./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label16.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 8986a14436e34fef464bf499036d3f2f22e9dee8c68dd84a0eb0b1e3795f6f62 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:38:37,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:38:37,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:38:37,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:38:37,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:38:37,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:38:37,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:38:37,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:38:37,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:38:37,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:38:37,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:38:37,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:38:37,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:38:37,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:38:37,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:38:37,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:38:37,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:38:37,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:38:37,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:38:37,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:38:37,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:38:37,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:38:37,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:38:37,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:38:37,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:38:37,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:38:37,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:38:37,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:38:37,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:38:37,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:38:37,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:38:37,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:38:37,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:38:37,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:38:37,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:38:37,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:38:37,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:38:37,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:38:37,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:38:37,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:38:37,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:38:37,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:38:37,176 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:38:37,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:38:37,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:38:37,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:38:37,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:38:37,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:38:37,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:38:37,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:38:37,182 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:38:37,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:38:37,183 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:38:37,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:38:37,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:38:37,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:38:37,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:38:37,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:38:37,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:38:37,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:38:37,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:38:37,185 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:38:37,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:38:37,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:38:37,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:38:37,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:38:37,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:38:37,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:38:37,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:38:37,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:38:37,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:38:37,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:38:37,188 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:38:37,188 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:38:37,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:38:37,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:38:37,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8986a14436e34fef464bf499036d3f2f22e9dee8c68dd84a0eb0b1e3795f6f62 [2021-12-15 09:38:37,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:38:37,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:38:37,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:38:37,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:38:37,468 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:38:37,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label16.c [2021-12-15 09:38:37,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e8f6b326/e0187aaf0ce9478397ba3230bcd8a377/FLAGb570d466a [2021-12-15 09:38:38,223 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:38:38,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label16.c [2021-12-15 09:38:38,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e8f6b326/e0187aaf0ce9478397ba3230bcd8a377/FLAGb570d466a [2021-12-15 09:38:38,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e8f6b326/e0187aaf0ce9478397ba3230bcd8a377 [2021-12-15 09:38:38,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:38:38,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:38:38,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:38:38,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:38:38,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:38:38,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:38:38" (1/1) ... [2021-12-15 09:38:38,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5869b512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:38, skipping insertion in model container [2021-12-15 09:38:38,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:38:38" (1/1) ... [2021-12-15 09:38:38,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:38:38,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:38:38,834 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label16.c[8006,8019] [2021-12-15 09:38:39,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:38:39,524 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:38:39,557 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label16.c[8006,8019] [2021-12-15 09:38:39,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:38:39,941 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:38:39,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39 WrapperNode [2021-12-15 09:38:39,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:38:39,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:38:39,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:38:39,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:38:39,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39" (1/1) ... [2021-12-15 09:38:40,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39" (1/1) ... [2021-12-15 09:38:40,312 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 09:38:40,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:38:40,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:38:40,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:38:40,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:38:40,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39" (1/1) ... [2021-12-15 09:38:40,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39" (1/1) ... [2021-12-15 09:38:40,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39" (1/1) ... [2021-12-15 09:38:40,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39" (1/1) ... [2021-12-15 09:38:40,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39" (1/1) ... [2021-12-15 09:38:40,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39" (1/1) ... [2021-12-15 09:38:40,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39" (1/1) ... [2021-12-15 09:38:40,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:38:40,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:38:40,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:38:40,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:38:40,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39" (1/1) ... [2021-12-15 