./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label05.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 db95babf73fb1944c5f5cbb1a7fc98d0691e2dd292f8f012fa0cfbffe032486e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:20:04,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:20:04,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:20:04,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:20:04,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:20:04,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:20:04,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:20:04,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:20:04,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:20:04,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:20:04,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:20:04,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:20:04,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:20:04,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:20:04,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:20:04,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:20:04,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:20:04,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:20:04,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:20:04,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:20:04,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:20:04,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:20:04,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:20:04,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:20:04,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:20:04,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:20:04,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:20:04,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:20:04,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:20:04,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:20:04,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:20:04,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:20:04,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:20:04,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:20:04,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:20:04,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:20:04,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:20:04,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:20:04,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:20:04,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:20:04,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:20:04,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:20:04,188 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:20:04,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:20:04,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:20:04,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:20:04,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:20:04,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:20:04,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:20:04,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:20:04,193 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:20:04,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:20:04,194 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:20:04,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:20:04,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:20:04,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:20:04,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:20:04,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:20:04,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:20:04,196 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:20:04,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:20:04,196 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:20:04,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:20:04,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:20:04,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:20:04,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:20:04,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:20:04,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:20:04,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:20:04,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:20:04,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:20:04,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:20:04,198 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:20:04,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:20:04,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:20:04,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:20:04,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db95babf73fb1944c5f5cbb1a7fc98d0691e2dd292f8f012fa0cfbffe032486e [2021-12-22 09:20:04,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:20:04,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:20:04,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:20:04,449 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:20:04,449 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:20:04,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2021-12-22 09:20:04,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/892ddf09c/f1bed14224fb463186aadfb8375192c5/FLAG47f2117f0 [2021-12-22 09:20:05,139 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:20:05,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2021-12-22 09:20:05,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/892ddf09c/f1bed14224fb463186aadfb8375192c5/FLAG47f2117f0 [2021-12-22 09:20:05,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/892ddf09c/f1bed14224fb463186aadfb8375192c5 [2021-12-22 09:20:05,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:20:05,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:20:05,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:20:05,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:20:05,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:20:05,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:20:05" (1/1) ... [2021-12-22 09:20:05,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@650add84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:05, skipping insertion in model container [2021-12-22 09:20:05,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:20:05" (1/1) ... [2021-12-22 09:20:05,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:20:05,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:20:05,743 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label05.c[6050,6063] [2021-12-22 09:20:06,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:20:06,347 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:20:06,373 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label05.c[6050,6063] [2021-12-22 09:20:06,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:20:06,795 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:20:06,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06 WrapperNode [2021-12-22 09:20:06,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:20:06,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:20:06,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:20:06,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:20:06,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06" (1/1) ... [2021-12-22 09:20:06,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06" (1/1) ... [2021-12-22 09:20:07,256 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-22 09:20:07,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:20:07,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:20:07,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:20:07,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:20:07,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06" (1/1) ... [2021-12-22 09:20:07,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06" (1/1) ... [2021-12-22 09:20:07,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06" (1/1) ... [2021-12-22 09:20:07,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06" (1/1) ... [2021-12-22 09:20:07,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06" (1/1) ... [2021-12-22 09:20:07,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06" (1/1) ... [2021-12-22 09:20:07,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06" (1/1) ... [2021-12-22 