./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label49.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label49.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 e2ce90b08f9dc9315f13f0d8408b309f0856f833532caca0391f68d5a9cb9786 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:06:04,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:06:04,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:06:04,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:06:04,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:06:04,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:06:04,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:06:04,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:06:04,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:06:04,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:06:04,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:06:04,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:06:04,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:06:04,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:06:04,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:06:04,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:06:04,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:06:04,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:06:04,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:06:04,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:06:04,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:06:04,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:06:04,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:06:04,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:06:04,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:06:04,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:06:04,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:06:04,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:06:04,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:06:04,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:06:04,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:06:04,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:06:04,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:06:04,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:06:04,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:06:04,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:06:04,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:06:04,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:06:04,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:06:04,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:06:04,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:06:04,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:06:04,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:06:04,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:06:04,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:06:04,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:06:04,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:06:04,246 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:06:04,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:06:04,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:06:04,248 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:06:04,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:06:04,249 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:06:04,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:06:04,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:06:04,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:06:04,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:06:04,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:06:04,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:06:04,250 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:06:04,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:06:04,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:06:04,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:06:04,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:06:04,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:06:04,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:06:04,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:06:04,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:06:04,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:06:04,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:06:04,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:06:04,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:06:04,252 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:06:04,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:06:04,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:06:04,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:06:04,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2ce90b08f9dc9315f13f0d8408b309f0856f833532caca0391f68d5a9cb9786 [2021-12-15 09:06:04,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:06:04,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:06:04,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:06:04,528 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:06:04,529 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:06:04,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label49.c [2021-12-15 09:06:04,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c052d4923/296e9f2f184a4216ab66b06920b2c753/FLAG9ef7e598f [2021-12-15 09:06:05,168 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:06:05,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label49.c [2021-12-15 09:06:05,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c052d4923/296e9f2f184a4216ab66b06920b2c753/FLAG9ef7e598f [2021-12-15 09:06:05,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c052d4923/296e9f2f184a4216ab66b06920b2c753 [2021-12-15 09:06:05,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:06:05,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:06:05,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:06:05,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:06:05,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:06:05,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:06:05" (1/1) ... [2021-12-15 09:06:05,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663ba786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:05, skipping insertion in model container [2021-12-15 09:06:05,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:06:05" (1/1) ... [2021-12-15 09:06:05,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:06:05,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:06:06,046 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label49.c[56899,56912] [2021-12-15 09:06:06,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:06:06,086 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:06:06,316 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label49.c[56899,56912] [2021-12-15 09:06:06,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:06:06,345 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:06:06,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06 WrapperNode [2021-12-15 09:06:06,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:06:06,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:06:06,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:06:06,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:06:06,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06" (1/1) ... [2021-12-15 09:06:06,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06" (1/1) ... [2021-12-15 09:06:06,485 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 09:06:06,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:06:06,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:06:06,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:06:06,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:06:06,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06" (1/1) ... [2021-12-15 09:06:06,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06" (1/1) ... [2021-12-15 09:06:06,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06" (1/1) ... [2021-12-15 09:06:06,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06" (1/1) ... [2021-12-15 09:06:06,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06" (1/1) ... [2021-12-15 09:06:06,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06" (1/1) ... [2021-12-15 09:06:06,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06" (1/1) ... [2021-12-15 09:06:06,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:06:06,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:06:06,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:06:06,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:06:06,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06" (1/1) ... [2021-12-15 09:06:06,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:06:06,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:06,614 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 09:06:06,625 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 09:06:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:06:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:06:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:06:06,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:06:06,770 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:06:06,780 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:06:08,065 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:06:08,080 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:06:08,080 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:06:08,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:06:08 BoogieIcfgContainer [2021-12-15 09:06:08,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:06:08,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:06:08,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:06:08,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:06:08,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:06:05" (1/3) ... [2021-12-15 09:06:08,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6c272b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:06:08, skipping insertion in model container [2021-12-15 09:06:08,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:06" (2/3) ... [2021-12-15 09:06:08,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6c272b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:06:08, skipping insertion in model container [2021-12-15 09:06:08,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:06:08" (3/3) ... [2021-12-15 09:06:08,090 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label49.c [2021-12-15 09:06:08,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:06:08,094 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:06:08,140 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:06:08,147 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 09:06:08,147 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:06:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-15 09:06:08,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:08,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:08,180 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:08,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:08,184 INFO L85 PathProgramCache]: Analyzing trace with hash -781815326, now seen corresponding path program 1 times [2021-12-15 09:06:08,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:08,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020674614] [2021-12-15 09:06:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:08,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:08,674 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 