09:38:40,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:38:40,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:38:40,729 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) [2021-12-15 09:38:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:38:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:38:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:38:40,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:38:40,752 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 [2021-12-15 09:38:40,929 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:38:40,954 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:38:44,055 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:38:44,104 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:38:44,104 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:38:44,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:38:44 BoogieIcfgContainer [2021-12-15 09:38:44,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:38:44,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:38:44,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:38:44,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:38:44,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:38:38" (1/3) ... [2021-12-15 09:38:44,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe38eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:38:44, skipping insertion in model container [2021-12-15 09:38:44,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:38:39" (2/3) ... [2021-12-15 09:38:44,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe38eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:38:44, skipping insertion in model container [2021-12-15 09:38:44,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:38:44" (3/3) ... [2021-12-15 09:38:44,121 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label16.c [2021-12-15 09:38:44,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:38:44,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:38:44,179 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:38:44,185 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 [2021-12-15 09:38:44,186 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:38:44,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 09:38:44,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:44,221 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:44,222 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:44,227 INFO L85 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2021-12-15 09:38:44,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:44,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832371897] [2021-12-15 09:38:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:44,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:38:44,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:44,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832371897] [2021-12-15 09:38:44,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832371897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:44,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:44,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:38:44,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309217603] [2021-12-15 09:38:44,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:44,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:44,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:44,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:38:44,531 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:47,922 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2021-12-15 09:38:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-15 09:38:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:47,957 INFO L225 Difference]: With dead ends: 2404 [2021-12-15 09:38:47,957 INFO L226 Difference]: Without dead ends: 1506 [2021-12-15 09:38:47,966 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 [2021-12-15 09:38:47,970 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 755 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:47,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 525 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 09:38:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-15 09:38:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-15 09:38:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6066445182724252) internal successors, (2418), 1505 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2021-12-15 09:38:48,081 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 65 [2021-12-15 09:38:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:48,082 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2021-12-15 09:38:48,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:48,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2021-12-15 09:38:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-15 09:38:48,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:48,090 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:48,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:38:48,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash -394143339, now seen corresponding path program 1 times [2021-12-15 09:38:48,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:48,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937042614] [2021-12-15 09:38:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:48,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:38:48,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:48,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937042614] [2021-12-15 09:38:48,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937042614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:48,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:48,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:48,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819302788] [2021-12-15 09:38:48,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:48,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:38:48,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:48,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:38:48,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:38:48,358 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:51,483 INFO L93 Difference]: Finished difference Result 3771 states and 5823 transitions. [2021-12-15 09:38:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:38:51,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-15 09:38:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:51,492 INFO L225 Difference]: With dead ends: 3771 [2021-12-15 09:38:51,493 INFO L226 Difference]: Without dead ends: 2267 [2021-12-15 09:38:51,495 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 [2021-12-15 09:38:51,496 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1361 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:51,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1645 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:38:51,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-12-15 09:38:51,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2257. [2021-12-15 09:38:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4073581560283688) internal successors, (3175), 2256 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3175 transitions. [2021-12-15 09:38:51,545 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3175 transitions. Word has length 140 [2021-12-15 09:38:51,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:51,548 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3175 transitions. [2021-12-15 09:38:51,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:51,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3175 transitions. [2021-12-15 09:38:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-15 09:38:51,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:51,558 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, 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] [2021-12-15 09:38:51,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:38:51,561 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:51,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:51,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1771488986, now seen corresponding path program 1 times [2021-12-15 09:38:51,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:51,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820349499] [2021-12-15 09:38:51,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:51,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-15 