09:20:07,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:20:07,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:20:07,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:20:07,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:20:07,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06" (1/1) ... [2021-12-22 09:20:07,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:20:07,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:20:07,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 09:20:08,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 09:20:08,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:20:08,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:20:08,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:20:08,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:20:08,107 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:20:08,121 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:20:11,698 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:20:11,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:20:11,711 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:20:11,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:20:11 BoogieIcfgContainer [2021-12-22 09:20:11,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:20:11,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:20:11,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:20:11,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:20:11,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:20:05" (1/3) ... [2021-12-22 09:20:11,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de4ba7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:20:11, skipping insertion in model container [2021-12-22 09:20:11,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:20:06" (2/3) ... [2021-12-22 09:20:11,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de4ba7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:20:11, skipping insertion in model container [2021-12-22 09:20:11,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:20:11" (3/3) ... [2021-12-22 09:20:11,720 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label05.c [2021-12-22 09:20:11,723 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:20:11,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:20:11,758 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:20:11,762 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 09:20:11,762 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:20:11,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 09:20:11,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:11,789 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] [2021-12-22 09:20:11,790 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:11,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:11,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1824112922, now seen corresponding path program 1 times [2021-12-22 09:20:11,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:11,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207402368] [2021-12-22 09:20:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:11,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:20:11,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:11,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207402368] [2021-12-22 09:20:11,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207402368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:11,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:11,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:20:11,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785270316] [2021-12-22 09:20:11,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:11,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:11,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:12,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:12,018 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:15,635 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2021-12-22 09:20:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:15,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-22 09:20:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:15,661 INFO L225 Difference]: With dead ends: 3082 [2021-12-22 09:20:15,662 INFO L226 Difference]: Without dead ends: 1899 [2021-12-22 09:20:15,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:15,672 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 997 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:15,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 641 Invalid, 3554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-22 09:20:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-12-22 09:20:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2021-12-22 09:20:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2021-12-22 09:20:15,774 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 42 [2021-12-22 09:20:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:15,775 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2021-12-22 09:20:15,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2021-12-22 09:20:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-22 09:20:15,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:15,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:15,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:20:15,780 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:15,782 INFO L85 PathProgramCache]: Analyzing trace with hash -274088414, now seen corresponding path program 1 times [2021-12-22 09:20:15,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:15,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973449549] [2021-12-22 09:20:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:15,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:20:15,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973449549] [2021-12-22 09:20:15,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973449549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:15,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:15,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:20:15,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6285433] [2021-12-22 09:20:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:15,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:15,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:15,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:15,935 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:18,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:18,981 INFO L93 Difference]: Finished difference Result 5384 states and 9441 transitions. [2021-12-22 09:20:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:18,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2021-12-22 09:20:18,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:18,996 INFO L225 Difference]: With dead ends: 5384 [2021-12-22 09:20:18,996 INFO L226 Difference]: Without dead ends: 3492 [2021-12-22 09:20:19,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:19,005 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 922 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:19,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1013 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 09:20:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2021-12-22 09:20:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3491. [2021-12-22 09:20:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 1.5383954154727795) internal successors, (5369), 3490 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5369 transitions. [2021-12-22 09:20:19,091 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5369 transitions. Word has length 107 [2021-12-22 09:20:19,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:19,093 INFO L470 AbstractCegarLoop]: Abstraction has 3491 states and 5369 transitions. [2021-12-22 09:20:19,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5369 transitions. [2021-12-22 09:20:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-22 09:20:19,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:19,100 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:19,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:20:19,102 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1754993373, now seen corresponding path program 1 times [2021-12-22 09:20:19,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:19,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757597834] [2021-12-22 