09:06:08,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:08,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020674614] [2021-12-15 09:06:08,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020674614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:08,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:08,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:08,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974487002] [2021-12-15 09:06:08,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:08,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:08,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:08,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:08,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:08,714 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 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 09:06:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:09,710 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2021-12-15 09:06:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:09,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 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 168 [2021-12-15 09:06:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:09,726 INFO L225 Difference]: With dead ends: 857 [2021-12-15 09:06:09,726 INFO L226 Difference]: Without dead ends: 462 [2021-12-15 09:06:09,729 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 09:06:09,732 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 120 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:09,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:06:09,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-15 09:06:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-12-15 09:06:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 0 states have call successors, (0), 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 09:06:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2021-12-15 09:06:09,793 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 168 [2021-12-15 09:06:09,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:09,794 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2021-12-15 09:06:09,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 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 09:06:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2021-12-15 09:06:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-15 09:06:09,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:09,809 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:06:09,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:06:09,809 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:09,810 INFO L85 PathProgramCache]: Analyzing trace with hash 854785153, now seen corresponding path program 1 times [2021-12-15 09:06:09,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:09,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518208182] [2021-12-15 09:06:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:09,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:09,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:09,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518208182] [2021-12-15 09:06:09,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518208182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:09,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:09,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:09,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845569306] [2021-12-15 09:06:09,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:09,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:09,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:09,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:09,911 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 09:06:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:10,611 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2021-12-15 09:06:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:10,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 09:06:10,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:10,619 INFO L225 Difference]: With dead ends: 1344 [2021-12-15 09:06:10,619 INFO L226 Difference]: Without dead ends: 886 [2021-12-15 09:06:10,620 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 09:06:10,621 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:10,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:06:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-15 09:06:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2021-12-15 09:06:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5120828538550057) internal successors, (1314), 869 states have internal predecessors, (1314), 0 states have call successors, (0), 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 09:06:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1314 transitions. [2021-12-15 09:06:10,685 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1314 transitions. Word has length 176 [2021-12-15 09:06:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:10,686 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1314 transitions. [2021-12-15 09:06:10,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 09:06:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1314 transitions. [2021-12-15 09:06:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-15 09:06:10,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:10,689 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:10,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:06:10,690 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:10,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:10,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1893411240, now seen corresponding path program 1 times [2021-12-15 09:06:10,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:10,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6300678] [2021-12-15 09:06:10,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:10,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 09:06:10,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6300678] [2021-12-15 09:06:10,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6300678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:10,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:10,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:06:10,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127062669] [2021-12-15 09:06:10,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:10,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:10,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:10,771 INFO L87 Difference]: Start difference. First operand 870 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 09:06:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:10,984 INFO L93 Difference]: Finished difference Result 2583 states and 3908 transitions. [2021-12-15 09:06:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:10,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 188 [2021-12-15 09:06:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:10,991 INFO L225 Difference]: With dead ends: 2583 [2021-12-15 09:06:10,991 INFO L226 Difference]: Without dead ends: 1715 [2021-12-15 09:06:10,992 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 09:06:10,994 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 361 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:10,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 585 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 09:06:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-12-15 09:06:11,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1711. [2021-12-15 09:06:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 1.5140350877192983) internal successors, (2589), 1710 states have internal predecessors, (2589), 0 states have call successors, (0), 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 09:06:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2589 transitions. [2021-12-15 09:06:11,037 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2589 transitions. Word has length 188 [2021-12-15 09:06:11,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:11,037 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 2589 transitions. [2021-12-15 09:06:11,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 09:06:11,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2589 transitions. [2021-12-15 09:06:11,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-15 09:06:11,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:11,042 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:11,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:06:11,042 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:11,043 INFO L85 PathProgramCache]: Analyzing trace with hash 651483907, now seen corresponding path program 1 times [2021-12-15 09:06:11,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:11,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769530567] [2021-12-15 09:06:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:11,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:11,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:11,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769530567] [2021-12-15 09:06:11,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769530567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:11,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904850437] [2021-12-15 09:06:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:11,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:11,112 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 09:06:11,147 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 09:06:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:11,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:06:11,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:11,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904850437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:11,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:11,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:06:11,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926710364] [2021-12-15 09:06:11,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:11,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:11,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:11,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:11,661 INFO L87 Difference]: Start difference. First operand 1711 states and 2589 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:12,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:12,402 INFO L93 Difference]: Finished difference Result 5050 states and 7657 transitions. [2021-12-15 09:06:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:12,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-12-15 09:06:12,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:12,414 INFO L225 Difference]: With dead ends: 5050 [2021-12-15 09:06:12,414 INFO L226 Difference]: Without dead ends: 3341 [2021-12-15 09:06:12,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:12,417 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 230 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:12,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 417 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:06:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-12-15 09:06:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 3338. [2021-12-15 09:06:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.3359304764758766) internal successors, (4458), 3337 states have internal predecessors, (4458), 0 states have call successors, (0), 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 09:06:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4458 