./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label36.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/Problem03_label36.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 62e9241ba979767c8bca2756b2edfc882f7b20aa81fc6f783856c8cd54d80552 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:05:14,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:05:14,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:05:15,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:05:15,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:05:15,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:05:15,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:05:15,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:05:15,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:05:15,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:05:15,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:05:15,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:05:15,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:05:15,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:05:15,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:05:15,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:05:15,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:05:15,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:05:15,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:05:15,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:05:15,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:05:15,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:05:15,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:05:15,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:05:15,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:05:15,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:05:15,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:05:15,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:05:15,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:05:15,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:05:15,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:05:15,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:05:15,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:05:15,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:05:15,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:05:15,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:05:15,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:05:15,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:05:15,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:05:15,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:05:15,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:05:15,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:05:15,111 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:05:15,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:05:15,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:05:15,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:05:15,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:05:15,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:05:15,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:05:15,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:05:15,113 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:05:15,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:05:15,114 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:05:15,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:05:15,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:05:15,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:05:15,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:05:15,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:05:15,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:05:15,115 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:05:15,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:05:15,116 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:05:15,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:05:15,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:05:15,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:05:15,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:05:15,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:05:15,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:05:15,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:05:15,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:05:15,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:05:15,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:05:15,118 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:05:15,118 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:05:15,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:05:15,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:05:15,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62e9241ba979767c8bca2756b2edfc882f7b20aa81fc6f783856c8cd54d80552 [2021-12-15 09:05:15,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:05:15,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:05:15,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:05:15,321 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:05:15,322 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:05:15,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label36.c [2021-12-15 09:05:15,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b193a9bd/9a05dca7371b4c9686356c68d84578fd/FLAG9f42951b4 [2021-12-15 09:05:15,821 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:05:15,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label36.c [2021-12-15 09:05:15,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b193a9bd/9a05dca7371b4c9686356c68d84578fd/FLAG9f42951b4 [2021-12-15 09:05:16,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b193a9bd/9a05dca7371b4c9686356c68d84578fd [2021-12-15 09:05:16,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:05:16,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:05:16,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:05:16,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:05:16,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:05:16,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:16,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8367d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16, skipping insertion in model container [2021-12-15 09:05:16,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:16,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:05:16,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:05:16,718 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/Problem03_label36.c[58393,58406] [2021-12-15 09:05:16,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:05:16,752 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:05:16,893 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/Problem03_label36.c[58393,58406] [2021-12-15 09:05:16,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:05:16,914 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:05:16,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16 WrapperNode [2021-12-15 09:05:16,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:05:16,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:05:16,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:05:16,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:05:16,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:16,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:17,051 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 09:05:17,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:05:17,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:05:17,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:05:17,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:05:17,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:17,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:17,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:17,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:17,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:17,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:17,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:17,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:05:17,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:05:17,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:05:17,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:05:17,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16" (1/1) ... [2021-12-15 09:05:17,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:05:17,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:17,169 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 09:05:17,193 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 09:05:17,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:05:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:05:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:05:17,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:05:17,297 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:05:17,298 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:05:18,294 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:05:18,304 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:05:18,305 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:05:18,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:05:18 BoogieIcfgContainer [2021-12-15 09:05:18,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:05:18,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:05:18,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:05:18,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:05:18,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:05:16" (1/3) ... [2021-12-15 09:05:18,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cdab79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:05:18, skipping insertion in model container [2021-12-15 09:05:18,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:05:16" (2/3) ... [2021-12-15 09:05:18,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cdab79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:05:18, skipping insertion in model container [2021-12-15 09:05:18,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:05:18" (3/3) ... [2021-12-15 09:05:18,314 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label36.c [2021-12-15 09:05:18,317 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:05:18,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:05:18,364 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:05:18,370 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 09:05:18,371 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:05:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 09:05:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-15 09:05:18,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:18,407 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:18,408 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:18,412 INFO L85 PathProgramCache]: Analyzing trace with hash -946453597, now seen corresponding path program 1 times [2021-12-15 09:05:18,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:18,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129423676] [2021-12-15 