09:20:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:19,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:20:19,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:19,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757597834] [2021-12-22 09:20:19,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757597834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:19,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:19,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:20:19,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299304663] [2021-12-22 09:20:19,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:19,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:19,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:19,216 INFO L87 Difference]: Start difference. First operand 3491 states and 5369 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:22,202 INFO L93 Difference]: Finished difference Result 10169 states and 15700 transitions. [2021-12-22 09:20:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-12-22 09:20:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:22,231 INFO L225 Difference]: With dead ends: 10169 [2021-12-22 09:20:22,231 INFO L226 Difference]: Without dead ends: 6680 [2021-12-22 09:20:22,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:22,239 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 977 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:22,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 847 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 09:20:22,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2021-12-22 09:20:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6669. [2021-12-22 09:20:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6669 states, 6668 states have (on average 1.375224955008998) internal successors, (9170), 6668 states have internal predecessors, (9170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6669 states to 6669 states and 9170 transitions. [2021-12-22 09:20:22,338 INFO L78 Accepts]: Start accepts. Automaton has 6669 states and 9170 transitions. Word has length 109 [2021-12-22 09:20:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:22,339 INFO L470 AbstractCegarLoop]: Abstraction has 6669 states and 9170 transitions. [2021-12-22 09:20:22,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 6669 states and 9170 transitions. [2021-12-22 09:20:22,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-22 09:20:22,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:22,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:22,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:20:22,344 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:22,345 INFO L85 PathProgramCache]: Analyzing trace with hash -569575153, now seen corresponding path program 1 times [2021-12-22 09:20:22,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:22,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621963174] [2021-12-22 09:20:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:22,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:20:22,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:22,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621963174] [2021-12-22 09:20:22,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621963174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:22,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:22,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:20:22,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857639421] [2021-12-22 09:20:22,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:22,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:22,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:22,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:22,486 INFO L87 Difference]: Start difference. First operand 6669 states and 9170 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:24,943 INFO L93 Difference]: Finished difference Result 14123 states and 19185 transitions. [2021-12-22 09:20:24,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:24,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-12-22 09:20:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:24,977 INFO L225 Difference]: With dead ends: 14123 [2021-12-22 09:20:24,977 INFO L226 Difference]: Without dead ends: 7456 [2021-12-22 09:20:24,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:24,991 INFO L933 BasicCegarLoop]: 1086 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:24,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 1215 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:20:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2021-12-22 09:20:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 7456. [2021-12-22 09:20:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7456 states, 7455 states have (on average 1.3362843729040912) internal successors, (9962), 7455 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7456 states to 7456 states and 9962 transitions. [2021-12-22 09:20:25,100 INFO L78 Accepts]: Start accepts. Automaton has 7456 states and 9962 transitions. Word has length 153 [2021-12-22 09:20:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:25,101 INFO L470 AbstractCegarLoop]: Abstraction has 7456 states and 9962 transitions. [2021-12-22 09:20:25,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 7456 states and 9962 transitions. [2021-12-22 09:20:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 09:20:25,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:25,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:25,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:20:25,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -955399323, now seen corresponding path program 1 times [2021-12-22 09:20:25,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:25,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971780527] [2021-12-22 09:20:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:25,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 09:20:25,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:25,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971780527] [2021-12-22 09:20:25,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971780527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:25,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:25,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:20:25,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599483855] [2021-12-22 09:20:25,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:25,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:25,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:25,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:25,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:25,201 INFO L87 Difference]: Start difference. First operand 7456 states and 9962 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:28,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:28,203 INFO L93 Difference]: Finished difference Result 19656 states and 26991 transitions. [2021-12-22 09:20:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:28,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 167 [2021-12-22 09:20:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:28,232 INFO L225 Difference]: With dead ends: 19656 [2021-12-22 09:20:28,236 INFO L226 Difference]: Without dead ends: 12989 [2021-12-22 09:20:28,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:28,242 INFO L933 BasicCegarLoop]: 1071 mSDtfsCounter, 737 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:28,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 1222 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 2526 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 09:20:28,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12989 states. [2021-12-22 09:20:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12989 to 12972. [2021-12-22 09:20:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12972 states, 12971 states have (on average 1.235910878112713) internal successors, (16031), 12971 states have internal predecessors, (16031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12972 states to 12972 states and 16031 transitions. [2021-12-22 09:20:28,431 INFO L78 Accepts]: Start accepts. Automaton has 12972 states and 16031 transitions. Word has length 167 [2021-12-22 09:20:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:28,432 INFO L470 AbstractCegarLoop]: Abstraction has 12972 states