./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label32.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 da6307e18962eea94383e9cef9de875e55374f6b4142b055a170057bc7246c1d --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:44:15,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:44:15,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:44:15,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:44:15,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:44:15,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:44:15,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:44:15,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:44:15,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:44:15,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:44:15,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:44:15,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:44:15,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:44:15,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:44:15,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:44:15,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:44:15,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:44:15,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:44:15,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:44:15,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:44:15,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:44:15,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:44:15,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:44:15,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:44:15,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:44:15,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:44:15,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:44:15,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:44:15,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:44:15,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:44:15,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:44:15,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:44:15,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:44:15,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:44:15,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:44:15,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:44:15,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:44:15,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:44:15,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:44:15,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:44:15,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:44:15,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:44:15,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:44:15,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:44:15,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:44:15,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:44:15,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:44:15,177 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:44:15,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:44:15,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:44:15,178 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:44:15,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:44:15,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:44:15,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:44:15,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:44:15,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:44:15,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:44:15,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:44:15,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:44:15,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:44:15,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:44:15,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:44:15,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:44:15,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:44:15,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:44:15,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:44:15,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:44:15,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:44:15,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:44:15,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:44:15,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:44:15,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:44:15,182 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:44:15,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:44:15,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:44:15,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:44:15,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da6307e18962eea94383e9cef9de875e55374f6b4142b055a170057bc7246c1d [2021-12-15 09:44:15,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:44:15,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:44:15,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:44:15,376 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:44:15,376 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:44:15,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label32.c [2021-12-15 09:44:15,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aade7927/fae249e2fcf446458f9e84d811f0c51d/FLAG8df12c116 [2021-12-15 09:44:16,009 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:44:16,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label32.c [2021-12-15 09:44:16,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aade7927/fae249e2fcf446458f9e84d811f0c51d/FLAG8df12c116 [2021-12-15 09:44:16,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aade7927/fae249e2fcf446458f9e84d811f0c51d [2021-12-15 09:44:16,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:44:16,198 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:44:16,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:44:16,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:44:16,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:44:16,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:44:16" (1/1) ... [2021-12-15 09:44:16,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ffbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:16, skipping insertion in model container [2021-12-15 09:44:16,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:44:16" (1/1) ... [2021-12-15 09:44:16,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:44:16,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:44:16,469 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_label32.c[1533,1546] [2021-12-15 09:44:17,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:44:17,050 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:44:17,067 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_label32.c[1533,1546] [2021-12-15 09:44:17,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:44:17,422 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:44:17,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17 WrapperNode [2021-12-15 09:44:17,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:44:17,424 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:44:17,424 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:44:17,424 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:44:17,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17" (1/1) ... [2021-12-15 09:44:17,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17" (1/1) ... [2021-12-15 09:44:17,925 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 09:44:17,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:44:17,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:44:17,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:44:17,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:44:17,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17" (1/1) ... [2021-12-15 09:44:17,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17" (1/1) ... [2021-12-15 09:44:17,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17" (1/1) ... [2021-12-15 09:44:18,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17" (1/1) ... [2021-12-15 09:44:18,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17" (1/1) ... [2021-12-15 09:44:18,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17" (1/1) ... [2021-12-15 09:44:18,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17" (1/1) ... [2021-12-15 09:44:18,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:44:18,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:44:18,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:44:18,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:44:18,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17" (1/1) ... [2021-12-15 09:44:18,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:44:18,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:44:18,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:44:18,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:44:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:44:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:44:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:44:18,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:44:18,493 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:44:18,494 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:44:22,001 