transitions. [2021-12-15 09:06:12,488 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4458 transitions. Word has length 190 [2021-12-15 09:06:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:12,488 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 4458 transitions. [2021-12-15 09:06:12,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4458 transitions. [2021-12-15 09:06:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-15 09:06:12,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:12,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:12,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 09:06:12,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:12,724 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1330338245, now seen corresponding path program 1 times [2021-12-15 09:06:12,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:12,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256681363] [2021-12-15 09:06:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:12,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:12,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:12,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256681363] [2021-12-15 09:06:12,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256681363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:12,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:12,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:12,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689099298] [2021-12-15 09:06:12,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:12,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:12,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:12,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:12,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:12,787 INFO L87 Difference]: Start difference. First operand 3338 states and 4458 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:13,420 INFO L93 Difference]: Finished difference Result 9969 states and 13324 transitions. [2021-12-15 09:06:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:13,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-12-15 09:06:13,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:13,442 INFO L225 Difference]: With dead ends: 9969 [2021-12-15 09:06:13,443 INFO L226 Difference]: Without dead ends: 6633 [2021-12-15 09:06:13,448 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 09:06:13,449 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:13,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 123 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2021-12-15 09:06:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 6621. [2021-12-15 09:06:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6621 states, 6620 states have (on average 1.322809667673716) internal successors, (8757), 6620 states have internal predecessors, (8757), 0 states have call successors, (0), 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 09:06:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6621 states to 6621 states and 8757 transitions. [2021-12-15 09:06:13,578 INFO L78 Accepts]: Start accepts. Automaton has 6621 states and 8757 transitions. Word has length 191 [2021-12-15 09:06:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:13,578 INFO L470 AbstractCegarLoop]: Abstraction has 6621 states and 8757 transitions. [2021-12-15 09:06:13,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 6621 states and 8757 transitions. [2021-12-15 09:06:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-15 09:06:13,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:13,621 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:13,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:06:13,621 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:13,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1613786835, now seen corresponding path program 1 times [2021-12-15 09:06:13,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:13,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103323587] [2021-12-15 09:06:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:13,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:13,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:13,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103323587] [2021-12-15 09:06:13,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103323587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:13,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:13,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:13,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685917021] [2021-12-15 09:06:13,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:13,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:13,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:13,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:13,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:13,682 INFO L87 Difference]: Start difference. First operand 6621 states and 8757 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 09:06:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:14,300 INFO L93 Difference]: Finished difference Result 17349 states and 23252 transitions. [2021-12-15 09:06:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:14,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2021-12-15 09:06:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:14,341 INFO L225 Difference]: With dead ends: 17349 [2021-12-15 09:06:14,341 INFO L226 Difference]: Without dead ends: 10730 [2021-12-15 09:06:14,352 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 09:06:14,353 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 217 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:14,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 153 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10730 states. [2021-12-15 09:06:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10730 to 9264. [2021-12-15 09:06:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9264 states, 9263 states have (on average 1.379466695455036) internal successors, (12778), 9263 states have internal predecessors, (12778), 0 states have call successors, (0), 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 09:06:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9264 states to 9264 states and 12778 transitions. [2021-12-15 09:06:14,591 INFO L78 Accepts]: Start accepts. Automaton has 9264 states and 12778 transitions. Word has length 194 [2021-12-15 09:06:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:14,592 INFO L470 AbstractCegarLoop]: Abstraction has 9264 states and 12778 transitions. [2021-12-15 09:06:14,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 09:06:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 9264 states and 12778 transitions. [2021-12-15 09:06:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-15 09:06:14,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:14,605 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:14,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:06:14,605 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1523843920, now seen corresponding path program 1 times [2021-12-15 09:06:14,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:14,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586168954] [2021-12-15 09:06:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:14,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 09:06:14,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:14,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586168954] [2021-12-15 09:06:14,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586168954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:14,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:14,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:14,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158519577] [2021-12-15 09:06:14,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:14,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:14,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:14,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:14,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:14,673 INFO L87 Difference]: Start difference. First operand 9264 states and 12778 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:15,035 INFO L93 Difference]: Finished difference Result 16827 states and 23048 transitions. [2021-12-15 09:06:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:15,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-12-15 09:06:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:15,057 INFO L225 Difference]: With dead ends: 16827 [2021-12-15 09:06:15,058 INFO L226 Difference]: Without dead ends: 7971 [2021-12-15 09:06:15,069 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 09:06:15,070 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 321 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:15,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:06:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7971 states. [2021-12-15 09:06:15,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7971 to 7971. [2021-12-15 09:06:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7971 states, 7970 states have (on average 1.3189460476787955) internal successors, (10512), 7970 states have internal predecessors, (10512), 0 states have call successors, (0), 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 09:06:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7971 states to 7971 states and 10512 transitions. [2021-12-15 09:06:15,273 INFO L78 Accepts]: Start accepts. Automaton has 7971 states and 10512 transitions. Word has length 203 [2021-12-15 09:06:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:15,274 INFO L470 AbstractCegarLoop]: Abstraction has 7971 states and 10512 transitions. [2021-12-15 09:06:15,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 7971 states and 10512 transitions. [2021-12-15 09:06:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-15 09:06:15,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:15,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:15,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:06:15,286 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:15,287 INFO L85 PathProgramCache]: Analyzing trace with hash 441011150, now seen corresponding path program 1 times [2021-12-15 09:06:15,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:15,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727453541] [2021-12-15 09:06:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:15,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:15,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:15,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727453541] [2021-12-15 09:06:15,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727453541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:15,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870761751] [2021-12-15 09:06:15,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:15,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:15,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:15,373 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:15,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:06:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:15,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 09:06:15,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:15,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870761751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:15,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:15,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:06:15,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173927215] [2021-12-15 