22 09:20:16,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16" (1/1) ... [2021-12-22 09:20:16,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16" (1/1) ... [2021-12-22 09:20:16,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16" (1/1) ... [2021-12-22 09:20:17,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16" (1/1) ... [2021-12-22 09:20:17,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16" (1/1) ... [2021-12-22 09:20:17,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16" (1/1) ... [2021-12-22 09:20:17,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:20:17,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:20:17,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:20:17,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:20:17,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16" (1/1) ... [2021-12-22 09:20:17,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:20:17,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:20:17,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 09:20:17,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 09:20:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:20:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:20:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:20:17,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:20:17,380 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:20:17,381 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:20:20,867 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:20:20,879 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:20:20,879 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:20:20,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:20:20 BoogieIcfgContainer [2021-12-22 09:20:20,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:20:20,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:20:20,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:20:20,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:20:20,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:20:14" (1/3) ... [2021-12-22 09:20:20,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf73e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:20:20, skipping insertion in model container [2021-12-22 09:20:20,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:16" (2/3) ... [2021-12-22 09:20:20,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf73e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:20:20, skipping insertion in model container [2021-12-22 09:20:20,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:20:20" (3/3) ... [2021-12-22 09:20:20,890 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label08.c [2021-12-22 09:20:20,893 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:20:20,894 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:20:20,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:20:20,932 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 09:20:20,932 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:20:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:20,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 09:20:20,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:20,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:20,962 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:20,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:20,966 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2021-12-22 09:20:20,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:20,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651194605] [2021-12-22 09:20:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:20,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:20:21,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651194605] [2021-12-22 09:20:21,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651194605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:21,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:21,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:20:21,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90435735] [2021-12-22 09:20:21,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:21,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:21,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:21,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:21,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:21,188 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:24,762 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-12-22 09:20:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:24,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-12-22 09:20:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:24,781 INFO L225 Difference]: With dead ends: 3035 [2021-12-22 09:20:24,781 INFO L226 Difference]: Without dead ends: 1873 [2021-12-22 09:20:24,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:24,790 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 855 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:24,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-22 09:20:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-12-22 09:20:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-12-22 09:20:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-12-22 09:20:24,883 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 50 [2021-12-22 09:20:24,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:24,883 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-12-22 09:20:24,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:24,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-12-22 09:20:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-22 09:20:24,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:24,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:20:24,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:20:24,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:24,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1073959653, now seen corresponding path program 1 times [2021-12-22 09:20:24,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:24,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444896937] [2021-12-22 09:20:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:24,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:20:25,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:25,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444896937] [2021-12-22 09:20:25,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444896937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:25,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:25,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:20:25,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558785263] [2021-12-22 09:20:25,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:25,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:25,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:25,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:25,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:25,044 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:28,267 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2021-12-22 09:20:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:28,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-22 09:20:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:28,278 INFO L225 Difference]: With dead ends: 5317 [2021-12-22 09:20:28,278 INFO L226 Difference]: Without dead ends: 3460 [2021-12-22 09:20:28,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:28,283 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:28,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1192 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-22 09:20:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-12-22 09:20:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2021-12-22 09:20:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.3805668016194332) internal successors, (4774), 3458 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2021-12-22 09:20:28,337 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 122 [2021-12-22 09:20:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:28,338 INFO L470 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2021-12-22 09:20:28,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2021-12-22 09:20:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 09:20:28,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:28,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:20:28,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:20:28,341 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:28,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:28,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1015718372, now seen corresponding path program 1 times [2021-12-22 09:20:28,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:28,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353351443] [2021-12-22 