09:38:51,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:51,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820349499] [2021-12-15 09:38:51,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820349499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:38:51,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068268344] [2021-12-15 09:38:51,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:51,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:38:51,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:38:51,760 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) [2021-12-15 09:38:51,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:38:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:38:51,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:38:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-15 09:38:52,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:38:52,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068268344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:52,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:38:52,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:38:52,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338916974] [2021-12-15 09:38:52,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:52,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:38:52,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:52,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:38:52,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:38:52,373 INFO L87 Difference]: Start difference. First operand 2257 states and 3175 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:55,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:55,249 INFO L93 Difference]: Finished difference Result 5263 states and 8006 transitions. [2021-12-15 09:38:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:38:55,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-12-15 09:38:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:55,265 INFO L225 Difference]: With dead ends: 5263 [2021-12-15 09:38:55,265 INFO L226 Difference]: Without dead ends: 3759 [2021-12-15 09:38:55,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:38:55,269 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 662 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:55,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 511 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:38:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-12-15 09:38:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2021-12-15 09:38:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3419372006386376) internal successors, (5043), 3758 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5043 transitions. [2021-12-15 09:38:55,369 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5043 transitions. Word has length 206 [2021-12-15 09:38:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:55,370 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5043 transitions. [2021-12-15 09:38:55,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5043 transitions. [2021-12-15 09:38:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-15 09:38:55,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:55,373 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:38:55,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:38:55,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:38:55,591 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:55,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:55,593 INFO L85 PathProgramCache]: Analyzing trace with hash 547017443, now seen corresponding path program 1 times [2021-12-15 09:38:55,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:55,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541605254] [2021-12-15 09:38:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:55,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-15 09:38:55,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:55,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541605254] [2021-12-15 09:38:55,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541605254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:55,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:55,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:55,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820454238] [2021-12-15 09:38:55,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:55,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:38:55,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:55,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:38:55,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:38:55,708 INFO L87 Difference]: Start difference. First operand 3759 states and 5043 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:38:58,840 INFO L93 Difference]: Finished difference Result 8304 states and 11184 transitions. [2021-12-15 09:38:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:38:58,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-12-15 09:38:58,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:38:58,859 INFO L225 Difference]: With dead ends: 8304 [2021-12-15 09:38:58,859 INFO L226 Difference]: Without dead ends: 5261 [2021-12-15 09:38:58,865 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 [2021-12-15 09:38:58,866 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3804 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 4011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 3804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:38:58,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 712 Invalid, 4011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 3804 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:38:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-12-15 09:38:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-12-15 09:38:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.2543726235741446) internal successors, (6598), 5260 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6598 transitions. [2021-12-15 09:38:58,957 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6598 transitions. Word has length 211 [2021-12-15 09:38:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:38:58,957 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 6598 transitions. [2021-12-15 09:38:58,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:38:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6598 transitions. [2021-12-15 09:38:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-12-15 09:38:58,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:38:58,961 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:38:58,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:38:58,961 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:38:58,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:38:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1350478634, now seen corresponding path program 1 times [2021-12-15 09:38:58,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:38:58,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253176901] [2021-12-15 09:38:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:38:58,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:38:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:38:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:38:59,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:38:59,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253176901] [2021-12-15 09:38:59,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253176901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:38:59,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:38:59,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:38:59,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623610337] [2021-12-15 09:38:59,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:38:59,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:38:59,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:38:59,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:38:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:38:59,101 INFO L87 Difference]: Start difference. First operand 5261 states and 6598 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:02,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:02,200 INFO L93 Difference]: Finished difference Result 12849 states and 16723 transitions. [2021-12-15 09:39:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:39:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 277 [2021-12-15 09:39:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:02,226 INFO L225 Difference]: With dead ends: 12849 [2021-12-15 09:39:02,227 INFO L226 Difference]: Without dead