09:06:15,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:15,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:15,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:15,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:15,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:15,885 INFO L87 Difference]: Start difference. First operand 7971 states and 10512 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:16,543 INFO L93 Difference]: Finished difference Result 22861 states and 30269 transitions. [2021-12-15 09:06:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-12-15 09:06:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:16,578 INFO L225 Difference]: With dead ends: 22861 [2021-12-15 09:06:16,578 INFO L226 Difference]: Without dead ends: 14892 [2021-12-15 09:06:16,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:16,594 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:16,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 102 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14892 states. [2021-12-15 09:06:16,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14892 to 11228. [2021-12-15 09:06:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11228 states, 11227 states have (on average 1.317805290816781) internal successors, (14795), 11227 states have internal predecessors, (14795), 0 states have call successors, (0), 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 09:06:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11228 states to 11228 states and 14795 transitions. [2021-12-15 09:06:16,804 INFO L78 Accepts]: Start accepts. Automaton has 11228 states and 14795 transitions. Word has length 205 [2021-12-15 09:06:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:16,804 INFO L470 AbstractCegarLoop]: Abstraction has 11228 states and 14795 transitions. [2021-12-15 09:06:16,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 11228 states and 14795 transitions. [2021-12-15 09:06:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-15 09:06:16,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:16,823 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:16,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:17,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-15 09:06:17,040 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash -236027744, now seen corresponding path program 1 times [2021-12-15 09:06:17,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:17,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16569763] [2021-12-15 09:06:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:17,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 09:06:17,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:17,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16569763] [2021-12-15 09:06:17,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16569763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:17,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:17,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:17,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915690604] [2021-12-15 09:06:17,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:17,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:17,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:17,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:17,153 INFO L87 Difference]: Start difference. First operand 11228 states and 14795 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:17,852 INFO L93 Difference]: Finished difference Result 27557 states and 36521 transitions. [2021-12-15 09:06:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-12-15 09:06:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:17,883 INFO L225 Difference]: With dead ends: 27557 [2021-12-15 09:06:17,883 INFO L226 Difference]: Without dead ends: 16331 [2021-12-15 09:06:17,900 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 09:06:17,902 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 201 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:17,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 131 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-12-15 09:06:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 15916. [2021-12-15 09:06:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15916 states, 15915 states have (on average 1.3334590009425071) internal successors, (21222), 15915 states have internal predecessors, (21222), 0 states have call successors, (0), 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 09:06:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15916 states to 15916 states and 21222 transitions. [2021-12-15 09:06:18,166 INFO L78 Accepts]: Start accepts. Automaton has 15916 states and 21222 transitions. Word has length 211 [2021-12-15 09:06:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:18,166 INFO L470 AbstractCegarLoop]: Abstraction has 15916 states and 21222 transitions. [2021-12-15 09:06:18,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 15916 states and 21222 transitions. [2021-12-15 09:06:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-15 09:06:18,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:18,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:18,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:06:18,182 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:18,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 2021485274, now seen corresponding path program 1 times [2021-12-15 09:06:18,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:18,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491129566] [2021-12-15 09:06:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:18,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 09:06:18,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:18,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491129566] [2021-12-15 09:06:18,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491129566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:18,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:18,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:18,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146668462] [2021-12-15 09:06:18,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:18,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:18,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:18,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:18,258 INFO L87 Difference]: Start difference. First operand 15916 states and 21222 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 09:06:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:19,053 INFO L93 Difference]: Finished difference Result 37532 states and 49750 transitions. [2021-12-15 09:06:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 213 [2021-12-15 09:06:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:19,091 INFO L225 Difference]: With dead ends: 37532 [2021-12-15 09:06:19,091 INFO L226 Difference]: Without dead ends: 22025 [2021-12-15 09:06:19,112 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 09:06:19,113 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 202 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:19,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 118 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22025 states. [2021-12-15 09:06:19,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22025 to 20800. [2021-12-15 09:06:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20800 states, 20799 states have (on average 1.307851339006683) internal successors, (27202), 20799 states have internal predecessors, (27202), 0 states have call successors, (0), 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 09:06:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20800 states to 20800 states and 27202 transitions. [2021-12-15 09:06:19,519 INFO L78 Accepts]: Start accepts. Automaton has 20800 states and 27202 transitions. Word has length 213 [2021-12-15 09:06:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:19,519 INFO L470 AbstractCegarLoop]: Abstraction has 20800 states and 27202 transitions. [2021-12-15 09:06:19,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 09:06:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand 20800 states and 27202 transitions. [2021-12-15 09:06:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-15 09:06:19,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:19,537 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:19,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:06:19,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:19,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1629645138, now seen corresponding path program 1 times [2021-12-15 09:06:19,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:19,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314797120] [2021-12-15 09:06:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:19,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 09:06:19,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:19,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314797120] [2021-12-15 09:06:19,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314797120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:19,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:19,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:19,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135629796] [2021-12-15 09:06:19,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:19,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:19,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:19,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:19,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:19,613 INFO L87 Difference]: Start difference. First operand 20800 states and 27202 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:20,471 INFO L93 Difference]: Finished difference Result 39351 states and 50855 transitions. [2021-12-15 09:06:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:20,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-12-15 09:06:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:20,507 INFO L225 Difference]: With dead ends: 39351 [2021-12-15 09:06:20,508 INFO L226 Difference]: Without dead ends: 25486 [2021-12-15 09:06:20,519 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 09:06:20,520 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 186 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:20,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 128 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25486 states. [2021-12-15 09:06:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25486 to 25481. [2021-12-15 09:06:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25481 states, 25480 states have (on average 1.2957613814756672) internal successors, (33016), 25480 states have internal predecessors, (33016), 0 states have call successors, (0), 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 09:06:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25481 states to 25481 states and 33016 transitions. [2021-12-15 09:06:20,948 INFO L78 Accepts]: Start accepts. Automaton has 25481 states and 33016 transitions. Word has length 222 [2021-12-15 09:06:20,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:20,949 INFO L470 AbstractCegarLoop]: Abstraction has 25481 states and 33016 transitions. [2021-12-15 09:06:20,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 25481 states and 33016 transitions. [2021-12-15 09:06:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-15 09:06:20,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:20,976 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:20,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:06:20,977 