and 16031 transitions. [2021-12-22 09:20:28,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 12972 states and 16031 transitions. [2021-12-22 09:20:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-22 09:20:28,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:28,438 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:20:28,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:20:28,438 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1145927935, now seen corresponding path program 1 times [2021-12-22 09:20:28,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160482756] [2021-12-22 09:20:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:28,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-22 09:20:28,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:28,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160482756] [2021-12-22 09:20:28,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160482756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:28,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:28,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:20:28,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505774892] [2021-12-22 09:20:28,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:28,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:28,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:28,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:28,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:28,569 INFO L87 Difference]: Start difference. First operand 12972 states and 16031 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:31,227 INFO L93 Difference]: Finished difference Result 22792 states and 28651 transitions. [2021-12-22 09:20:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:31,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 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 [2021-12-22 09:20:31,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:31,247 INFO L225 Difference]: With dead ends: 22792 [2021-12-22 09:20:31,247 INFO L226 Difference]: Without dead ends: 12980 [2021-12-22 09:20:31,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:31,257 INFO L933 BasicCegarLoop]: 1027 mSDtfsCounter, 728 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:31,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1211 Invalid, 2718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-22 09:20:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12980 states. [2021-12-22 09:20:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12980 to 12972. [2021-12-22 09:20:31,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12972 states, 12971 states have (on average 1.2347544522396114) internal successors, (16016), 12971 states have internal predecessors, (16016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12972 states to 12972 states and 16016 transitions. [2021-12-22 09:20:31,408 INFO L78 Accepts]: Start accepts. Automaton has 12972 states and 16016 transitions. Word has length 254 [2021-12-22 09:20:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:31,409 INFO L470 AbstractCegarLoop]: Abstraction has 12972 states and 16016 transitions. [2021-12-22 09:20:31,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 12972 states and 16016 transitions. [2021-12-22 09:20:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-22 09:20:31,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:31,412 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:31,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:20:31,413 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:31,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:31,414 INFO L85 PathProgramCache]: Analyzing trace with hash -96098949, now seen corresponding path program 1 times [2021-12-22 09:20:31,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:31,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459608715] [2021-12-22 09:20:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:31,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:20:31,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:31,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459608715] [2021-12-22 09:20:31,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459608715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:31,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:31,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:20:31,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120491283] [2021-12-22 09:20:31,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:31,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:31,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:31,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:31,503 INFO L87 Difference]: Start difference. First operand 12972 states and 16016 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) [2021-12-22 09:20:34,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:34,523 INFO L93 Difference]: Finished difference Result 36166 states and 45134 transitions. [2021-12-22 09:20:34,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:34,523 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 256 [2021-12-22 09:20:34,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:34,562 INFO L225 Difference]: With dead ends: 36166 [2021-12-22 09:20:34,562 INFO L226 Difference]: Without dead ends: 23196 [2021-12-22 09:20:34,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:34,578 INFO L933 BasicCegarLoop]: 1851 mSDtfsCounter, 842 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:34,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 1988 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-22 09:20:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23196 states. [2021-12-22 09:20:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23196 to 23191. [2021-12-22 09:20:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23191 states, 23190 states have (on average 1.1870202673566193) internal successors, (27527), 23190 states have internal predecessors, (27527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23191 states to 23191 states and 27527 transitions. [2021-12-22 09:20:34,861 INFO L78 Accepts]: Start accepts. Automaton has 23191 states and 27527 transitions. Word has length 256 [2021-12-22 09:20:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:34,861 INFO L470 AbstractCegarLoop]: Abstraction has 23191 states and 27527 transitions. [2021-12-22 09:20:34,862 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) [2021-12-22 09:20:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 23191 states and 27527 transitions. [2021-12-22 09:20:34,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-12-22 09:20:34,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:34,865 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:34,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:20:34,865 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:34,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1667206858, now seen corresponding path program 1 times [2021-12-22 09:20:34,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:34,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708504155] [2021-12-22 09:20:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:34,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 09:20:34,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:34,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708504155] [2021-12-22 09:20:34,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708504155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:34,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:34,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:20:34,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785597131] [2021-12-22 09:20:34,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:34,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:34,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:34,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:34,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:34,945 INFO L87 Difference]: Start difference. First operand 23191 states and 27527 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:38,057 INFO L93 Difference]: Finished difference Result 56620 states and 68544 transitions. [2021-12-22 09:20:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:38,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 278 [2021-12-22 