ends: 8267 [2021-12-15 09:39:02,234 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 [2021-12-15 09:39:02,235 INFO L933 BasicCegarLoop]: 491 mSDtfsCounter, 851 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3468 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 4021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 3468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:02,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 506 Invalid, 4021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 3468 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:39:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-12-15 09:39:02,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 8265. [2021-12-15 09:39:02,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8265 states, 8264 states have (on average 1.222894482090997) internal successors, (10106), 8264 states have internal predecessors, (10106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 10106 transitions. [2021-12-15 09:39:02,378 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 10106 transitions. Word has length 277 [2021-12-15 09:39:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:02,379 INFO L470 AbstractCegarLoop]: Abstraction has 8265 states and 10106 transitions. [2021-12-15 09:39:02,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 10106 transitions. [2021-12-15 09:39:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-15 09:39:02,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:02,383 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:02,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:39:02,383 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:02,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1934577750, now seen corresponding path program 1 times [2021-12-15 09:39:02,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:02,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138461399] [2021-12-15 09:39:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:02,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 09:39:02,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:02,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138461399] [2021-12-15 09:39:02,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138461399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:02,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:02,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:39:02,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429555682] [2021-12-15 09:39:02,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:02,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:02,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:02,487 INFO L87 Difference]: Start difference. First operand 8265 states and 10106 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:05,020 INFO L93 Difference]: Finished difference Result 23287 states and 28801 transitions. [2021-12-15 09:39:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:05,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 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 280 [2021-12-15 09:39:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:05,058 INFO L225 Difference]: With dead ends: 23287 [2021-12-15 09:39:05,058 INFO L226 Difference]: Without dead ends: 15775 [2021-12-15 09:39:05,067 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 [2021-12-15 09:39:05,068 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 693 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:05,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 423 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:39:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15775 states. [2021-12-15 09:39:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15775 to 14273. [2021-12-15 09:39:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 1.165148542600897) internal successors, (16629), 14272 states have internal predecessors, (16629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 16629 transitions. [2021-12-15 09:39:05,292 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 16629 transitions. Word has length 280 [2021-12-15 09:39:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:05,293 INFO L470 AbstractCegarLoop]: Abstraction has 14273 states and 16629 transitions. [2021-12-15 09:39:05,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 16629 transitions. [2021-12-15 09:39:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-12-15 09:39:05,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:05,298 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:05,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:39:05,298 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:05,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:05,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1123572077, now seen corresponding path program 1 times [2021-12-15 09:39:05,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:05,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554073032] [2021-12-15 09:39:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:05,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:39:05,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:05,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554073032] [2021-12-15 09:39:05,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554073032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:05,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:05,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:05,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614504407] [2021-12-15 09:39:05,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:05,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:05,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:05,430 INFO L87 Difference]: Start difference. First operand 14273 states and 16629 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:08,455 INFO L93 Difference]: Finished difference Result 41311 states and 48370 transitions. [2021-12-15 09:39:08,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:08,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 291 [2021-12-15 09:39:08,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:08,505 INFO L225 Difference]: With dead ends: 41311 [2021-12-15 09:39:08,505 INFO L226 Difference]: Without dead ends: 27791 [2021-12-15 09:39:08,518 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 [2021-12-15 09:39:08,519 INFO L933 BasicCegarLoop]: 1378 mSDtfsCounter, 668 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2720 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 2720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:08,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 1385 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 2720 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:39:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27791 states. [2021-12-15 09:39:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27791 to 25538. [2021-12-15 09:39:08,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25538 states, 25537 states have (on average 1.1548341621960292) internal successors, (29491), 25537 states have internal predecessors, (29491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25538 states to 25538 states and 29491 transitions. [2021-12-15 09:39:08,891 INFO L78 Accepts]: Start accepts. Automaton has 25538 states and 29491 transitions. Word has length 291 [2021-12-15 09:39:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:08,892 INFO L470 AbstractCegarLoop]: Abstraction has 25538 states and 29491 transitions. [2021-12-15 09:39:08,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 25538 states and 29491 transitions. [2021-12-15 09:39:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-12-15 09:39:08,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:08,897 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:08,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:39:08,897 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:08,898 INFO L85 PathProgramCache]: Analyzing trace with hash -887404957, now seen corresponding path program 1 times [2021-12-15 09:39:08,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:08,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806363984] [2021-12-15 09:39:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:08,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 09:39:08,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:08,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806363984] [2021-12-15 