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:20,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1064424771, now seen corresponding path program 2 times [2021-12-15 09:06:20,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:20,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566964378] [2021-12-15 09:06:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:20,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 09:06:21,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:21,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566964378] [2021-12-15 09:06:21,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566964378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:21,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:21,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:06:21,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400177214] [2021-12-15 09:06:21,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:21,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:21,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:21,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:21,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:21,056 INFO L87 Difference]: Start difference. First operand 25481 states and 33016 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 09:06:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:21,886 INFO L93 Difference]: Finished difference Result 59483 states and 78631 transitions. [2021-12-15 09:06:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:21,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 229 [2021-12-15 09:06:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:21,933 INFO L225 Difference]: With dead ends: 59483 [2021-12-15 09:06:21,933 INFO L226 Difference]: Without dead ends: 34004 [2021-12-15 09:06:21,957 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 09:06:21,958 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 214 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:21,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 149 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34004 states. [2021-12-15 09:06:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34004 to 34004. [2021-12-15 09:06:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34004 states, 34003 states have (on average 1.2248919213010616) internal successors, (41650), 34003 states have internal predecessors, (41650), 0 states have call successors, (0), 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 09:06:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34004 states to 34004 states and 41650 transitions. [2021-12-15 09:06:22,493 INFO L78 Accepts]: Start accepts. Automaton has 34004 states and 41650 transitions. Word has length 229 [2021-12-15 09:06:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:22,493 INFO L470 AbstractCegarLoop]: Abstraction has 34004 states and 41650 transitions. [2021-12-15 09:06:22,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 09:06:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 34004 states and 41650 transitions. [2021-12-15 09:06:22,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-15 09:06:22,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:22,511 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:22,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:06:22,511 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:22,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:22,512 INFO L85 PathProgramCache]: Analyzing trace with hash -480187620, now seen corresponding path program 1 times [2021-12-15 09:06:22,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:22,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522133287] [2021-12-15 09:06:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:22,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 09:06:22,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522133287] [2021-12-15 09:06:22,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522133287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:22,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:22,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:22,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187490464] [2021-12-15 09:06:22,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:22,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:22,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:22,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:22,604 INFO L87 Difference]: Start difference. First operand 34004 states and 41650 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 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 09:06:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:23,528 INFO L93 Difference]: Finished difference Result 62301 states and 75904 transitions. [2021-12-15 09:06:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:23,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 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 238 [2021-12-15 09:06:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:23,579 INFO L225 Difference]: With dead ends: 62301 [2021-12-15 09:06:23,579 INFO L226 Difference]: Without dead ends: 39289 [2021-12-15 09:06:23,597 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 09:06:23,598 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 154 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:23,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 165 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39289 states. [2021-12-15 09:06:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39289 to 39282. [2021-12-15 09:06:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39282 states, 39281 states have (on average 1.215600417504646) internal successors, (47750), 39281 states have internal predecessors, (47750), 0 states have call successors, (0), 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 09:06:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39282 states to 39282 states and 47750 transitions. [2021-12-15 09:06:24,139 INFO L78 Accepts]: Start accepts. Automaton has 39282 states and 47750 transitions. Word has length 238 [2021-12-15 09:06:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:24,139 INFO L470 AbstractCegarLoop]: Abstraction has 39282 states and 47750 transitions. [2021-12-15 09:06:24,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 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 09:06:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 39282 states and 47750 transitions. [2021-12-15 09:06:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-15 09:06:24,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:24,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:24,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:06:24,160 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash 342018478, now seen corresponding path program 1 times [2021-12-15 09:06:24,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:24,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171104449] [2021-12-15 09:06:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:24,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:24,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171104449] [2021-12-15 09:06:24,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171104449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:24,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:24,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:24,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670052997] [2021-12-15 09:06:24,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:24,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:24,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:24,269 INFO L87 Difference]: Start difference. First operand 39282 states and 47750 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 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 09:06:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:25,057 INFO L93 Difference]: Finished difference Result 67371 states and 81595 transitions. [2021-12-15 09:06:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 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 242 [2021-12-15 09:06:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:25,094 INFO L225 Difference]: With dead ends: 67371 [2021-12-15 09:06:25,094 INFO L226 Difference]: Without dead ends: 39690 [2021-12-15 09:06:25,112 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 09:06:25,112 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:25,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 152 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39690 states. [2021-12-15 09:06:25,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39690 to 39688. [2021-12-15 09:06:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39688 states, 39687 states have (on average 1.214604278479099) internal successors, (48204), 39687 states have internal predecessors, (48204), 0 states have call successors, (0), 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 09:06:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39688 states to 39688 states and 48204 transitions. [2021-12-15 09:06:25,649 INFO L78 Accepts]: Start accepts. Automaton has 39688 states and 48204 transitions. Word has length 242 [2021-12-15 09:06:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:25,649 INFO L470 AbstractCegarLoop]: Abstraction has 39688 states and 48204 transitions. [2021-12-15 09:06:25,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 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 09:06:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 39688 states and 48204 transitions. [2021-12-15 09:06:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-15 09:06:25,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:25,669 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:25,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:06:25,669 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:25,670 INFO L85 PathProgramCache]: Analyzing trace with hash -735414649, now seen corresponding path program 2 times [2021-12-15 09:06:25,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:25,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404473943] [2021-12-15 09:06:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:25,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 82 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 09:06:25,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:25,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404473943] [2021-12-15 09:06:25,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404473943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:25,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287605284] [2021-12-15 09:06:25,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 09:06:25,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:25,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:25,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:25,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:06:25,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 09:06:25,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 09:06:25,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:06:25,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 09:06:26,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:26,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287605284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:26,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:26,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-12-15 09:06:26,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657165043] [2021-12-15 