09:20:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:28,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:20:28,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:28,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353351443] [2021-12-22 09:20:28,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353351443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:28,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:28,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:20:28,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018959829] [2021-12-22 09:20:28,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:28,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:20:28,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:20:28,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:20:28,488 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:32,936 INFO L93 Difference]: Finished difference Result 10870 states and 14768 transitions. [2021-12-22 09:20:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:20:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-22 09:20:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:32,956 INFO L225 Difference]: With dead ends: 10870 [2021-12-22 09:20:32,957 INFO L226 Difference]: Without dead ends: 7413 [2021-12-22 09:20:32,962 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 [2021-12-22 09:20:32,968 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 2579 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 4951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:32,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2579 Valid, 1003 Invalid, 4951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-22 09:20:32,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2021-12-22 09:20:33,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 7412. [2021-12-22 09:20:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 1.2698691134799622) internal successors, (9411), 7411 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 9411 transitions. [2021-12-22 09:20:33,074 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 9411 transitions. Word has length 136 [2021-12-22 09:20:33,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:33,075 INFO L470 AbstractCegarLoop]: Abstraction has 7412 states and 9411 transitions. [2021-12-22 09:20:33,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 9411 transitions. [2021-12-22 09:20:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-22 09:20:33,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:33,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:33,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:20:33,081 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:33,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1943123758, now seen corresponding path program 1 times [2021-12-22 09:20:33,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:33,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871735913] [2021-12-22 09:20:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:33,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 09:20:33,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:33,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871735913] [2021-12-22 09:20:33,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871735913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:33,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:33,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:20:33,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700205675] [2021-12-22 09:20:33,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:33,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:33,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:33,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:33,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:33,315 INFO L87 Difference]: Start difference. First operand 7412 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:36,595 INFO L93 Difference]: Finished difference Result 20355 states and 26251 transitions. [2021-12-22 09:20:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:36,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 217 [2021-12-22 09:20:36,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:36,639 INFO L225 Difference]: With dead ends: 20355 [2021-12-22 09:20:36,639 INFO L226 Difference]: Without dead ends: 13732 [2021-12-22 09:20:36,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:36,650 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 888 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:36,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 978 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-22 09:20:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2021-12-22 09:20:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 12937. [2021-12-22 09:20:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2021-12-22 09:20:36,852 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 217 [2021-12-22 09:20:36,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:36,853 INFO L470 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2021-12-22 09:20:36,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2021-12-22 09:20:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-22 09:20:36,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:36,857 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:36,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:20:36,857 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:36,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1785955714, now seen corresponding path program 1 times [2021-12-22 09:20:36,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:36,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734727722] [2021-12-22 09:20:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:36,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:20:36,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:36,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734727722] [2021-12-22 09:20:36,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734727722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:36,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:36,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:20:36,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855902321] [2021-12-22 09:20:36,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:36,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:36,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:36,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:36,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:36,973 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:40,059 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2021-12-22 09:20:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 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 249 [2021-12-22 09:20:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:40,108 INFO L225 Difference]: With dead ends: 31392 [2021-12-22 09:20:40,108 INFO L226 Difference]: Without dead ends: 19244 [2021-12-22 09:20:40,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:40,122 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 858 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:40,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 09:20:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2021-12-22 09:20:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 18447. [2021-12-22 09:20:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18447 states, 18446 states have (on average 1.2024287108316165) internal successors, (22180), 18446 states have internal predecessors, (22180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18447 states to 18447 states and 22180 transitions. [2021-12-22 09:20:40,372 INFO L78 Accepts]: Start accepts. Automaton has 18447 states and 22180 transitions. Word has length 249 [2021-12-22 09:20:40,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:40,373 INFO L470 AbstractCegarLoop]: Abstraction has 18447 states and 22180 transitions. [2021-12-22 09:20:40,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:40,376 INFO L276 IsEmpty]: Start isEmpty. Operand 18447 states and 22180 transitions. [2021-12-22 09:20:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-12-22 09:20:40,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:40,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:40,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:20:40,384 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:40,385 INFO L85 PathProgramCache]: Analyzing trace with hash 74956696, now seen corresponding path program 1 times [2021-12-22 09:20:40,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:40,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701841474] [2021-12-22 09:20:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:40,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-22 09:20:40,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:40,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701841474] [2021-12-22 