09:05:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:18,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:18,791 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 09:05:18,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:18,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129423676] [2021-12-15 09:05:18,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129423676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:18,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:18,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:18,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917407433] [2021-12-15 09:05:18,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:18,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:18,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:18,824 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 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 09:05:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:19,625 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2021-12-15 09:05:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:19,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 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 179 [2021-12-15 09:05:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:19,637 INFO L225 Difference]: With dead ends: 836 [2021-12-15 09:05:19,637 INFO L226 Difference]: Without dead ends: 457 [2021-12-15 09:05:19,640 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 09:05:19,643 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 104 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:19,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-15 09:05:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2021-12-15 09:05:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 0 states have call successors, (0), 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 09:05:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2021-12-15 09:05:19,693 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 179 [2021-12-15 09:05:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:19,694 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2021-12-15 09:05:19,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 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 09:05:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2021-12-15 09:05:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-15 09:05:19,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:19,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:19,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:05:19,704 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1228011159, now seen corresponding path program 1 times [2021-12-15 09:05:19,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:19,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599956221] [2021-12-15 09:05:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:19,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:19,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:19,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599956221] [2021-12-15 09:05:19,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599956221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:19,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:19,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:19,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122933565] [2021-12-15 09:05:19,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:19,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:19,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:19,786 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 09:05:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:20,378 INFO L93 Difference]: Finished difference Result 1337 states and 2139 transitions. [2021-12-15 09:05:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:20,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2021-12-15 09:05:20,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:20,382 INFO L225 Difference]: With dead ends: 1337 [2021-12-15 09:05:20,382 INFO L226 Difference]: Without dead ends: 888 [2021-12-15 09:05:20,383 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 09:05:20,384 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 283 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:20,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 135 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-12-15 09:05:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 880. [2021-12-15 09:05:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.57679180887372) internal successors, (1386), 879 states have internal predecessors, (1386), 0 states have call successors, (0), 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 09:05:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1386 transitions. [2021-12-15 09:05:20,417 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1386 transitions. Word has length 185 [2021-12-15 09:05:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:20,418 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1386 transitions. [2021-12-15 09:05:20,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 09:05:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1386 transitions. [2021-12-15 09:05:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-15 09:05:20,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:20,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:20,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:05:20,421 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:20,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1574327415, now seen corresponding path program 1 times [2021-12-15 09:05:20,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:20,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620979660] [2021-12-15 09:05:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:20,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:20,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:20,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620979660] [2021-12-15 09:05:20,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620979660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:20,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:20,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:20,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486874754] [2021-12-15 09:05:20,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:20,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:20,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:20,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:20,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:20,481 INFO L87 Difference]: Start difference. First operand 880 states and 1386 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 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 09:05:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:21,079 INFO L93 Difference]: Finished difference Result 2604 states and 4113 transitions. [2021-12-15 09:05:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:21,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 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 189 [2021-12-15 09:05:21,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:21,084 INFO L225 Difference]: With dead ends: 2604 [2021-12-15 09:05:21,084 INFO L226 Difference]: Without dead ends: 1726 [2021-12-15 09:05:21,085 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 09:05:21,086 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 219 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:21,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 144 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-12-15 09:05:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1714. [2021-12-15 09:05:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.521891418563923) internal successors, (2607), 1713 states have internal predecessors, (2607), 0 states have call successors, (0), 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 09:05:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2607 transitions. [2021-12-15 09:05:21,110 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2607 transitions. Word has length 189 [2021-12-15 09:05:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:21,111 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 2607 transitions. [2021-12-15 09:05:21,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 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 09:05:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2607 transitions. [2021-12-15 09:05:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-15 09:05:21,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:21,113 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:21,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:05:21,114 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:21,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash -647088185, now seen corresponding path program 1 times [2021-12-15 09:05:21,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:21,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039950798] [2021-12-15 09:05:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:21,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:05:21,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039950798] [2021-12-15 09:05:21,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039950798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:21,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:21,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:21,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630263578] [2021-12-15 09:05:21,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:21,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:21,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:21,159 INFO L87 Difference]: Start difference. First operand 1714 states and 2607 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 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 09:05:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:21,736 INFO L93 Difference]: Finished difference Result 5111 states and 7782 transitions. [2021-12-15 09:05:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:21,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 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 190 [2021-12-15 09:05:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:21,745 INFO L225 Difference]: With dead ends: 5111 [2021-12-15 09:05:21,746 INFO L226 Difference]: Without dead ends: 3399 [2021-12-15 09:05:21,748 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 09:05:21,749 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 267 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:21,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 170 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3399 states. [2021-12-15 09:05:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3399 to 3387. [2021-12-15 09:05:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.4465445953927938) internal successors, (4898), 3386 states have internal predecessors, (4898), 0 states have call successors, (0), 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 09:05:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 4898 