09:06:26,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:26,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:26,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:06:26,447 INFO L87 Difference]: Start difference. First operand 39688 states and 48204 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:27,511 INFO L93 Difference]: Finished difference Result 84859 states and 103561 transitions. [2021-12-15 09:06:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:27,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-12-15 09:06:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:27,560 INFO L225 Difference]: With dead ends: 84859 [2021-12-15 09:06:27,560 INFO L226 Difference]: Without dead ends: 46798 [2021-12-15 09:06:27,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:06:27,587 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 155 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:27,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 159 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:06:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46798 states. [2021-12-15 09:06:28,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46798 to 45781. [2021-12-15 09:06:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45781 states, 45780 states have (on average 1.2005242463958061) internal successors, (54960), 45780 states have internal predecessors, (54960), 0 states have call successors, (0), 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 09:06:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45781 states to 45781 states and 54960 transitions. [2021-12-15 09:06:28,162 INFO L78 Accepts]: Start accepts. Automaton has 45781 states and 54960 transitions. Word has length 245 [2021-12-15 09:06:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:28,163 INFO L470 AbstractCegarLoop]: Abstraction has 45781 states and 54960 transitions. [2021-12-15 09:06:28,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 45781 states and 54960 transitions. [2021-12-15 09:06:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-15 09:06:28,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:28,188 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:28,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:28,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:28,412 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:28,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1915945221, now seen corresponding path program 1 times [2021-12-15 09:06:28,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:28,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624037078] [2021-12-15 09:06:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:28,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 09:06:28,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:28,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624037078] [2021-12-15 09:06:28,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624037078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:28,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:28,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:06:28,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597732251] [2021-12-15 09:06:28,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:28,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:06:28,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:28,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:06:28,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:06:28,521 INFO L87 Difference]: Start difference. First operand 45781 states and 54960 transitions. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 09:06:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:29,579 INFO L93 Difference]: Finished difference Result 98449 states and 119091 transitions. [2021-12-15 09:06:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:06:29,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 275 [2021-12-15 09:06:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:29,641 INFO L225 Difference]: With dead ends: 98449 [2021-12-15 09:06:29,641 INFO L226 Difference]: Without dead ends: 55109 [2021-12-15 09:06:29,676 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 09:06:29,676 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 434 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:29,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 56 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:06:29,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55109 states. [2021-12-15 09:06:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55109 to 55109. [2021-12-15 09:06:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55109 states, 55108 states have (on average 1.1655476518835741) internal successors, (64231), 55108 states have internal predecessors, (64231), 0 states have call successors, (0), 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 09:06:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55109 states to 55109 states and 64231 transitions. [2021-12-15 09:06:30,581 INFO L78 Accepts]: Start accepts. Automaton has 55109 states and 64231 transitions. Word has length 275 [2021-12-15 09:06:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:30,582 INFO L470 AbstractCegarLoop]: Abstraction has 55109 states and 64231 transitions. [2021-12-15 09:06:30,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 09:06:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 55109 states and 64231 transitions. [2021-12-15 09:06:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-12-15 09:06:30,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:30,608 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:30,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:06:30,608 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:30,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:30,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1978795867, now seen corresponding path program 1 times [2021-12-15 09:06:30,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:30,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336480878] [2021-12-15 09:06:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:30,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-15 09:06:30,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:30,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336480878] [2021-12-15 09:06:30,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336480878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:30,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:30,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:30,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079377761] [2021-12-15 09:06:30,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:30,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:30,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:30,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:30,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:30,688 INFO L87 Difference]: Start difference. First operand 55109 states and 64231 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 09:06:31,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:31,517 INFO L93 Difference]: Finished difference Result 102286 states and 119159 transitions. [2021-12-15 09:06:31,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:31,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 276 [2021-12-15 09:06:31,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:31,576 INFO L225 Difference]: With dead ends: 102286 [2021-12-15 09:06:31,576 INFO L226 Difference]: Without dead ends: 55515 [2021-12-15 09:06:31,599 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 09:06:31,599 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 172 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:31,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 159 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:31,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55515 states. [2021-12-15 09:06:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55515 to 55515. [2021-12-15 09:06:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55515 states, 55514 states have (on average 1.1645891126562669) internal successors, (64651), 55514 states have internal predecessors, (64651), 0 states have call successors, (0), 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 09:06:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55515 states to 55515 states and 64651 transitions. [2021-12-15 09:06:32,573 INFO L78 Accepts]: Start accepts. Automaton has 55515 states and 64651 transitions. Word has length 276 [2021-12-15 09:06:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:32,573 INFO L470 AbstractCegarLoop]: Abstraction has 55515 states and 64651 transitions. [2021-12-15 09:06:32,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 09:06:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 55515 states and 64651 transitions. [2021-12-15 09:06:32,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-15 09:06:32,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:32,602 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:32,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 09:06:32,602 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:32,602 INFO L85 PathProgramCache]: Analyzing trace with hash 633248720, now seen corresponding path program 1 times [2021-12-15 09:06:32,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:32,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428603653] [2021-12-15 09:06:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:32,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-15 09:06:32,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:32,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428603653] [2021-12-15 09:06:32,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428603653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:32,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130201984] [2021-12-15 09:06:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:32,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:32,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:32,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:32,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:06:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:32,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-15 09:06:33,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:33,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130201984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:33,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:33,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:06:33,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029439406] [2021-12-15 09:06:33,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:33,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:33,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:33,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:33,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:33,380 INFO L87 Difference]: Start difference. First operand 55515 states and 64651 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 09:06:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:34,382 INFO L93 Difference]: Finished difference Result 131575 states and 153855 transitions. [2021-12-15 09:06:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 283 [2021-12-15 09:06:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:34,472 INFO L225 Difference]: With dead ends: 131575 [2021-12-15 09:06:34,472 INFO L226 Difference]: Without dead ends: 78704 [2021-12-15 09:06:34,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:34,509 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 