09:39:08,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806363984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:08,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:08,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:08,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594257612] [2021-12-15 09:39:08,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:09,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:09,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:09,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:09,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:09,001 INFO L87 Difference]: Start difference. First operand 25538 states and 29491 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:11,880 INFO L93 Difference]: Finished difference Result 62339 states and 72877 transitions. [2021-12-15 09:39:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:11,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2021-12-15 09:39:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:11,938 INFO L225 Difference]: With dead ends: 62339 [2021-12-15 09:39:11,938 INFO L226 Difference]: Without dead ends: 37554 [2021-12-15 09:39:11,956 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 [2021-12-15 09:39:11,960 INFO L933 BasicCegarLoop]: 1313 mSDtfsCounter, 717 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 2840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:11,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 1321 Invalid, 2840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:39:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37554 states. [2021-12-15 09:39:12,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37554 to 36803. [2021-12-15 09:39:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36803 states, 36802 states have (on average 1.134476387152872) internal successors, (41751), 36802 states have internal predecessors, (41751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36803 states to 36803 states and 41751 transitions. [2021-12-15 09:39:12,383 INFO L78 Accepts]: Start accepts. Automaton has 36803 states and 41751 transitions. Word has length 295 [2021-12-15 09:39:12,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:12,384 INFO L470 AbstractCegarLoop]: Abstraction has 36803 states and 41751 transitions. [2021-12-15 09:39:12,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:12,384 INFO L276 IsEmpty]: Start isEmpty. Operand 36803 states and 41751 transitions. [2021-12-15 09:39:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-15 09:39:12,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:12,390 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, 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] [2021-12-15 09:39:12,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:39:12,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:12,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1261787780, now seen corresponding path program 1 times [2021-12-15 09:39:12,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:12,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63754280] [2021-12-15 09:39:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:12,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-15 09:39:12,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:12,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63754280] [2021-12-15 09:39:12,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63754280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:12,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:12,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:12,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792544514] [2021-12-15 09:39:12,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:12,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:12,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:12,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:12,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:12,531 INFO L87 Difference]: Start difference. First operand 36803 states and 41751 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:15,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:15,124 INFO L93 Difference]: Finished difference Result 86371 states and 97274 transitions. [2021-12-15 09:39:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:15,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-12-15 09:39:15,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:15,201 INFO L225 Difference]: With dead ends: 86371 [2021-12-15 09:39:15,201 INFO L226 Difference]: Without dead ends: 50321 [2021-12-15 09:39:15,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:15,231 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 769 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:15,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 209 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:39:15,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50321 states. [2021-12-15 09:39:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50321 to 45064. [2021-12-15 09:39:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45064 states, 45063 states have (on average 1.1143288285289483) internal successors, (50215), 45063 states have internal predecessors, (50215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:15,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45064 states to 45064 states and 50215 transitions. [2021-12-15 09:39:15,779 INFO L78 Accepts]: Start accepts. Automaton has 45064 states and 50215 transitions. Word has length 321 [2021-12-15 09:39:15,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:15,779 INFO L470 AbstractCegarLoop]: Abstraction has 45064 states and 50215 transitions. [2021-12-15 09:39:15,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:15,780 INFO L276 IsEmpty]: Start isEmpty. Operand 45064 states and 50215 transitions. [2021-12-15 09:39:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-12-15 09:39:15,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:15,785 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:39:15,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:39:15,785 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:15,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:15,787 INFO L85 PathProgramCache]: Analyzing trace with hash -595355556, now seen corresponding path program 1 times [2021-12-15 09:39:15,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:15,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669795876] [2021-12-15 09:39:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:15,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 09:39:15,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:15,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669795876] [2021-12-15 09:39:15,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669795876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:15,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:15,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:15,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243940523] [2021-12-15 09:39:15,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:15,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:15,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:15,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:15,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:15,894 INFO L87 Difference]: Start difference. First operand 45064 states and 50215 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:18,489 INFO L93 Difference]: Finished difference Result 109652 states and 123436 transitions. [2021-12-15 09:39:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 364 [2021-12-15 09:39:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:18,576 INFO L225 Difference]: With dead ends: 109652 [2021-12-15 09:39:18,577 INFO L226 Difference]: Without dead ends: 65341 [2021-12-15 09:39:18,615 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 [2021-12-15 09:39:18,616 INFO L933 BasicCegarLoop]: 1205 mSDtfsCounter, 701 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:18,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 1213 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:39:18,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65341 states. [2021-12-15 09:39:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65341 to 64590. [2021-12-15 09:39:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64590 states, 64589 states have (on average 1.097462416200901) internal successors, (70884), 64589 states have internal predecessors, (70884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64590 states to 64590 states and 70884 transitions. [2021-12-15 09:39:19,590 INFO L78 Accepts]: Start accepts. Automaton has 64590 states and 70884 