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:44:22,017 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:44:22,017 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:44:22,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:44:22 BoogieIcfgContainer [2021-12-15 09:44:22,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:44:22,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:44:22,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:44:22,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:44:22,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:44:16" (1/3) ... [2021-12-15 09:44:22,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebabfb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:44:22, skipping insertion in model container [2021-12-15 09:44:22,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:17" (2/3) ... [2021-12-15 09:44:22,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebabfb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:44:22, skipping insertion in model container [2021-12-15 09:44:22,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:44:22" (3/3) ... [2021-12-15 09:44:22,026 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label32.c [2021-12-15 09:44:22,029 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:44:22,029 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:44:22,067 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:44:22,071 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:44:22,071 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:44:22,096 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) [2021-12-15 09:44:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 09:44:22,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:22,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:22,108 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:22,112 INFO L85 PathProgramCache]: Analyzing trace with hash 297966002, now seen corresponding path program 1 times [2021-12-15 09:44:22,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:22,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48014476] [2021-12-15 09:44:22,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:22,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:22,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:22,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48014476] [2021-12-15 09:44:22,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48014476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:22,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:22,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:22,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703329351] [2021-12-15 09:44:22,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:22,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:22,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:22,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:22,286 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:25,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:25,637 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-12-15 09:44:25,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:25,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-15 09:44:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:25,662 INFO L225 Difference]: With dead ends: 3035 [2021-12-15 09:44:25,664 INFO L226 Difference]: Without dead ends: 1873 [2021-12-15 09:44:25,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:25,677 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 897 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:25,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 09:44:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-12-15 09:44:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-12-15 09:44:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-12-15 09:44:25,771 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 8 [2021-12-15 09:44:25,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:25,771 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-12-15 09:44:25,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-12-15 09:44:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-15 09:44:25,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:25,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:25,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:44:25,775 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:25,776 INFO L85 PathProgramCache]: Analyzing trace with hash -161890243, now seen corresponding path program 1 times [2021-12-15 09:44:25,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:25,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987044918] [2021-12-15 09:44:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:25,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:25,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:25,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987044918] [2021-12-15 09:44:25,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987044918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:25,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:25,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:25,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890153540] [2021-12-15 09:44:25,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:25,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:25,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:25,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:25,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:25,915 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:29,605 INFO L93 Difference]: Finished difference Result 5407 states and 8405 transitions. [2021-12-15 09:44:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:29,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-15 09:44:29,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:29,618 INFO L225 Difference]: With dead ends: 5407 [2021-12-15 09:44:29,618 INFO L226 Difference]: Without dead ends: 3550 [2021-12-15 09:44:29,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:29,626 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 864 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 3344 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 3785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 3344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:29,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 1041 Invalid, 3785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 3344 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-15 09:44:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-12-15 09:44:29,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3476. [2021-12-15 09:44:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3476 states, 3475 states have (on average 1.4900719424460431) internal successors, (5178), 3475 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3476 states to 3476 states and 5178 transitions. [2021-12-15 09:44:29,688 INFO L78 Accepts]: Start accepts. Automaton has 3476 states and 5178 transitions. Word has length 80 [2021-12-15 09:44:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:29,690 INFO L470 AbstractCegarLoop]: Abstraction has 3476 states and 5178 transitions. [2021-12-15 09:44:29,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3476 states and 5178 transitions. [2021-12-15 09:44:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-15 09:44:29,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:29,694 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:44:29,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:44:29,696 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1603725300, now seen corresponding path program 1 times [2021-12-15 09:44:29,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:29,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584418204] [2021-12-15 09:44:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:29,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:29,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:29,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584418204] [2021-12-15 09:44:29,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584418204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:29,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:29,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:29,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891790690] [2021-12-15 09:44:29,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:29,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:29,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:29,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:29,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:29,758 INFO L87 Difference]: Start difference. First operand 3476 states and 5178 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:32,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:32,669 INFO L93 Difference]: Finished difference Result 10140 states and 15131 transitions. [2021-12-15 09:44:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:32,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-12-15 09:44:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:32,690 INFO L225 Difference]: With dead ends: 10140 [2021-12-15 09:44:32,690 INFO L226 Difference]: Without