transitions. [2021-12-15 09:05:21,815 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 4898 transitions. Word has length 190 [2021-12-15 09:05:21,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:21,816 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 4898 transitions. [2021-12-15 09:05:21,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 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 09:05:21,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 4898 transitions. [2021-12-15 09:05:21,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-15 09:05:21,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:21,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:21,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:05:21,821 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:21,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:21,821 INFO L85 PathProgramCache]: Analyzing trace with hash -702420505, now seen corresponding path program 1 times [2021-12-15 09:05:21,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:21,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621584823] [2021-12-15 09:05:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:21,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:21,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:21,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621584823] [2021-12-15 09:05:21,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621584823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:21,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:21,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:21,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485287231] [2021-12-15 09:05:21,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:21,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:21,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:21,913 INFO L87 Difference]: Start difference. First operand 3387 states and 4898 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 09:05:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:22,222 INFO L93 Difference]: Finished difference Result 6522 states and 9465 transitions. [2021-12-15 09:05:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:22,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 192 [2021-12-15 09:05:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:22,231 INFO L225 Difference]: With dead ends: 6522 [2021-12-15 09:05:22,231 INFO L226 Difference]: Without dead ends: 3344 [2021-12-15 09:05:22,235 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 09:05:22,236 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:22,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:05:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2021-12-15 09:05:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 3344. [2021-12-15 09:05:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 1.4020341011067903) internal successors, (4687), 3343 states have internal predecessors, (4687), 0 states have call successors, (0), 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 09:05:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 4687 transitions. [2021-12-15 09:05:22,282 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 4687 transitions. Word has length 192 [2021-12-15 09:05:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:22,282 INFO L470 AbstractCegarLoop]: Abstraction has 3344 states and 4687 transitions. [2021-12-15 09:05:22,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 09:05:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 4687 transitions. [2021-12-15 09:05:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-15 09:05:22,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:22,287 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:22,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:05:22,287 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:22,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:22,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1565828286, now seen corresponding path program 1 times [2021-12-15 09:05:22,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:22,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672051072] [2021-12-15 09:05:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:22,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:22,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:22,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672051072] [2021-12-15 09:05:22,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672051072] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:22,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035963615] [2021-12-15 09:05:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:22,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:22,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:22,342 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 09:05:22,344 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 09:05:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:22,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:22,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:05:22,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:22,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035963615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:22,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:22,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:22,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247767714] [2021-12-15 09:05:22,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:22,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:22,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:22,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:22,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:22,881 INFO L87 Difference]: Start difference. First operand 3344 states and 4687 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 09:05:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:23,410 INFO L93 Difference]: Finished difference Result 8125 states and 11479 transitions. [2021-12-15 09:05:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:23,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 196 [2021-12-15 09:05:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:23,423 INFO L225 Difference]: With dead ends: 8125 [2021-12-15 09:05:23,423 INFO L226 Difference]: Without dead ends: 4783 [2021-12-15 09:05:23,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:23,427 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 64 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:23,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 107 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:23,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-12-15 09:05:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4780. [2021-12-15 09:05:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4780 states, 4779 states have (on average 1.3812513078049802) internal successors, (6601), 4779 states have internal predecessors, (6601), 0 states have call successors, (0), 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 09:05:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 6601 transitions. [2021-12-15 09:05:23,502 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 6601 transitions. Word has length 196 [2021-12-15 09:05:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:23,502 INFO L470 AbstractCegarLoop]: Abstraction has 4780 states and 6601 transitions. [2021-12-15 09:05:23,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 09:05:23,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 6601 transitions. [2021-12-15 09:05:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-15 09:05:23,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:23,508 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:23,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 09:05:23,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 09:05:23,728 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash 966227085, now seen corresponding path program 1 times [2021-12-15 09:05:23,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:23,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541073396] [2021-12-15 09:05:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:23,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:05:23,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:23,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541073396] [2021-12-15 09:05:23,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541073396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:23,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:23,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:23,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105231693] [2021-12-15 09:05:23,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:23,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:23,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:23,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:23,783 INFO L87 Difference]: Start difference. First operand 4780 states and 6601 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 09:05:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:24,367 INFO L93 Difference]: Finished difference Result 10985 states and 15346 transitions. [2021-12-15 09:05:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:24,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 200 [2021-12-15 09:05:24,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:24,387 INFO L225 Difference]: With dead ends: 10985 [2021-12-15 09:05:24,387 INFO L226 Difference]: Without dead ends: 6412 [2021-12-15 09:05:24,391 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 09:05:24,392 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 215 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:24,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 341 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6412 states. [2021-12-15 09:05:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6412 to 6408. [2021-12-15 09:05:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6408 states, 6407 states have (on average 1.323084126736382) internal successors, (8477), 6407 states have internal predecessors, (8477), 0 states have call successors, (0), 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 09:05:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6408 states to 6408 states and 8477 transitions. [2021-12-15 09:05:24,493 INFO L78 Accepts]: Start accepts. Automaton has 6408 states and 8477 transitions. Word has length 200 [2021-12-15 09:05:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:24,493 INFO L470 AbstractCegarLoop]: Abstraction has 6408 states and 8477 transitions. [2021-12-15 09:05:24,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 09:05:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6408 states and 8477 transitions. [2021-12-15 09:05:24,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-15 09:05:24,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:24,502 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:24,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:05:24,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:24,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1846501408, now