09:20:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:38,106 INFO L225 Difference]: With dead ends: 56620 [2021-12-22 09:20:38,106 INFO L226 Difference]: Without dead ends: 34218 [2021-12-22 09:20:38,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:38,127 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 884 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:38,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 926 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 09:20:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34218 states. [2021-12-22 09:20:38,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34218 to 33422. [2021-12-22 09:20:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33422 states, 33421 states have (on average 1.1724664133329343) internal successors, (39185), 33421 states have internal predecessors, (39185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33422 states to 33422 states and 39185 transitions. [2021-12-22 09:20:38,491 INFO L78 Accepts]: Start accepts. Automaton has 33422 states and 39185 transitions. Word has length 278 [2021-12-22 09:20:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:38,492 INFO L470 AbstractCegarLoop]: Abstraction has 33422 states and 39185 transitions. [2021-12-22 09:20:38,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 33422 states and 39185 transitions. [2021-12-22 09:20:38,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-22 09:20:38,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:38,495 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:20:38,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:20:38,496 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:38,496 INFO L85 PathProgramCache]: Analyzing trace with hash 387334697, now seen corresponding path program 1 times [2021-12-22 09:20:38,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:38,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157638711] [2021-12-22 09:20:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:38,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 79 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:20:38,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:38,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157638711] [2021-12-22 09:20:38,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157638711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:20:38,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449382759] [2021-12-22 09:20:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:38,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:20:38,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:20:38,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:20:38,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:20:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:38,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:20:38,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:20:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-22 09:20:39,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:20:39,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449382759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:39,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:20:39,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-22 09:20:39,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526634660] [2021-12-22 09:20:39,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:39,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:39,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:39,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:39,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:20:39,231 INFO L87 Difference]: Start difference. First operand 33422 states and 39185 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:42,008 INFO L93 Difference]: Finished difference Result 66053 states and 77575 transitions. [2021-12-22 09:20:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:42,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 283 [2021-12-22 09:20:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:42,040 INFO L225 Difference]: With dead ends: 66053 [2021-12-22 09:20:42,041 INFO L226 Difference]: Without dead ends: 33420 [2021-12-22 09:20:42,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:20:42,058 INFO L933 BasicCegarLoop]: 1359 mSDtfsCounter, 1165 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2470 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:42,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 1441 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2470 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:20:42,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33420 states. [2021-12-22 09:20:42,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33420 to 33419. [2021-12-22 09:20:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33419 states, 33418 states have (on average 1.1338500209467952) internal successors, (37891), 33418 states have internal predecessors, (37891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33419 states to 33419 states and 37891 transitions. [2021-12-22 09:20:42,376 INFO L78 Accepts]: Start accepts. Automaton has 33419 states and 37891 transitions. Word has length 283 [2021-12-22 09:20:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:42,377 INFO L470 AbstractCegarLoop]: Abstraction has 33419 states and 37891 transitions. [2021-12-22 09:20:42,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 33419 states and 37891 transitions. [2021-12-22 09:20:42,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-12-22 09:20:42,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:42,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:20:42,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:20:42,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:20:42,599 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:42,599 INFO L85 PathProgramCache]: Analyzing trace with hash -77460058, now seen corresponding path program 1 times [2021-12-22 09:20:42,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:42,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826936039] [2021-12-22 09:20:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:42,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-22 09:20:42,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:42,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826936039] [2021-12-22 09:20:42,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826936039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:42,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:42,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:20:42,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279713981] [2021-12-22 09:20:42,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:42,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:42,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:42,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:42,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:42,696 INFO L87 Difference]: Start difference. First operand 33419 states and 37891 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:45,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:45,865 INFO L93 Difference]: Finished difference Result 77862 states and 89421 transitions. [2021-12-22 09:20:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:45,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 333 [2021-12-22 09:20:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:46,012 INFO L225 Difference]: With dead ends: 77862 [2021-12-22 09:20:46,012 INFO L226 Difference]: Without dead ends: 45232 [2021-12-22 09:20:46,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:46,022 INFO L933 BasicCegarLoop]: 1802 mSDtfsCounter, 821 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2548 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 3270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 2548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:46,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 1945 Invalid, 3270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [722 Valid, 2548 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 09:20:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45232 states. [2021-12-22 09:20:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45232 to 44441. [2021-12-22 09:20:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44441 states, 44440 states have (on average 1.116021602160216) internal successors, (49596), 44440 states have internal predecessors, (49596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44441 states to 44441 states and 49596 transitions. [2021-12-22 09:20:46,391 INFO L78 Accepts]: Start accepts. Automaton has 44441 states and 49596 transitions. Word has length 333 [2021-12-22 09:20:46,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:46,392 INFO L470 AbstractCegarLoop]: Abstraction has 44441 states and 49596 transitions. [2021-12-22 09:20:46,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 44441 states and 49596 transitions. [2021-12-22 09:20:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-22 09:20:46,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:46,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:46,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:20:46,396 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:46,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:46,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1657907469, now seen corresponding path program 1 times [2021-12-22 09:20:46,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:46,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755318689] [2021-12-22 09:20:46,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:46,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 208 proven. 113 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 09:20:46,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755318689] [2021-12-22 09:20:46,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755318689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:20:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723875306] [2021-12-22 09:20:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:46,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:20:46,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:20:46,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:20:46,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:20:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:46,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:20:46,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:20:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-22 09:20:47,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:20:47,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723875306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:47,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:20:47,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-22 09:20:47,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171470458] [2021-12-22 09:20:47,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:47,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:47,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:47,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:20:47,166 INFO L87 Difference]: Start difference. First operand 44441 states and 49596 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:49,966 INFO L93 Difference]: Finished difference Result 88084 states and 98390 transitions. [2021-12-22 09:20:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:49,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 348 [2021-12-22 09:20:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:50,013 INFO L225 Difference]: With dead ends: 88084 [2021-12-22 09:20:50,013 INFO L226 Difference]: Without dead ends: 44432 [2021-12-22 09:20:50,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:20:50,030 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 1072 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:50,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 815 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-22 09:20:50,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44432 states. [2021-12-22 09:20:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44432 to 44431. [2021-12-22 09:20:50,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44431 states, 44430 states have (on average 1.0851901868107134) internal successors, (48215), 44430 states have internal predecessors, (48215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44431 states to 44431 states and 48215 transitions. [2021-12-22 09:20:50,424 INFO L78 Accepts]: Start accepts. Automaton has 44431 states and 48215 transitions. Word has length 348 [2021-12-22 09:20:50,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:50,424 INFO L470 AbstractCegarLoop]: Abstraction has 44431 states and 48215 transitions. [2021-12-22 09:20:50,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 44431 states and 48215 transitions. [2021-12-22 09:20:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-12-22 09:20:50,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:50,429 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-22 09:20:50,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:20:50,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 09:20:50,644 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:50,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:50,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1478414346, now seen corresponding path program 1 times [2021-12-22 09:20:50,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:50,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68492140] [2021-12-22 09:20:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:50,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-22 09:20:50,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:50,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68492140] [2021-12-22 09:20:50,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68492140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:50,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:50,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:20:50,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665011873] [2021-12-22 09:20:50,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:50,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:50,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:50,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:50,762 INFO L87 Difference]: Start difference. First operand 44431 states and 48215 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:54,046 INFO L93 Difference]: Finished difference Result 89662 states and 98208 transitions. [2021-12-22 09:20:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:54,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 371 [2021-12-22 09:20:54,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:54,111 INFO L225 Difference]: With dead ends: 89662 [2021-12-22 09:20:54,111 INFO L226 Difference]: Without dead ends: 53111 [2021-12-22 09:20:54,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:54,130 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 951 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2875 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 3406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 2875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:54,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 665 Invalid, 3406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 2875 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 09:20:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53111 states. [2021-12-22 09:20:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53111 to 44431. [2021-12-22 09:20:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44431 states, 44430 states have (on average 1.0851901868107134) internal successors, (48215), 44430 states have internal predecessors, (48215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44431 states to 44431 states and 48215 transitions. [2021-12-22 09:20:54,580 INFO L78 Accepts]: Start accepts. Automaton has 44431 states and 48215 transitions. Word has length 371 [2021-12-22 09:20:54,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:54,581 INFO L470 AbstractCegarLoop]: Abstraction has 44431 states and 48215 transitions. [2021-12-22 09:20:54,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:54,581 INFO L276 IsEmpty]: Start isEmpty. Operand 44431 states and 48215 transitions. [2021-12-22 09:20:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-12-22 09:20:54,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:54,587 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:54,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:20:54,587 