dead ends: 6666 [2021-12-15 09:44:32,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:32,697 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 962 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 776 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:32,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 849 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [776 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:44:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6666 states. [2021-12-15 09:44:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6666 to 6659. [2021-12-15 09:44:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6659 states, 6658 states have (on average 1.364674076299189) internal successors, (9086), 6658 states have internal predecessors, (9086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6659 states to 6659 states and 9086 transitions. [2021-12-15 09:44:32,845 INFO L78 Accepts]: Start accepts. Automaton has 6659 states and 9086 transitions. Word has length 94 [2021-12-15 09:44:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:32,846 INFO L470 AbstractCegarLoop]: Abstraction has 6659 states and 9086 transitions. [2021-12-15 09:44:32,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 6659 states and 9086 transitions. [2021-12-15 09:44:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 09:44:32,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:32,847 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:44:32,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:44:32,847 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:32,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1531855582, now seen corresponding path program 1 times [2021-12-15 09:44:32,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:32,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412588025] [2021-12-15 09:44:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:32,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:32,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:32,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412588025] [2021-12-15 09:44:32,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412588025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:32,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:32,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:32,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652456033] [2021-12-15 09:44:32,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:32,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:32,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:32,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:32,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:32,943 INFO L87 Difference]: Start difference. First operand 6659 states and 9086 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:35,759 INFO L93 Difference]: Finished difference Result 16505 states and 23205 transitions. [2021-12-15 09:44:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:35,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-15 09:44:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:35,800 INFO L225 Difference]: With dead ends: 16505 [2021-12-15 09:44:35,801 INFO L226 Difference]: Without dead ends: 9848 [2021-12-15 09:44:35,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:35,819 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 1016 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:35,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 907 Invalid, 3382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:44:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-12-15 09:44:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9836. [2021-12-15 09:44:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9836 states, 9835 states have (on average 1.3707168276563295) internal successors, (13481), 9835 states have internal predecessors, (13481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9836 states to 9836 states and 13481 transitions. [2021-12-15 09:44:35,960 INFO L78 Accepts]: Start accepts. Automaton has 9836 states and 13481 transitions. Word has length 97 [2021-12-15 09:44:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:35,961 INFO L470 AbstractCegarLoop]: Abstraction has 9836 states and 13481 transitions. [2021-12-15 09:44:35,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:35,961 INFO L276 IsEmpty]: Start isEmpty. Operand 9836 states and 13481 transitions. [2021-12-15 09:44:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-15 09:44:35,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:35,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:35,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:44:35,969 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:35,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1122730794, now seen corresponding path program 1 times [2021-12-15 09:44:35,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:35,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163338614] [2021-12-15 09:44:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:35,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:36,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:36,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163338614] [2021-12-15 09:44:36,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163338614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:36,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:36,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:44:36,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750893550] [2021-12-15 09:44:36,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:36,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 09:44:36,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:36,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 09:44:36,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:44:36,176 INFO L87 Difference]: Start difference. First operand 9836 states and 13481 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:39,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:39,701 INFO L93 Difference]: Finished difference Result 20498 states and 27853 transitions. [2021-12-15 09:44:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:44:39,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-15 09:44:39,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:39,724 INFO L225 Difference]: With dead ends: 20498 [2021-12-15 09:44:39,724 INFO L226 Difference]: Without dead ends: 10664 [2021-12-15 09:44:39,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:44:39,734 INFO L933 BasicCegarLoop]: 1094 mSDtfsCounter, 2251 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 4600 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 4832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 4600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:39,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 2643 Invalid, 4832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 4600 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-15 09:44:39,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10664 states. [2021-12-15 09:44:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10664 to 10623. [2021-12-15 09:44:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10623 states, 10622 states have (on average 1.3437205799284504) internal successors, (14273), 10622 states have internal predecessors, (14273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10623 states to 10623 states and 14273 transitions. [2021-12-15 09:44:39,880 INFO L78 Accepts]: Start accepts. Automaton has 10623 states and 14273 transitions. Word has length 113 [2021-12-15 09:44:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:39,881 INFO L470 AbstractCegarLoop]: Abstraction has 10623 states and 14273 transitions. [2021-12-15 09:44:39,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 10623 states and 14273 transitions. [2021-12-15 09:44:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-15 09:44:39,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:39,887 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:39,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:44:39,888 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:39,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:39,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1877849666, now seen corresponding path program 1 times [2021-12-15 09:44:39,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:39,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932880710] [2021-12-15 09:44:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:39,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-15 09:44:39,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:39,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932880710] [2021-12-15 09:44:39,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932880710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:39,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:39,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:39,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744986887] [2021-12-15 09:44:39,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:39,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:39,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:39,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:39,982 