86 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:34,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 127 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78704 states. [2021-12-15 09:06:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78704 to 78697. [2021-12-15 09:06:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78697 states, 78696 states have (on average 1.1500965741587883) internal successors, (90508), 78696 states have internal predecessors, (90508), 0 states have call successors, (0), 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 09:06:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78697 states to 78697 states and 90508 transitions. [2021-12-15 09:06:35,547 INFO L78 Accepts]: Start accepts. Automaton has 78697 states and 90508 transitions. Word has length 283 [2021-12-15 09:06:35,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:35,548 INFO L470 AbstractCegarLoop]: Abstraction has 78697 states and 90508 transitions. [2021-12-15 09:06:35,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 09:06:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 78697 states and 90508 transitions. [2021-12-15 09:06:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 09:06:35,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:35,592 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:35,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:35,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 09:06:35,793 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:35,794 INFO L85 PathProgramCache]: Analyzing trace with hash 104456279, now seen corresponding path program 1 times [2021-12-15 09:06:35,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:35,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877179657] [2021-12-15 09:06:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:35,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 104 proven. 12 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-15 09:06:35,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:35,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877179657] [2021-12-15 09:06:35,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877179657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:35,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312615579] [2021-12-15 09:06:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:35,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:35,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:35,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:35,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:06:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:36,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:06:36,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:36,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312615579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:36,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:36,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:36,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041287626] [2021-12-15 09:06:36,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:36,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:36,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:36,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:36,490 INFO L87 Difference]: Start difference. First operand 78697 states and 90508 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 09:06:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:37,365 INFO L93 Difference]: Finished difference Result 204356 states and 235648 transitions. [2021-12-15 09:06:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:37,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 306 [2021-12-15 09:06:37,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:37,513 INFO L225 Difference]: With dead ends: 204356 [2021-12-15 09:06:37,513 INFO L226 Difference]: Without dead ends: 128506 [2021-12-15 09:06:37,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:37,574 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 224 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:37,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 804 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 09:06:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128506 states. [2021-12-15 09:06:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128506 to 128500. [2021-12-15 09:06:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128500 states, 128499 states have (on average 1.1403979797508152) internal successors, (146540), 128499 states have internal predecessors, (146540), 0 states have call successors, (0), 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 09:06:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128500 states to 128500 states and 146540 transitions. [2021-12-15 09:06:39,480 INFO L78 Accepts]: Start accepts. Automaton has 128500 states and 146540 transitions. Word has length 306 [2021-12-15 09:06:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:39,480 INFO L470 AbstractCegarLoop]: Abstraction has 128500 states and 146540 transitions. [2021-12-15 09:06:39,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 09:06:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 128500 states and 146540 transitions. [2021-12-15 09:06:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-15 09:06:39,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:39,555 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:39,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:39,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:39,756 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:39,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:39,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1911611869, now seen corresponding path program 1 times [2021-12-15 09:06:39,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:39,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654950043] [2021-12-15 09:06:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:39,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 143 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-15 09:06:39,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:39,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654950043] [2021-12-15 09:06:39,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654950043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:39,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577507877] [2021-12-15 09:06:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:39,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:39,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:39,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:39,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:06:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:40,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-15 09:06:40,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:40,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577507877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:40,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:40,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:40,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387626109] [2021-12-15 09:06:40,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:40,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:40,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:40,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:40,568 INFO L87 Difference]: Start difference. First operand 128500 states and 146540 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:41,901 INFO L93 Difference]: Finished difference Result 253748 states and 289415 transitions. [2021-12-15 09:06:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:41,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 308 [2021-12-15 09:06:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:42,053 INFO L225 Difference]: With dead ends: 253748 [2021-12-15 09:06:42,053 INFO L226 Difference]: Without dead ends: 127078 [2021-12-15 09:06:42,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:42,126 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 92 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:42,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 290 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:06:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127078 states. [2021-12-15 09:06:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127078 to 122600. [2021-12-15 09:06:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122600 states, 122599 states have (on average 1.12856548585225) internal successors, (138361), 122599 states have internal predecessors, (138361), 0 states have call successors, (0), 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 09:06:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122600 states to 122600 states and 138361 transitions. [2021-12-15 09:06:43,798 INFO L78 Accepts]: Start accepts. Automaton has 122600 states and 138361 transitions. Word has length 308 [2021-12-15 09:06:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:43,799 INFO L470 AbstractCegarLoop]: Abstraction has 122600 states and 138361 transitions. [2021-12-15 09:06:43,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 122600 states and 138361 transitions. [2021-12-15 09:06:43,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-12-15 09:06:43,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:43,866 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:43,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:44,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:44,067 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:44,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:44,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1411476975, now seen corresponding path program 1 times [2021-12-15 09:06:44,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:44,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157541012] [2021-12-15 09:06:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:44,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 09:06:44,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:44,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157541012] [2021-12-15 09:06:44,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157541012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:44,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:44,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:06:44,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81778345] [2021-12-15 09:06:44,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:44,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:44,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:44,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:44,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:44,167 INFO L87 Difference]: Start difference. First operand 122600 states and 138361 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 09:06:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:45,544 INFO L93 Difference]: Finished difference Result 216523 states and 243704 transitions. [2021-12-15 09:06:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:45,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 317 [2021-12-15 09:06:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:45,650 INFO L225 Difference]: With dead ends: 216523 [2021-12-15 09:06:45,650 INFO L226 Difference]: Without dead ends: 95551 [2021-12-15 09:06:45,716 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 09:06:45,717 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 229 