seen corresponding path program 1 times [2021-12-15 09:05:24,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:24,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495620375] [2021-12-15 09:05:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:24,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:24,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:24,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495620375] [2021-12-15 09:05:24,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495620375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:24,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:24,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:24,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834662260] [2021-12-15 09:05:24,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:24,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:24,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:24,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:24,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:24,552 INFO L87 Difference]: Start difference. First operand 6408 states and 8477 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 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 09:05:25,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:25,135 INFO L93 Difference]: Finished difference Result 18148 states and 24110 transitions. [2021-12-15 09:05:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:25,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 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 202 [2021-12-15 09:05:25,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:25,159 INFO L225 Difference]: With dead ends: 18148 [2021-12-15 09:05:25,159 INFO L226 Difference]: Without dead ends: 12150 [2021-12-15 09:05:25,164 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 09:05:25,164 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 241 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:25,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 103 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2021-12-15 09:05:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 12111. [2021-12-15 09:05:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12111 states, 12110 states have (on average 1.3194054500412882) internal successors, (15978), 12110 states have internal predecessors, (15978), 0 states have call successors, (0), 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 09:05:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12111 states to 12111 states and 15978 transitions. [2021-12-15 09:05:25,298 INFO L78 Accepts]: Start accepts. Automaton has 12111 states and 15978 transitions. Word has length 202 [2021-12-15 09:05:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:25,299 INFO L470 AbstractCegarLoop]: Abstraction has 12111 states and 15978 transitions. [2021-12-15 09:05:25,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 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 09:05:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 12111 states and 15978 transitions. [2021-12-15 09:05:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-15 09:05:25,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:25,311 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:25,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:05:25,312 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:25,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1370948497, now seen corresponding path program 1 times [2021-12-15 09:05:25,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:25,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435089364] [2021-12-15 09:05:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:25,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 09:05:25,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:25,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435089364] [2021-12-15 09:05:25,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435089364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:25,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:25,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:25,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078223488] [2021-12-15 09:05:25,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:25,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:25,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:25,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:25,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:25,355 INFO L87 Difference]: Start difference. First operand 12111 states and 15978 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 09:05:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:25,607 INFO L93 Difference]: Finished difference Result 33224 states and 44035 transitions. [2021-12-15 09:05:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:25,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 205 [2021-12-15 09:05:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:25,639 INFO L225 Difference]: With dead ends: 33224 [2021-12-15 09:05:25,639 INFO L226 Difference]: Without dead ends: 22132 [2021-12-15 09:05:25,652 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 09:05:25,653 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 322 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:25,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 528 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 09:05:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22132 states. [2021-12-15 09:05:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22132 to 22113. [2021-12-15 09:05:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22113 states, 22112 states have (on average 1.3226302460202606) internal successors, (29246), 22112 states have internal predecessors, (29246), 0 states have call successors, (0), 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 09:05:25,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22113 states to 22113 states and 29246 transitions. [2021-12-15 09:05:25,928 INFO L78 Accepts]: Start accepts. Automaton has 22113 states and 29246 transitions. Word has length 205 [2021-12-15 09:05:25,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:25,928 INFO L470 AbstractCegarLoop]: Abstraction has 22113 states and 29246 transitions. [2021-12-15 09:05:25,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 09:05:25,929 INFO L276 IsEmpty]: Start isEmpty. Operand 22113 states and 29246 transitions. [2021-12-15 09:05:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-15 09:05:25,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:25,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:25,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:05:25,955 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:25,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:25,956 INFO L85 PathProgramCache]: Analyzing trace with hash -778094728, now seen corresponding path program 1 times [2021-12-15 09:05:25,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:25,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771084334] [2021-12-15 09:05:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:25,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:26,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:26,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771084334] [2021-12-15 09:05:26,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771084334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:26,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:26,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:26,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404506711] [2021-12-15 09:05:26,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:26,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:26,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:26,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:26,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:26,065 INFO L87 Difference]: Start difference. First operand 22113 states and 29246 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:26,798 INFO L93 Difference]: Finished difference Result 51615 states and 68625 transitions. [2021-12-15 09:05:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-12-15 09:05:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:26,843 INFO L225 Difference]: With dead ends: 51615 [2021-12-15 09:05:26,843 INFO L226 Difference]: Without dead ends: 30521 [2021-12-15 09:05:26,855 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 09:05:26,856 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 208 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:26,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 149 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30521 states. [2021-12-15 09:05:27,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30521 to 30462. [2021-12-15 09:05:27,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30462 states, 30461 states have (on average 1.3286169199960605) internal successors, (40471), 30461 states have internal predecessors, (40471), 0 states have call successors, (0), 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 09:05:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30462 states to 30462 states and 40471 transitions. [2021-12-15 09:05:27,277 INFO L78 Accepts]: Start accepts. Automaton has 30462 states and 40471 transitions. Word has length 205 [2021-12-15 09:05:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:27,278 INFO L470 AbstractCegarLoop]: Abstraction has 30462 states and 40471 transitions. [2021-12-15 09:05:27,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 30462 states and 40471 transitions. [2021-12-15 09:05:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-15 09:05:27,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:27,299 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:27,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:05:27,299 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash -367996010, now seen corresponding path program 2 times [2021-12-15 09:05:27,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:27,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997703946] [2021-12-15 09:05:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:27,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:05:27,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997703946] [2021-12-15 09:05:27,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997703946] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935714991] [2021-12-15 09:05:27,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 09:05:27,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:27,351 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:27,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:05:27,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 09:05:27,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 09:05:27,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:27,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 09:05:27,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:27,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935714991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:27,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:27,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:05:27,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639225062] [2021-12-15 