transitions. Word has length 364 [2021-12-15 09:39:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:19,590 INFO L470 AbstractCegarLoop]: Abstraction has 64590 states and 70884 transitions. [2021-12-15 09:39:19,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 64590 states and 70884 transitions. [2021-12-15 09:39:19,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-12-15 09:39:19,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:19,597 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:19,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:39:19,597 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:19,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:19,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1192047628, now seen corresponding path program 1 times [2021-12-15 09:39:19,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:19,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074233870] [2021-12-15 09:39:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:19,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 09:39:19,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:19,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074233870] [2021-12-15 09:39:19,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074233870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:19,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:19,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:19,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000577629] [2021-12-15 09:39:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:19,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:19,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:19,717 INFO L87 Difference]: Start difference. First operand 64590 states and 70884 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:22,841 INFO L93 Difference]: Finished difference Result 157716 states and 173923 transitions. [2021-12-15 09:39:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 396 [2021-12-15 09:39:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:22,951 INFO L225 Difference]: With dead ends: 157716 [2021-12-15 09:39:22,951 INFO L226 Difference]: Without dead ends: 93879 [2021-12-15 09:39:23,004 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 [2021-12-15 09:39:23,005 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 710 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2477 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 2928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:23,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 347 Invalid, 2928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2477 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:39:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93879 states. [2021-12-15 09:39:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93879 to 89373. [2021-12-15 09:39:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89373 states, 89372 states have (on average 1.097871816676364) internal successors, (98119), 89372 states have internal predecessors, (98119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89373 states to 89373 states and 98119 transitions. [2021-12-15 09:39:24,282 INFO L78 Accepts]: Start accepts. Automaton has 89373 states and 98119 transitions. Word has length 396 [2021-12-15 09:39:24,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:24,284 INFO L470 AbstractCegarLoop]: Abstraction has 89373 states and 98119 transitions. [2021-12-15 09:39:24,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:24,284 INFO L276 IsEmpty]: Start isEmpty. Operand 89373 states and 98119 transitions. [2021-12-15 09:39:24,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-12-15 09:39:24,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:24,332 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 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] [2021-12-15 09:39:24,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:39:24,333 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:24,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1893891792, now seen corresponding path program 1 times [2021-12-15 09:39:24,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:24,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625719293] [2021-12-15 09:39:24,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:24,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 499 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 09:39:24,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:24,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625719293] [2021-12-15 09:39:24,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625719293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:24,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:24,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:24,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716164927] [2021-12-15 09:39:24,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:24,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:24,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:24,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:24,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:24,511 INFO L87 Difference]: Start difference. First operand 89373 states and 98119 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:27,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:27,547 INFO L93 Difference]: Finished difference Result 180997 states and 198566 transitions. [2021-12-15 09:39:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:27,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 486 [2021-12-15 09:39:27,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:27,650 INFO L225 Difference]: With dead ends: 180997 [2021-12-15 09:39:27,650 INFO L226 Difference]: Without dead ends: 89373 [2021-12-15 09:39:27,686 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 [2021-12-15 09:39:27,687 INFO L933 BasicCegarLoop]: 1217 mSDtfsCounter, 727 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:27,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 1224 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:39:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89373 states. [2021-12-15 09:39:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89373 to 86369. [2021-12-15 09:39:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86369 states, 86368 states have (on average 1.0624536865505743) internal successors, (91762), 86368 states have internal predecessors, (91762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86369 states to 86369 states and 91762 transitions. [2021-12-15 09:39:28,796 INFO L78 Accepts]: Start accepts. Automaton has 86369 states and 91762 transitions. Word has length 486 [2021-12-15 09:39:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:28,797 INFO L470 AbstractCegarLoop]: Abstraction has 86369 states and 91762 transitions. [2021-12-15 09:39:28,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 86369 states and 91762 transitions. [2021-12-15 09:39:28,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-12-15 09:39:28,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:28,813 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:28,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:39:28,813 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:28,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:28,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1768584227, now seen corresponding path program 1 times [2021-12-15 09:39:28,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:28,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77315366] [2021-12-15 09:39:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:28,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 651 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-15 09:39:28,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:28,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77315366] [2021-12-15 09:39:28,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77315366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:28,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:28,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:28,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440337864] [2021-12-15 09:39:28,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:28,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:28,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:28,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:28,965 INFO L87 Difference]: Start difference. First operand 86369 states and 91762 transitions. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)