INFO L87 Difference]: Start difference. First operand 10623 states and 14273 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:42,670 INFO L93 Difference]: Finished difference Result 29899 states and 40709 transitions. [2021-12-15 09:44:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:42,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 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 176 [2021-12-15 09:44:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:42,703 INFO L225 Difference]: With dead ends: 29899 [2021-12-15 09:44:42,703 INFO L226 Difference]: Without dead ends: 20065 [2021-12-15 09:44:42,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:42,716 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 887 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:42,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 998 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [874 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:44:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20065 states. [2021-12-15 09:44:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20065 to 19274. [2021-12-15 09:44:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19274 states, 19273 states have (on average 1.240803196181186) internal successors, (23914), 19273 states have internal predecessors, (23914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19274 states to 19274 states and 23914 transitions. [2021-12-15 09:44:42,943 INFO L78 Accepts]: Start accepts. Automaton has 19274 states and 23914 transitions. Word has length 176 [2021-12-15 09:44:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:42,943 INFO L470 AbstractCegarLoop]: Abstraction has 19274 states and 23914 transitions. [2021-12-15 09:44:42,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 19274 states and 23914 transitions. [2021-12-15 09:44:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-15 09:44:42,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:42,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:42,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:44:42,946 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:42,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:42,947 INFO L85 PathProgramCache]: Analyzing trace with hash -785918150, now seen corresponding path program 1 times [2021-12-15 09:44:42,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:42,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919113460] [2021-12-15 09:44:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:42,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:43,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:43,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919113460] [2021-12-15 09:44:43,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919113460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:43,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:43,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:43,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9193842] [2021-12-15 09:44:43,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:43,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:43,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:43,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:43,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:43,020 INFO L87 Difference]: Start difference. First operand 19274 states and 23914 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:45,700 INFO L93 Difference]: Finished difference Result 44068 states and 54905 transitions. [2021-12-15 09:44:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:45,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-12-15 09:44:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:45,742 INFO L225 Difference]: With dead ends: 44068 [2021-12-15 09:44:45,743 INFO L226 Difference]: Without dead ends: 25583 [2021-12-15 09:44:45,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:45,759 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 858 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:45,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 956 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:44:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25583 states. [2021-12-15 09:44:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25583 to 24786. [2021-12-15 09:44:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24786 states, 24785 states have (on average 1.2304216259834577) internal successors, (30496), 24785 states have internal predecessors, (30496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24786 states to 24786 states and 30496 transitions. [2021-12-15 09:44:46,026 INFO L78 Accepts]: Start accepts. Automaton has 24786 states and 30496 transitions. Word has length 207 [2021-12-15 09:44:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:46,027 INFO L470 AbstractCegarLoop]: Abstraction has 24786 states and 30496 transitions. [2021-12-15 09:44:46,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 24786 states and 30496 transitions. [2021-12-15 09:44:46,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-15 09:44:46,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:46,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:46,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:44:46,030 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:46,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:46,031 INFO L85 PathProgramCache]: Analyzing trace with hash 224290900, now seen corresponding path program 1 times [2021-12-15 09:44:46,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:46,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269863366] [2021-12-15 09:44:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:46,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:46,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:46,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269863366] [2021-12-15 09:44:46,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269863366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:46,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:46,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:46,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446056520] [2021-12-15 09:44:46,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:46,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:44:46,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:46,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:44:46,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:46,151 INFO L87 Difference]: Start difference. First operand 24786 states and 30496 transitions. Second operand has 4 states, 4 states have (on average 67.5) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:50,001 INFO L93 Difference]: Finished difference Result 49586 states and 61030 transitions. [2021-12-15 09:44:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:44:50,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 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 270 [2021-12-15 09:44:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:50,035 INFO L225 Difference]: With dead ends: 49586 [2021-12-15 09:44:50,035 INFO L226 Difference]: Without dead ends: 25589 [2021-12-15 09:44:50,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:50,051 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 1449 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 4871 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 5408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 4871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:50,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1449 Valid, 1033 Invalid, 5408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 4871 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-15 09:44:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25589 states. [2021-12-15 09:44:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25589 to 25573. [2021-12-15 09:44:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25573 states, 25572 states have (on average 1.2109729391521977) internal successors, (30967), 25572 states have internal predecessors, (30967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25573 states to 25573 states and 30967 transitions. [2021-12-15 09:44:50,331 INFO L78 Accepts]: Start accepts. Automaton has 25573 states and 30967 transitions. Word has length 270 [2021-12-15 09:44:50,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:50,331 INFO L470 AbstractCegarLoop]: Abstraction has 25573 states and 30967 transitions. [2021-12-15 09:44:50,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 25573 states and 30967 transitions. [2021-12-15 09:44:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-12-15 09:44:50,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:50,336 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:50,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:44:50,338 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:50,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1575495504, now seen corresponding path program 1 times [2021-12-15 09:44:50,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:50,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346616286] [2021-12-15 