09:05:27,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:27,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:27,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:27,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:27,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:27,910 INFO L87 Difference]: Start difference. First operand 30462 states and 40471 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 09:05:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:28,747 INFO L93 Difference]: Finished difference Result 67388 states and 90092 transitions. [2021-12-15 09:05:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:28,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 207 [2021-12-15 09:05:28,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:28,798 INFO L225 Difference]: With dead ends: 67388 [2021-12-15 09:05:28,799 INFO L226 Difference]: Without dead ends: 38355 [2021-12-15 09:05:28,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 207 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 09:05:28,811 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:28,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 376 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38355 states. [2021-12-15 09:05:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38355 to 35306. [2021-12-15 09:05:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35306 states, 35305 states have (on average 1.2336779492989662) internal successors, (43555), 35305 states have internal predecessors, (43555), 0 states have call successors, (0), 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 09:05:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35306 states to 35306 states and 43555 transitions. [2021-12-15 09:05:29,238 INFO L78 Accepts]: Start accepts. Automaton has 35306 states and 43555 transitions. Word has length 207 [2021-12-15 09:05:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:29,238 INFO L470 AbstractCegarLoop]: Abstraction has 35306 states and 43555 transitions. [2021-12-15 09:05:29,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 09:05:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 35306 states and 43555 transitions. [2021-12-15 09:05:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-15 09:05:29,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:29,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:29,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:29,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 09:05:29,478 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1170665858, now seen corresponding path program 1 times [2021-12-15 09:05:29,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:29,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790828559] [2021-12-15 09:05:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:29,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:29,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:29,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790828559] [2021-12-15 09:05:29,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790828559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:29,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:29,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:29,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725718382] [2021-12-15 09:05:29,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:29,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:29,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:29,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:29,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:29,529 INFO L87 Difference]: Start difference. First operand 35306 states and 43555 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 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 09:05:30,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:30,312 INFO L93 Difference]: Finished difference Result 73276 states and 90254 transitions. [2021-12-15 09:05:30,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:30,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 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 209 [2021-12-15 09:05:30,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:30,363 INFO L225 Difference]: With dead ends: 73276 [2021-12-15 09:05:30,364 INFO L226 Difference]: Without dead ends: 40824 [2021-12-15 09:05:30,386 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 09:05:30,387 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 200 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:30,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 137 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40824 states. [2021-12-15 09:05:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40824 to 40813. [2021-12-15 09:05:30,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40813 states, 40812 states have (on average 1.2288297559541312) internal successors, (50151), 40812 states have internal predecessors, (50151), 0 states have call successors, (0), 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 09:05:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40813 states to 40813 states and 50151 transitions. [2021-12-15 09:05:30,966 INFO L78 Accepts]: Start accepts. Automaton has 40813 states and 50151 transitions. Word has length 209 [2021-12-15 09:05:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:30,966 INFO L470 AbstractCegarLoop]: Abstraction has 40813 states and 50151 transitions. [2021-12-15 09:05:30,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 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 09:05:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 40813 states and 50151 transitions. [2021-12-15 09:05:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-15 09:05:30,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:30,989 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:30,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:05:30,990 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:30,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2096332885, now seen corresponding path program 1 times [2021-12-15 09:05:30,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:30,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149864448] [2021-12-15 09:05:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:30,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 09:05:31,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:31,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149864448] [2021-12-15 09:05:31,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149864448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:31,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:31,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:31,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506242745] [2021-12-15 09:05:31,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:31,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:31,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:31,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:31,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:31,054 INFO L87 Difference]: Start difference. First operand 40813 states and 50151 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 09:05:31,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:31,835 INFO L93 Difference]: Finished difference Result 88321 states and 107868 transitions. [2021-12-15 09:05:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:31,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 224 [2021-12-15 09:05:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:31,890 INFO L225 Difference]: With dead ends: 88321 [2021-12-15 09:05:31,890 INFO L226 Difference]: Without dead ends: 48122 [2021-12-15 09:05:31,915 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 09:05:31,915 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 202 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:31,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 132 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:31,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48122 states. [2021-12-15 09:05:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48122 to 47707. [2021-12-15 09:05:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47707 states, 47706 states have (on average 1.2069341382635308) internal successors, (57578), 47706 states have internal predecessors, (57578), 0 states have call successors, (0), 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 09:05:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47707 states to 47707 states and 57578 transitions. [2021-12-15 09:05:32,538 INFO L78 Accepts]: Start accepts. Automaton has 47707 states and 57578 transitions. Word has length 224 [2021-12-15 09:05:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:32,538 INFO L470 AbstractCegarLoop]: Abstraction has 47707 states and 57578 transitions. [2021-12-15 09:05:32,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 09:05:32,538 INFO L276 IsEmpty]: Start isEmpty. Operand 47707 states and 57578 transitions. [2021-12-15 09:05:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-15 09:05:32,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:32,560 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:32,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:05:32,560 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:32,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:32,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2059845864, now seen corresponding path program 1 times [2021-12-15 09:05:32,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:32,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573769285] [2021-12-15 09:05:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:32,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:05:32,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:32,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573769285] [2021-12-15 09:05:32,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573769285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:32,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:32,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:32,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992119603] [2021-12-15 09:05:32,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:32,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:32,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:32,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:32,634 INFO L87 Difference]: Start difference. First operand 47707 states and 57578 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 09:05:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:33,391 INFO L93 Difference]: Finished difference Result 98487 states and 118851 transitions. [2021-12-15 09:05:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:33,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 226 [2021-12-15 09:05:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:33,640 INFO L225 Difference]: With dead ends: 98487 [2021-12-15 