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:45,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 327 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:06:45,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95551 states. [2021-12-15 09:06:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95551 to 91073. [2021-12-15 09:06:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91073 states, 91072 states have (on average 1.104719342937456) internal successors, (100609), 91072 states have internal predecessors, (100609), 0 states have call successors, (0), 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 09:06:47,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91073 states to 91073 states and 100609 transitions. [2021-12-15 09:06:47,540 INFO L78 Accepts]: Start accepts. Automaton has 91073 states and 100609 transitions. Word has length 317 [2021-12-15 09:06:47,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:47,541 INFO L470 AbstractCegarLoop]: Abstraction has 91073 states and 100609 transitions. [2021-12-15 09:06:47,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 09:06:47,541 INFO L276 IsEmpty]: Start isEmpty. Operand 91073 states and 100609 transitions. [2021-12-15 09:06:47,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-12-15 09:06:47,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:47,603 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:47,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 09:06:47,603 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:47,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2067797645, now seen corresponding path program 1 times [2021-12-15 09:06:47,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:47,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374309377] [2021-12-15 09:06:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:47,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 09:06:47,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374309377] [2021-12-15 09:06:47,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374309377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:47,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:47,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:06:47,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651608233] [2021-12-15 09:06:47,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:47,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:06:47,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:47,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:06:47,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:06:47,743 INFO L87 Difference]: Start difference. First operand 91073 states and 100609 transitions. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 09:06:48,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:48,800 INFO L93 Difference]: Finished difference Result 230325 states and 254560 transitions. [2021-12-15 09:06:48,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:06:48,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 349 [2021-12-15 09:06:48,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:49,276 INFO L225 Difference]: With dead ends: 230325 [2021-12-15 09:06:49,276 INFO L226 Difference]: Without dead ends: 141286 [2021-12-15 09:06:49,329 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 09:06:49,330 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 796 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:49,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 49 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141286 states. [2021-12-15 09:06:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141286 to 138444. [2021-12-15 09:06:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138444 states, 138443 states have (on average 1.106570935330786) internal successors, (153197), 138443 states have internal predecessors, (153197), 0 states have call successors, (0), 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 09:06:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138444 states to 138444 states and 153197 transitions. [2021-12-15 09:06:51,477 INFO L78 Accepts]: Start accepts. Automaton has 138444 states and 153197 transitions. Word has length 349 [2021-12-15 09:06:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:51,478 INFO L470 AbstractCegarLoop]: Abstraction has 138444 states and 153197 transitions. [2021-12-15 09:06:51,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 09:06:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 138444 states and 153197 transitions. [2021-12-15 09:06:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-12-15 09:06:51,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:51,599 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:51,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 09:06:51,599 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:51,600 INFO L85 PathProgramCache]: Analyzing trace with hash -805353426, now seen corresponding path program 1 times [2021-12-15 09:06:51,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:51,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307425847] [2021-12-15 09:06:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:51,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 104 proven. 12 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-12-15 09:06:51,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:51,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307425847] [2021-12-15 09:06:51,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307425847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:51,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852746183] [2021-12-15 09:06:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:51,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:51,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:51,703 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:51,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:06:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:51,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:06:52,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:52,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852746183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:52,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:52,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:52,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652889567] [2021-12-15 09:06:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:52,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:52,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:52,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:52,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:52,391 INFO L87 Difference]: Start difference. First operand 138444 states and 153197 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 09:06:53,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:53,884 INFO L93 Difference]: Finished difference Result 269567 states and 298351 transitions. [2021-12-15 09:06:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:53,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 389 [2021-12-15 09:06:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:54,056 INFO L225 Difference]: With dead ends: 269567 [2021-12-15 09:06:54,056 INFO L226 Difference]: Without dead ends: 133157 [2021-12-15 09:06:54,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:54,126 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 117 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:54,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 94 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133157 states. [2021-12-15 09:06:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133157 to 107362. [2021-12-15 09:06:55,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107362 states, 107361 states have (on average 1.0865677480649398) internal successors, (116655), 107361 states have internal predecessors, (116655), 0 states have call successors, (0), 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 09:06:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107362 states to 107362 states and 116655 transitions. [2021-12-15 09:06:55,609 INFO L78 Accepts]: Start accepts. Automaton has 107362 states and 116655 transitions. Word has length 389 [2021-12-15 09:06:55,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:55,609 INFO L470 AbstractCegarLoop]: Abstraction has 107362 states and 116655 transitions. [2021-12-15 09:06:55,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 09:06:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 107362 states and 116655 transitions. [2021-12-15 09:06:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-12-15 09:06:55,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:55,682 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:55,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:55,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:55,884 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash 402375071, now seen corresponding path program 1 times [2021-12-15 09:06:55,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:55,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384622622] [2021-12-15 09:06:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:55,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 130 proven. 12 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-12-15 09:06:56,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:56,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384622622] [2021-12-15 09:06:56,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384622622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:56,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859448402] [2021-12-15 09:06:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:56,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:56,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:56,382 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:56,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:06:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:56,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:06:56,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-15 09:06:57,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:57,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859448402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:57,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:57,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:57,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595910941] [2021-12-15 09:06:57,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:57,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:57,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:57,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:57,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:57,076 INFO L87 Difference]: Start difference. First operand 107362 states and 116655 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:57,879 INFO L93 Difference]: Finished difference Result 278752 states and 303416 transitions. [2021-12-15 09:06:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:57,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 430 [2021-12-15 09:06:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:58,090 INFO L225 Difference]: With dead ends: 278752 [2021-12-15 09:06:58,090 INFO L226 Difference]: Without dead ends: 173424 [2021-12-15 09:06:58,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:58,179 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 274 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:58,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 868 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]