09:20:40,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701841474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:40,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:40,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:20:40,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34889382] [2021-12-22 09:20:40,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:40,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:40,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:40,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:40,540 INFO L87 Difference]: Start difference. First operand 18447 states and 22180 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:43,606 INFO L93 Difference]: Finished difference Result 42412 states and 52037 transitions. [2021-12-22 09:20:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:43,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 338 [2021-12-22 09:20:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:43,647 INFO L225 Difference]: With dead ends: 42412 [2021-12-22 09:20:43,648 INFO L226 Difference]: Without dead ends: 24754 [2021-12-22 09:20:43,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:43,664 INFO L933 BasicCegarLoop]: 1796 mSDtfsCounter, 820 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:43,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 1947 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 09:20:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24754 states. [2021-12-22 09:20:43,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24754 to 23962. [2021-12-22 09:20:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23962 states, 23961 states have (on average 1.1787070656483452) internal successors, (28243), 23961 states have internal predecessors, (28243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:43,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23962 states to 23962 states and 28243 transitions. [2021-12-22 09:20:43,979 INFO L78 Accepts]: Start accepts. Automaton has 23962 states and 28243 transitions. Word has length 338 [2021-12-22 09:20:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:43,980 INFO L470 AbstractCegarLoop]: Abstraction has 23962 states and 28243 transitions. [2021-12-22 09:20:43,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 23962 states and 28243 transitions. [2021-12-22 09:20:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-22 09:20:43,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:43,985 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:43,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:20:43,986 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:43,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:43,987 INFO L85 PathProgramCache]: Analyzing trace with hash -95192770, now seen corresponding path program 1 times [2021-12-22 09:20:43,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:43,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98987574] [2021-12-22 09:20:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:43,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 09:20:44,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:44,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98987574] [2021-12-22 09:20:44,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98987574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:44,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:44,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:20:44,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278669117] [2021-12-22 09:20:44,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:44,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:20:44,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:44,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:20:44,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:20:44,121 INFO L87 Difference]: Start difference. First operand 23962 states and 28243 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:50,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:50,060 INFO L93 Difference]: Finished difference Result 89064 states and 105284 transitions. [2021-12-22 09:20:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:20:50,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 347 [2021-12-22 09:20:50,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:50,155 INFO L225 Difference]: With dead ends: 89064 [2021-12-22 09:20:50,156 INFO L226 Difference]: Without dead ends: 65891 [2021-12-22 09:20:50,185 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 [2021-12-22 09:20:50,188 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 1743 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 6025 mSolverCounterSat, 1214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 7239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1214 IncrementalHoareTripleChecker+Valid, 6025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:50,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1743 Valid, 638 Invalid, 7239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1214 Valid, 6025 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-22 09:20:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65891 states. [2021-12-22 09:20:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65891 to 64189. [2021-12-22 09:20:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64189 states, 64188 states have (on average 1.1559325730666168) internal successors, (74197), 64188 states have internal predecessors, (74197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64189 states to 64189 states and 74197 transitions. [2021-12-22 09:20:50,894 INFO L78 Accepts]: Start accepts. Automaton has 64189 states and 74197 transitions. Word has length 347 [2021-12-22 09:20:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:50,896 INFO L470 AbstractCegarLoop]: Abstraction has 64189 states and 74197 transitions. [2021-12-22 09:20:50,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 64189 states and 74197 transitions. [2021-12-22 09:20:50,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-22 09:20:50,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:50,902 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-22 09:20:50,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:20:50,902 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash 976872075, now seen corresponding path program 1 times [2021-12-22 09:20:50,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:50,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554554273] [2021-12-22 09:20:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:50,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-22 09:20:51,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:51,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554554273] [2021-12-22 09:20:51,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554554273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:51,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:51,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:20:51,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057254460] [2021-12-22 09:20:51,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:51,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:51,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:51,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:51,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:51,010 INFO L87 Difference]: Start difference. First operand 64189 states and 74197 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:54,277 INFO L93 Difference]: Finished difference Result 140990 states and 162392 transitions. [2021-12-22 09:20:54,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:54,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 347 [2021-12-22 09:20:54,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:54,592 INFO L225 Difference]: With dead ends: 140990 [2021-12-22 09:20:54,597 INFO L226 Difference]: Without dead ends: 77590 [2021-12-22 09:20:54,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:54,676 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 728 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:54,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1198 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2704 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:20:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77590 states. [2021-12-22 09:20:55,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77590 to 76794. [2021-12-22 09:20:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76794 states, 76793 states have (on average 1.1395700128918) internal successors, (87511), 76793 states have internal predecessors, (87511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76794 states to 76794 states and 87511 transitions. [2021-12-22 09:20:55,474 INFO L78 Accepts]: Start accepts. Automaton has 76794 states and 87511 transitions. Word has length 347 [2021-12-22 09:20:55,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:55,474 INFO L470 AbstractCegarLoop]: Abstraction has 76794 states and 87511 transitions. [2021-12-22 09:20:55,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 76794 states and 87511 transitions. [2021-12-22 09:20:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-12-22 09:20:55,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:55,479 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 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] [2021-12-22 09:20:55,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:20:55,480 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:55,480 INFO L85 PathProgramCache]: Analyzing trace with hash -813973343, now seen corresponding path program 1 times [2021-12-22 09:20:55,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:55,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372239179] [2021-12-22 09:20:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:55,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 264 proven. 