09:05:33,640 INFO L226 Difference]: Without dead ends: 57097 [2021-12-15 09:05:33,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:33,677 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 188 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:33,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 138 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57097 states. [2021-12-15 09:05:34,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57097 to 57088. [2021-12-15 09:05:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57088 states, 57087 states have (on average 1.2022001506472577) internal successors, (68630), 57087 states have internal predecessors, (68630), 0 states have call successors, (0), 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 09:05:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57088 states to 57088 states and 68630 transitions. [2021-12-15 09:05:34,444 INFO L78 Accepts]: Start accepts. Automaton has 57088 states and 68630 transitions. Word has length 226 [2021-12-15 09:05:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:34,444 INFO L470 AbstractCegarLoop]: Abstraction has 57088 states and 68630 transitions. [2021-12-15 09:05:34,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 09:05:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 57088 states and 68630 transitions. [2021-12-15 09:05:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-15 09:05:34,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:34,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:34,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:05:34,482 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:34,483 INFO L85 PathProgramCache]: Analyzing trace with hash -766651181, now seen corresponding path program 1 times [2021-12-15 09:05:34,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:34,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468147462] [2021-12-15 09:05:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:34,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:05:34,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:34,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468147462] [2021-12-15 09:05:34,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468147462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:34,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:34,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:34,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860658758] [2021-12-15 09:05:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:34,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:34,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:34,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:34,656 INFO L87 Difference]: Start difference. First operand 57088 states and 68630 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 09:05:35,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:35,431 INFO L93 Difference]: Finished difference Result 128370 states and 157133 transitions. [2021-12-15 09:05:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:35,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 233 [2021-12-15 09:05:35,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:35,510 INFO L225 Difference]: With dead ends: 128370 [2021-12-15 09:05:35,511 INFO L226 Difference]: Without dead ends: 71284 [2021-12-15 09:05:35,548 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 09:05:35,549 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 214 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:35,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 151 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71284 states. [2021-12-15 09:05:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71284 to 70472. [2021-12-15 09:05:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70472 states, 70471 states have (on average 1.176001475784365) internal successors, (82874), 70471 states have internal predecessors, (82874), 0 states have call successors, (0), 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 09:05:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70472 states to 70472 states and 82874 transitions. [2021-12-15 09:05:36,581 INFO L78 Accepts]: Start accepts. Automaton has 70472 states and 82874 transitions. Word has length 233 [2021-12-15 09:05:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:36,581 INFO L470 AbstractCegarLoop]: Abstraction has 70472 states and 82874 transitions. [2021-12-15 09:05:36,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 09:05:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 70472 states and 82874 transitions. [2021-12-15 09:05:36,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-15 09:05:36,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:36,610 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:36,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:05:36,610 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:36,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:36,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1240034219, now seen corresponding path program 1 times [2021-12-15 09:05:36,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:36,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941175084] [2021-12-15 09:05:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:36,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 09:05:36,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:36,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941175084] [2021-12-15 09:05:36,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941175084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:36,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:36,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:36,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959024746] [2021-12-15 09:05:36,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:36,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:36,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:36,669 INFO L87 Difference]: Start difference. First operand 70472 states and 82874 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 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 09:05:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:37,553 INFO L93 Difference]: Finished difference Result 134834 states and 158475 transitions. [2021-12-15 09:05:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 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 243 [2021-12-15 09:05:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:37,626 INFO L225 Difference]: With dead ends: 134834 [2021-12-15 09:05:37,626 INFO L226 Difference]: Without dead ends: 70675 [2021-12-15 09:05:37,654 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 09:05:37,654 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 172 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:37,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 158 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:05:37,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70675 states. [2021-12-15 09:05:38,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70675 to 70472. [2021-12-15 09:05:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70472 states, 70471 states have (on average 1.1759730953158036) internal successors, (82872), 70471 states have internal predecessors, (82872), 0 states have call successors, (0), 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 09:05:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70472 states to 70472 states and 82872 transitions. [2021-12-15 09:05:38,610 INFO L78 Accepts]: Start accepts. Automaton has 70472 states and 82872 transitions. Word has length 243 [2021-12-15 09:05:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:38,610 INFO L470 AbstractCegarLoop]: Abstraction has 70472 states and 82872 transitions. [2021-12-15 09:05:38,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 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 09:05:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 70472 states and 82872 transitions. [2021-12-15 09:05:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-15 09:05:38,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:38,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:38,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:05:38,641 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:38,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1458916128, now seen corresponding path program 1 times [2021-12-15 09:05:38,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:38,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538234668] [2021-12-15 09:05:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:38,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 76 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 09:05:38,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:38,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538234668] [2021-12-15 09:05:38,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538234668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:38,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553980674] [2021-12-15 09:05:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:38,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:38,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:38,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:38,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:05:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:38,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 09:05:39,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:39,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553980674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:39,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:39,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:05:39,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125333098] [2021-12-15 09:05:39,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:39,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:39,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:39,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:39,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:39,084 INFO L87 Difference]: Start difference. First operand 70472 states and 82872 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 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 09:05:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:40,098 INFO L93 Difference]: Finished difference Result 175701 states and 206923 transitions. [2021-12-15 09:05:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 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 250 [2021-12-15 09:05:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:40,243 INFO L225 Difference]: With dead ends: 175701 [2021-12-15 09:05:40,243 INFO L226 Difference]: Without dead ends: 107263 [2021-12-15 09:05:40,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:40,297 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 213 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:40,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 149 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107263 states. [2021-12-15 09:05:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107263 