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:54,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1603333441, now seen corresponding path program 1 times [2021-12-22 09:20:54,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:54,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479457121] [2021-12-22 09:20:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:54,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-22 09:20:54,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479457121] [2021-12-22 09:20:54,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479457121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:54,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:54,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:20:54,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323537426] [2021-12-22 09:20:54,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:54,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:54,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:54,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:54,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:54,675 INFO L87 Difference]: Start difference. First operand 44431 states and 48215 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:57,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:20:57,671 INFO L93 Difference]: Finished difference Result 99886 states and 109265 transitions. [2021-12-22 09:20:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:20:57,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 398 [2021-12-22 09:20:57,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:20:57,738 INFO L225 Difference]: With dead ends: 99886 [2021-12-22 09:20:57,738 INFO L226 Difference]: Without dead ends: 56244 [2021-12-22 09:20:57,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:57,769 INFO L933 BasicCegarLoop]: 673 mSDtfsCounter, 927 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 3373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:20:57,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 754 Invalid, 3373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [993 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:20:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56244 states. [2021-12-22 09:20:58,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56244 to 54657. [2021-12-22 09:20:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54657 states, 54656 states have (on average 1.0905298594847774) internal successors, (59604), 54656 states have internal predecessors, (59604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54657 states to 54657 states and 59604 transitions. [2021-12-22 09:20:58,396 INFO L78 Accepts]: Start accepts. Automaton has 54657 states and 59604 transitions. Word has length 398 [2021-12-22 09:20:58,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:20:58,397 INFO L470 AbstractCegarLoop]: Abstraction has 54657 states and 59604 transitions. [2021-12-22 09:20:58,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:20:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 54657 states and 59604 transitions. [2021-12-22 09:20:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2021-12-22 09:20:58,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:20:58,404 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:20:58,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:20:58,404 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:20:58,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:20:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash -539611326, now seen corresponding path program 1 times [2021-12-22 09:20:58,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:20:58,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65338942] [2021-12-22 09:20:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:20:58,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:20:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:20:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-12-22 09:20:58,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:20:58,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65338942] [2021-12-22 09:20:58,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65338942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:20:58,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:20:58,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:20:58,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268118556] [2021-12-22 09:20:58,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:20:58,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:20:58,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:20:58,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:20:58,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:20:58,526 INFO L87 Difference]: Start difference. First operand 54657 states and 59604 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:21:01,357 INFO L93 Difference]: Finished difference Result 110102 states and 120006 transitions. [2021-12-22 09:21:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:21:01,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 431 [2021-12-22 09:21:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:21:01,423 INFO L225 Difference]: With dead ends: 110102 [2021-12-22 09:21:01,423 INFO L226 Difference]: Without dead ends: 56234 [2021-12-22 09:21:01,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:21:01,455 INFO L933 BasicCegarLoop]: 1421 mSDtfsCounter, 996 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 3082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:21:01,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 1509 Invalid, 3082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-22 09:21:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56234 states. [2021-12-22 09:21:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56234 to 54649. [2021-12-22 09:21:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54649 states, 54648 states have (on average 1.0689686722295417) internal successors, (58417), 54648 states have internal predecessors, (58417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54649 states to 54649 states and 58417 transitions. [2021-12-22 09:21:02,168 INFO L78 Accepts]: Start accepts. Automaton has 54649 states and 58417 transitions. Word has length 431 [2021-12-22 09:21:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:21:02,169 INFO L470 AbstractCegarLoop]: Abstraction has 54649 states and 58417 transitions. [2021-12-22 09:21:02,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:21:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 54649 states and 58417 transitions. [2021-12-22 09:21:02,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-12-22 09:21:02,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:21:02,179 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:21:02,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 09:21:02,179 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:21:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:21:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash 288168480, now seen corresponding path program 1 times [2021-12-22 09:21:02,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:21:02,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627500441] [2021-12-22 09:21:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:21:02,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:21:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:21:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-22 09:21:02,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:21:02,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627500441] [2021-12-22 09:21:02,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627500441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:21:02,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:21:02,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:21:02,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369920764] [2021-12-22 09:21:02,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:21:02,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:21:02,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:21:02,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:21:02,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:21:02,297 INFO L87 Difference]: Start difference. First operand 54649 states and 58417 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)