09:44:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:50,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 09:44:50,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:50,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346616286] [2021-12-15 09:44:50,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346616286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:50,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:50,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:50,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159200405] [2021-12-15 09:44:50,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:50,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:50,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:50,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:50,426 INFO L87 Difference]: Start difference. First operand 25573 states and 30967 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:53,385 INFO L93 Difference]: Finished difference Result 56658 states and 69695 transitions. [2021-12-15 09:44:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 296 [2021-12-15 09:44:53,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:53,423 INFO L225 Difference]: With dead ends: 56658 [2021-12-15 09:44:53,423 INFO L226 Difference]: Without dead ends: 31874 [2021-12-15 09:44:53,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:53,442 INFO L933 BasicCegarLoop]: 1770 mSDtfsCounter, 868 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 3250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:53,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 1923 Invalid, 3250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:44:53,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31874 states. [2021-12-15 09:44:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31874 to 31868. [2021-12-15 09:44:53,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31868 states, 31867 states have (on average 1.1874038974487715) internal successors, (37839), 31867 states have internal predecessors, (37839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31868 states to 31868 states and 37839 transitions. [2021-12-15 09:44:53,866 INFO L78 Accepts]: Start accepts. Automaton has 31868 states and 37839 transitions. Word has length 296 [2021-12-15 09:44:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:53,866 INFO L470 AbstractCegarLoop]: Abstraction has 31868 states and 37839 transitions. [2021-12-15 09:44:53,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 31868 states and 37839 transitions. [2021-12-15 09:44:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-15 09:44:53,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:53,870 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:53,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:44:53,870 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:53,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:53,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1180262595, now seen corresponding path program 1 times [2021-12-15 09:44:53,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:53,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847286109] [2021-12-15 09:44:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:53,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 09:44:53,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:53,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847286109] [2021-12-15 09:44:53,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847286109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:53,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:53,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:53,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233562431] [2021-12-15 09:44:53,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:53,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:53,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:53,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:53,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:53,966 INFO L87 Difference]: Start difference. First operand 31868 states and 37839 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) [2021-12-15 09:44:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:56,482 INFO L93 Difference]: Finished difference Result 62945 states and 74883 transitions. [2021-12-15 09:44:56,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:56,483 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 324 [2021-12-15 09:44:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:56,515 INFO L225 Difference]: With dead ends: 62945 [2021-12-15 09:44:56,515 INFO L226 Difference]: Without dead ends: 31866 [2021-12-15 09:44:56,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:56,536 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 1207 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:56,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 1456 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:44:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31866 states. [2021-12-15 09:44:56,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31866 to 31865. [2021-12-15 09:44:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31865 states, 31864 states have (on average 1.1478157167963847) internal successors, (36574), 31864 states have internal predecessors, (36574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31865 states to 31865 states and 36574 transitions. [2021-12-15 09:44:56,804 INFO L78 Accepts]: Start accepts. Automaton has 31865 states and 36574 transitions. Word has length 324 [2021-12-15 09:44:56,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:56,804 INFO L470 AbstractCegarLoop]: Abstraction has 31865 states and 36574 transitions. [2021-12-15 09:44:56,804 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) [2021-12-15 09:44:56,805 INFO L276 IsEmpty]: Start isEmpty. Operand 31865 states and 36574 transitions. [2021-12-15 09:44:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-12-15 09:44:56,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:56,811 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:56,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:44:56,812 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:56,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1345651346, now seen corresponding path program 1 times [2021-12-15 09:44:56,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:56,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959975562] [2021-12-15 09:44:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:56,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 09:44:56,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:56,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959975562] [2021-12-15 09:44:56,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959975562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:56,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:56,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:56,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338277968] [2021-12-15 09:44:56,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:56,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:56,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:56,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:56,926 INFO L87 Difference]: Start difference. First operand 31865 states and 36574 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:59,967 INFO L93 Difference]: Finished difference Result 93624 states and 107627 transitions. [2021-12-15 09:44:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:59,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 401 [2021-12-15 09:44:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:00,033 INFO L225 Difference]: With dead ends: 93624 [2021-12-15 09:45:00,034 INFO L226 Difference]: Without dead ends: 56239 [2021-12-15 09:45:00,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:00,059 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 1001 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 810 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 3221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 810 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:00,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 1818 Invalid, 3221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [810 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:45:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56239 states. [2021-12-15 09:45:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56239 to 56234. [2021-12-15 09:45:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56234 states, 56233 states have (on average 1.1218501591592125) internal successors, (63085), 56233 states have internal predecessors, (63085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56234 states to 56234 states and 63085 transitions. [2021-12-15 09:45:00,563 INFO L78 Accepts]: Start accepts. Automaton has 56234 states and 63085 transitions. Word has length 401 [2021-12-15 09:45:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:00,563 INFO L470 AbstractCegarLoop]: Abstraction has 56234 states and 63085 transitions. [2021-12-15 09:45:00,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 56234 states and 63085 transitions. [2021-12-15 09:45:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-12-15 09:45:00,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:00,573 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:00,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:45:00,573 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:00,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2103978010, now seen corresponding path program 1 times [2021-12-15 09:45:00,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:00,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141172976] [2021-12-15 09:45:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:00,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 252 proven. 