to 94865. [2021-12-15 09:05:41,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94865 states, 94864 states have (on average 1.1642456569404622) internal successors, (110445), 94864 states have internal predecessors, (110445), 0 states have call successors, (0), 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 09:05:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94865 states to 94865 states and 110445 transitions. [2021-12-15 09:05:41,753 INFO L78 Accepts]: Start accepts. Automaton has 94865 states and 110445 transitions. Word has length 250 [2021-12-15 09:05:41,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:41,753 INFO L470 AbstractCegarLoop]: Abstraction has 94865 states and 110445 transitions. [2021-12-15 09:05:41,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 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 09:05:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 94865 states and 110445 transitions. [2021-12-15 09:05:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-15 09:05:41,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:41,785 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:41,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 09:05:41,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:41,988 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:41,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:41,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2131521666, now seen corresponding path program 1 times [2021-12-15 09:05:41,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:41,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336746214] [2021-12-15 09:05:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:41,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:42,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:42,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336746214] [2021-12-15 09:05:42,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336746214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:42,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:42,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:42,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59940799] [2021-12-15 09:05:42,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:42,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:42,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:42,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:42,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:42,261 INFO L87 Difference]: Start difference. First operand 94865 states and 110445 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 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 09:05:43,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:43,202 INFO L93 Difference]: Finished difference Result 198118 states and 232318 transitions. [2021-12-15 09:05:43,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:43,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 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 254 [2021-12-15 09:05:43,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:43,337 INFO L225 Difference]: With dead ends: 198118 [2021-12-15 09:05:43,338 INFO L226 Difference]: Without dead ends: 105291 [2021-12-15 09:05:43,396 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 09:05:43,396 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 151 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:43,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 164 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105291 states. [2021-12-15 09:05:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105291 to 104236. [2021-12-15 09:05:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104236 states, 104235 states have (on average 1.1779632561039959) internal successors, (122785), 104235 states have internal predecessors, (122785), 0 states have call successors, (0), 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 09:05:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104236 states to 104236 states and 122785 transitions. [2021-12-15 09:05:45,359 INFO L78 Accepts]: Start accepts. Automaton has 104236 states and 122785 transitions. Word has length 254 [2021-12-15 09:05:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:45,359 INFO L470 AbstractCegarLoop]: Abstraction has 104236 states and 122785 transitions. [2021-12-15 09:05:45,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 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 09:05:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 104236 states and 122785 transitions. [2021-12-15 09:05:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-15 09:05:45,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:45,394 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:45,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:05:45,394 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:45,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2049986777, now seen corresponding path program 1 times [2021-12-15 09:05:45,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:45,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039696119] [2021-12-15 09:05:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:45,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:05:45,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:45,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039696119] [2021-12-15 09:05:45,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039696119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:45,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:45,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:45,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291294207] [2021-12-15 09:05:45,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:45,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:05:45,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:05:45,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:05:45,467 INFO L87 Difference]: Start difference. First operand 104236 states and 122785 transitions. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:46,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:46,377 INFO L93 Difference]: Finished difference Result 180132 states and 211347 transitions. [2021-12-15 09:05:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:05:46,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-12-15 09:05:46,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:46,464 INFO L225 Difference]: With dead ends: 180132 [2021-12-15 09:05:46,464 INFO L226 Difference]: Without dead ends: 78137 [2021-12-15 09:05:46,518 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 09:05:46,518 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 430 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:46,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 54 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78137 states. [2021-12-15 09:05:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78137 to 77528. [2021-12-15 09:05:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77528 states, 77527 states have (on average 1.1235440556193326) internal successors, (87105), 77527 states have internal predecessors, (87105), 0 states have call successors, (0), 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 09:05:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77528 states to 77528 states and 87105 transitions. [2021-12-15 09:05:47,730 INFO L78 Accepts]: Start accepts. Automaton has 77528 states and 87105 transitions. Word has length 267 [2021-12-15 09:05:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:47,730 INFO L470 AbstractCegarLoop]: Abstraction has 77528 states and 87105 transitions. [2021-12-15 09:05:47,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 77528 states and 87105 transitions. [2021-12-15 09:05:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-12-15 09:05:47,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:47,759 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:47,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 09:05:47,760 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:47,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash 69326496, now seen corresponding path program 1 times [2021-12-15 09:05:47,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:47,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857498593] [2021-12-15 09:05:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:47,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-15 09:05:47,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:47,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857498593] [2021-12-15 09:05:47,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857498593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:47,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618689898] [2021-12-15 09:05:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:47,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:47,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:47,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:47,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:05:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:47,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:47,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 09:05:48,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:48,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618689898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:48,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:48,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:48,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928149478] [2021-12-15 09:05:48,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:48,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:48,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:48,403 INFO L87 Difference]: Start difference. First operand 77528 states and 87105 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 09:05:49,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:49,503 INFO L93 Difference]: Finished difference Result 150374 states and 168716 transitions. [2021-12-15 09:05:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:49,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 287 [2021-12-15 09:05:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:49,597 INFO L225 Difference]: With dead ends: 150374 [2021-12-15 09:05:49,597 INFO L226 Difference]: Without dead ends: 74068 [2021-12-15 09:05:49,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:49,612 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 85 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:49,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 287 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74068 states. [2021-12-15 09:05:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74068 to 69591. [2021-12-15 09:05:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69591 states, 69590 states have (on average 1.1038080183934473) internal successors, (76814), 69590 states have internal predecessors, (76814), 0 states have call successors, (0), 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 09:05:50,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69591 states to 69591 states and 76814 transitions. [2021-12-15 09:05:50,588 INFO L78 Accepts]: Start accepts. Automaton has 69591 states and 76814 transitions. Word has length 287 [2021-12-15 09:05:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:50,589 INFO L470 AbstractCegarLoop]: Abstraction has 69591 states and 76814 transitions. [2021-12-15 09:05:50,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 09:05:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 69591 states and 76814 transitions. [2021-12-15 09:05:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-15 09:05:50,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:50,623 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:50,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 09:05:50,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:50,824 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1510670403, now seen corresponding path program 1 times [2021-12-15 09:05:50,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:50,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680543612] [2021-12-15 09:05:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:50,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 97 proven. 