113 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 09:20:55,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:55,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372239179] [2021-12-22 09:20:55,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372239179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:20:55,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893427241] [2021-12-22 09:20:55,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:55,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:20:55,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:20:55,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:20:55,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:20:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:56,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:20:56,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:20:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-22 09:20:56,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:20:56,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893427241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:56,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:20:56,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-22 09:20:56,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714162074] [2021-12-22 09:20:56,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:56,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:56,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:56,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:56,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:20:56,553 INFO L87 Difference]: Start difference. First operand 76794 states and 87511 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:59,304 INFO L93 Difference]: Finished difference Result 152797 states and 174227 transitions. [2021-12-22 09:20:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:59,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 376 [2021-12-22 09:20:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:59,398 INFO L225 Difference]: With dead ends: 152797 [2021-12-22 09:20:59,399 INFO L226 Difference]: Without dead ends: 76792 [2021-12-22 09:20:59,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:20:59,430 INFO L933 BasicCegarLoop]: 1362 mSDtfsCounter, 1122 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:59,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 1443 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:20:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76792 states. [2021-12-22 09:21:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76792 to 76004. [2021-12-22 09:21:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76004 states, 76003 states have (on average 1.1082325697669828) internal successors, (84229), 76003 states have internal predecessors, (84229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76004 states to 76004 states and 84229 transitions. [2021-12-22 09:21:00,356 INFO L78 Accepts]: Start accepts. Automaton has 76004 states and 84229 transitions. Word has length 376 [2021-12-22 09:21:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:21:00,356 INFO L470 AbstractCegarLoop]: Abstraction has 76004 states and 84229 transitions. [2021-12-22 09:21:00,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 76004 states and 84229 transitions. [2021-12-22 09:21:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-12-22 09:21:00,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:21:00,467 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-22 09:21:00,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:21:00,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:21:00,668 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:21:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:21:00,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2094899295, now seen corresponding path program 1 times [2021-12-22 09:21:00,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:21:00,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371366563] [2021-12-22 09:21:00,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:21:00,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:21:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:21:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 520 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-22 09:21:00,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:21:00,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371366563] [2021-12-22 09:21:00,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371366563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:21:00,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:21:00,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:21:00,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602487139] [2021-12-22 09:21:00,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:21:00,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:21:00,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:21:00,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:21:00,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:21:00,791 INFO L87 Difference]: Start difference. First operand 76004 states and 84229 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:21:04,158 INFO L93 Difference]: Finished difference Result 170117 states and 190568 transitions. [2021-12-22 09:21:04,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:21:04,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 406 [2021-12-22 09:21:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:21:04,332 INFO L225 Difference]: With dead ends: 170117 [2021-12-22 09:21:04,332 INFO L226 Difference]: Without dead ends: 94902 [2021-12-22 09:21:04,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:21:04,383 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 905 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:21:04,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 907 Invalid, 3359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 09:21:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94902 states. [2021-12-22 09:21:05,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94902 to 94884. [2021-12-22 09:21:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94884 states, 94883 states have (on average 1.114235426788782) internal successors, (105722), 94883 states have internal predecessors, (105722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94884 states to 94884 states and 105722 transitions. [2021-12-22 09:21:05,560 INFO L78 Accepts]: Start accepts. Automaton has 94884 states and 105722 transitions. Word has length 406 [2021-12-22 09:21:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:21:05,561 INFO L470 AbstractCegarLoop]: Abstraction has 94884 states and 105722 transitions. [2021-12-22 09:21:05,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 94884 states and 105722 transitions. [2021-12-22 09:21:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-12-22 09:21:05,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:21:05,569 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 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] [2021-12-22 09:21:05,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:21:05,569 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:21:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:21:05,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1357683298, now seen corresponding path program 1 times [2021-12-22 09:21:05,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:21:05,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989120026] [2021-12-22 09:21:05,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:21:05,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:21:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:21:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 304 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 