110 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:45:00,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:00,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141172976] [2021-12-15 09:45:00,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141172976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:45:00,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069412244] [2021-12-15 09:45:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:00,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:45:00,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:45:00,776 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:45:00,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:45:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:00,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:45:00,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:45:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 09:45:01,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:45:01,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069412244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:01,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:45:01,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:45:01,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707909194] [2021-12-15 09:45:01,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:01,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:01,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:01,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:45:01,496 INFO L87 Difference]: Start difference. First operand 56234 states and 63085 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:04,331 INFO L93 Difference]: Finished difference Result 121905 states and 137273 transitions. [2021-12-15 09:45:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:04,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 448 [2021-12-15 09:45:04,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:04,410 INFO L225 Difference]: With dead ends: 121905 [2021-12-15 09:45:04,410 INFO L226 Difference]: Without dead ends: 66460 [2021-12-15 09:45:04,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:45:04,445 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 1124 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 3071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:04,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 395 Invalid, 3071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:45:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66460 states. [2021-12-15 09:45:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66460 to 66460. [2021-12-15 09:45:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66460 states, 66459 states have (on average 1.110564408131329) internal successors, (73807), 66459 states have internal predecessors, (73807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66460 states to 66460 states and 73807 transitions. [2021-12-15 09:45:05,074 INFO L78 Accepts]: Start accepts. Automaton has 66460 states and 73807 transitions. Word has length 448 [2021-12-15 09:45:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:05,075 INFO L470 AbstractCegarLoop]: Abstraction has 66460 states and 73807 transitions. [2021-12-15 09:45:05,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 66460 states and 73807 transitions. [2021-12-15 09:45:05,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-12-15 09:45:05,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:05,084 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:05,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 09:45:05,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 09:45:05,305 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:05,305 INFO L85 PathProgramCache]: Analyzing trace with hash -532305797, now seen corresponding path program 1 times [2021-12-15 09:45:05,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:05,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298063829] [2021-12-15 09:45:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:05,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 09:45:05,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:05,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298063829] [2021-12-15 09:45:05,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298063829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:05,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:05,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:45:05,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620443012] [2021-12-15 09:45:05,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:05,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:45:05,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:05,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:45:05,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:05,442 INFO L87 Difference]: Start difference. First operand 66460 states and 73807 transitions. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:11,623 INFO L93 Difference]: Finished difference Result 195257 states and 216872 transitions. [2021-12-15 09:45:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:45:11,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 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 454 [2021-12-15 09:45:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:11,783 INFO L225 Difference]: With dead ends: 195257 [2021-12-15 09:45:11,783 INFO L226 Difference]: Without dead ends: 129586 [2021-12-15 09:45:11,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:11,821 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 1915 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 6082 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 7199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 6082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:11,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1915 Valid, 650 Invalid, 7199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1117 Valid, 6082 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-15 09:45:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129586 states. [2021-12-15 09:45:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129586 to 124734. [2021-12-15 09:45:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124734 states, 124733 states have (on average 1.1032445303167566) internal successors, (137611), 124733 states have internal predecessors, (137611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124734 states to 124734 states and 137611 transitions. [2021-12-15 09:45:13,531 INFO L78 Accepts]: Start accepts. Automaton has 124734 states and 137611 transitions. Word has length 454 [2021-12-15 09:45:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:13,532 INFO L470 AbstractCegarLoop]: Abstraction has 124734 states and 137611 transitions. [2021-12-15 09:45:13,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:13,532 INFO L276 IsEmpty]: Start isEmpty. Operand 124734 states and 137611 transitions. [2021-12-15 09:45:13,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-12-15 09:45:13,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:13,543 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:13,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:45:13,543 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:13,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1121369338, now seen corresponding path program 1 times [2021-12-15 09:45:13,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:13,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976088986] [2021-12-15 09:45:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:13,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:45:13,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:13,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976088986] [2021-12-15 09:45:13,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976088986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:13,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:13,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:13,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247034005] [2021-12-15 09:45:13,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:13,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:45:13,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:13,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:45:13,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:13,670 INFO L87 Difference]: Start difference. First operand 124734 states and 137611 transitions. Second operand has 4 states, 4 states have (on average 117.5) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)