6 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-15 09:05:50,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:50,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680543612] [2021-12-15 09:05:50,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680543612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:50,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121446048] [2021-12-15 09:05:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:50,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:50,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:50,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:50,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:05:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:51,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:51,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-15 09:05:51,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:51,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121446048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:51,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:51,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:51,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243214159] [2021-12-15 09:05:51,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:51,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:51,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:51,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:51,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:51,432 INFO L87 Difference]: Start difference. First operand 69591 states and 76814 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 09:05:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:52,445 INFO L93 Difference]: Finished difference Result 148548 states and 164547 transitions. [2021-12-15 09:05:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:52,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 310 [2021-12-15 09:05:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:52,538 INFO L225 Difference]: With dead ends: 148548 [2021-12-15 09:05:52,538 INFO L226 Difference]: Without dead ends: 79365 [2021-12-15 09:05:52,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:52,554 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 45 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:52,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 367 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79365 states. [2021-12-15 09:05:53,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79365 to 78737. [2021-12-15 09:05:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78737 states, 78736 states have (on average 1.1048059337533023) internal successors, (86988), 78736 states have internal predecessors, (86988), 0 states have call successors, (0), 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 09:05:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78737 states to 78737 states and 86988 transitions. [2021-12-15 09:05:53,602 INFO L78 Accepts]: Start accepts. Automaton has 78737 states and 86988 transitions. Word has length 310 [2021-12-15 09:05:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:53,603 INFO L470 AbstractCegarLoop]: Abstraction has 78737 states and 86988 transitions. [2021-12-15 09:05:53,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 09:05:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 78737 states and 86988 transitions. [2021-12-15 09:05:53,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-15 09:05:53,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:53,648 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:05:53,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:53,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:53,854 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:53,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1855436670, now seen corresponding path program 1 times [2021-12-15 09:05:53,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:53,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139455671] [2021-12-15 09:05:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:53,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:53,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:53,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139455671] [2021-12-15 09:05:53,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139455671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:53,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:53,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:53,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29558819] [2021-12-15 09:05:53,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:53,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:53,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:53,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:53,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:53,981 INFO L87 Difference]: Start difference. First operand 78737 states and 86988 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 09:05:54,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:54,775 INFO L93 Difference]: Finished difference Result 147080 states and 162317 transitions. [2021-12-15 09:05:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:54,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 340 [2021-12-15 09:05:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:54,860 INFO L225 Difference]: With dead ends: 147080 [2021-12-15 09:05:54,860 INFO L226 Difference]: Without dead ends: 69973 [2021-12-15 09:05:55,175 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 09:05:55,176 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 121 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:55,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 303 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:05:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69973 states. [2021-12-15 09:05:55,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69973 to 56155. [2021-12-15 09:05:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56155 states, 56154 states have (on average 1.0809915589272359) internal successors, (60702), 56154 states have internal predecessors, (60702), 0 states have call successors, (0), 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 09:05:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56155 states to 56155 states and 60702 transitions. [2021-12-15 09:05:55,879 INFO L78 Accepts]: Start accepts. Automaton has 56155 states and 60702 transitions. Word has length 340 [2021-12-15 09:05:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:55,879 INFO L470 AbstractCegarLoop]: Abstraction has 56155 states and 60702 transitions. [2021-12-15 09:05:55,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 09:05:55,879 INFO L276 IsEmpty]: Start isEmpty. Operand 56155 states and 60702 transitions. [2021-12-15 09:05:55,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-12-15 09:05:55,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:55,914 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:55,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 09:05:55,915 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:55,915 INFO L85 PathProgramCache]: Analyzing trace with hash 938571243, now seen corresponding path program 1 times [2021-12-15 09:05:55,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:55,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692268041] [2021-12-15 09:05:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:55,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-15 09:05:56,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:56,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692268041] [2021-12-15 09:05:56,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692268041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:56,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:56,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:56,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707278320] [2021-12-15 09:05:56,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:56,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:05:56,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:56,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:05:56,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:05:56,216 INFO L87 Difference]: Start difference. First operand 56155 states and 60702 transitions. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 09:05:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:57,291 INFO L93 Difference]: Finished difference Result 117194 states and 127020 transitions. [2021-12-15 09:05:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:05:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 374 [2021-12-15 09:05:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:57,292 INFO L225 Difference]: With dead ends: 117194 [2021-12-15 09:05:57,292 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 09:05:57,332 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 09:05:57,332 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 407 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:57,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 80 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:05:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 09:05:57,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 09:05:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 09:05:57,333 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 374 [2021-12-15 09:05:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:57,333 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 09:05:57,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 09:05:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 09:05:57,334 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 09:05:57,336 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 09:05:57,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 09:05:57,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.