09:21:05,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:21:05,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989120026] [2021-12-22 09:21:05,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989120026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:21:05,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717964465] [2021-12-22 09:21:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:21:05,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:21:05,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:21:05,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:21:05,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:21:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:21:06,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:21:06,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:21:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-22 09:21:07,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:21:07,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717964465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:21:07,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:21:07,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-22 09:21:07,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638758683] [2021-12-22 09:21:07,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:21:07,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:21:07,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:21:07,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:21:07,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:21:07,350 INFO L87 Difference]: Start difference. First operand 94884 states and 105722 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:21:10,325 INFO L93 Difference]: Finished difference Result 177965 states and 199224 transitions. [2021-12-22 09:21:10,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:21:10,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 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 439 [2021-12-22 09:21:10,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:21:10,447 INFO L225 Difference]: With dead ends: 177965 [2021-12-22 09:21:10,447 INFO L226 Difference]: Without dead ends: 98045 [2021-12-22 09:21:10,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:21:10,472 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 643 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 2589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:21:10,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 1184 Invalid, 2589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2476 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:21:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98045 states. [2021-12-22 09:21:11,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98045 to 98036. [2021-12-22 09:21:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98036 states, 98035 states have (on average 1.1118886112102822) internal successors, (109004), 98035 states have internal predecessors, (109004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98036 states to 98036 states and 109004 transitions. [2021-12-22 09:21:11,667 INFO L78 Accepts]: Start accepts. Automaton has 98036 states and 109004 transitions. Word has length 439 [2021-12-22 09:21:11,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:21:11,667 INFO L470 AbstractCegarLoop]: Abstraction has 98036 states and 109004 transitions. [2021-12-22 09:21:11,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:11,668 INFO L276 IsEmpty]: Start isEmpty. Operand 98036 states and 109004 transitions. [2021-12-22 09:21:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-12-22 09:21:11,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:21:11,674 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1] [2021-12-22 09:21:11,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:21:11,888 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,SelfDestructingSolverStorable10 [2021-12-22 09:21:11,889 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:21:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:21:11,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1957989732, now seen corresponding path program 1 times [2021-12-22 09:21:11,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:21:11,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068689867] [2021-12-22 09:21:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:21:11,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:21:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:21:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-22 09:21:12,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:21:12,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068689867] [2021-12-22 09:21:12,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068689867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:21:12,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:21:12,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:21:12,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376112619] [2021-12-22 09:21:12,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:21:12,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:21:12,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:21:12,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:21:12,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:21:12,044 INFO L87 Difference]: Start difference. First operand 98036 states and 109004 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:21:15,589 INFO L93 Difference]: Finished difference Result 195292 states and 217235 transitions. [2021-12-22 09:21:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:21:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 444 [2021-12-22 09:21:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:21:15,707 INFO L225 Difference]: With dead ends: 195292 [2021-12-22 09:21:15,707 INFO L226 Difference]: Without dead ends: 98045 [2021-12-22 09:21:15,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:21:15,738 INFO L933 BasicCegarLoop]: 1740 mSDtfsCounter, 793 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:21:15,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 1891 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-22 09:21:15,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98045 states. [2021-12-22 09:21:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98045 to 96452. [2021-12-22 09:21:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96452 states, 96451 states have (on average 1.08021689769935) internal successors, (104188), 96451 states have internal predecessors, (104188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96452 states to 96452 states and 104188 transitions. [2021-12-22 09:21:16,741 INFO L78 Accepts]: Start accepts. Automaton has 96452 states and 104188 transitions. Word has length 444 [2021-12-22 09:21:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:21:16,742 INFO L470 AbstractCegarLoop]: Abstraction has 96452 states and 104188 transitions. [2021-12-22 09:21:16,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 96452 states and 104188 transitions. [2021-12-22 09:21:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-12-22 09:21:16,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:21:16,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:21:16,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:21:16,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:21:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:21:16,749 INFO L85 PathProgramCache]: Analyzing trace with hash -706087610, now seen corresponding path program 1 times [2021-12-22 09:21:16,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:21:16,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142965094] [2021-12-22 09:21:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:21:16,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:21:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:21:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-22 09:21:17,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:21:17,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142965094] [2021-12-22 09:21:17,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142965094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:21:17,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:21:17,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:21:17,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806586017] [2021-12-22 09:21:17,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:21:17,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:21:17,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:21:17,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:21:17,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:21:17,120 INFO L87 Difference]: Start difference. First operand 96452 states and 104188 transitions. Second operand has 4 states, 4 states have (on average 90.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)