./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label16.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8b5d267cd1e473b445c52ec06f60f3c8a73f12a2c5a7f8cdb18f8745b90aa156 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:43:10,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:43:10,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:43:10,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:43:10,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:43:10,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:43:10,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:43:10,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:43:10,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:43:10,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:43:10,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:43:10,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:43:10,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:43:10,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:43:10,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:43:10,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:43:10,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:43:10,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:43:10,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:43:10,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:43:10,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:43:10,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:43:10,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:43:10,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:43:10,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:43:10,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:43:10,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:43:10,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:43:10,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:43:10,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:43:10,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:43:10,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:43:10,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:43:10,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:43:10,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:43:10,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:43:10,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:43:10,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:43:10,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:43:10,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:43:10,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:43:10,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:43:10,626 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:43:10,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:43:10,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:43:10,627 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:43:10,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:43:10,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:43:10,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:43:10,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:43:10,629 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:43:10,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:43:10,629 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:43:10,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:43:10,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:43:10,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:43:10,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:43:10,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:43:10,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:43:10,630 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:43:10,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:43:10,631 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:43:10,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:43:10,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:43:10,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:43:10,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:43:10,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:43:10,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:43:10,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:43:10,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:43:10,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:43:10,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:43:10,632 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:43:10,633 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:43:10,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:43:10,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:43:10,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b5d267cd1e473b445c52ec06f60f3c8a73f12a2c5a7f8cdb18f8745b90aa156 [2021-12-15 09:43:10,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:43:10,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:43:10,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:43:10,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:43:10,818 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:43:10,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2021-12-15 09:43:10,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e95a4c0/f3ff1a1398e54ccf86805dcacf112279/FLAG8d116b923 [2021-12-15 09:43:11,477 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:43:11,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2021-12-15 09:43:11,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e95a4c0/f3ff1a1398e54ccf86805dcacf112279/FLAG8d116b923 [2021-12-15 09:43:11,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e95a4c0/f3ff1a1398e54ccf86805dcacf112279 [2021-12-15 09:43:11,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:43:11,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:43:11,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:43:11,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:43:11,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:43:11,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:43:11" (1/1) ... [2021-12-15 09:43:11,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261aa921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:11, skipping insertion in model container [2021-12-15 09:43:11,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:43:11" (1/1) ... [2021-12-15 09:43:11,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:43:12,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:43:12,208 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2021-12-15 09:43:12,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:43:12,820 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:43:12,841 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2021-12-15 09:43:13,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:43:13,156 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:43:13,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13 WrapperNode [2021-12-15 09:43:13,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:43:13,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:43:13,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:43:13,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:43:13,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13" (1/1) ... [2021-12-15 09:43:13,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13" (1/1) ... [2021-12-15 09:43:13,639 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 09:43:13,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:43:13,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:43:13,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:43:13,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:43:13,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13" (1/1) ... [2021-12-15 09:43:13,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13" (1/1) ... [2021-12-15 09:43:13,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13" (1/1) ... [2021-12-15 09:43:13,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13" (1/1) ... [2021-12-15 09:43:14,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13" (1/1) ... [2021-12-15 09:43:14,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13" (1/1) ... [2021-12-15 09:43:14,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13" (1/1) ... [2021-12-15 09:43:14,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:43:14,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:43:14,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:43:14,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:43:14,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13" (1/1) ... [2021-12-15 09:43:14,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:43:14,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:43:14,279 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 09:43:14,295 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 09:43:14,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:43:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:43:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:43:14,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:43:14,354 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:43:14,355 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:43:17,689 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:43:17,702 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:43:17,702 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:43:17,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:43:17 BoogieIcfgContainer [2021-12-15 09:43:17,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:43:17,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:43:17,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:43:17,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:43:17,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:43:11" (1/3) ... [2021-12-15 09:43:17,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26dfc3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:43:17, skipping insertion in model container [2021-12-15 09:43:17,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:13" (2/3) ... [2021-12-15 09:43:17,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26dfc3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:43:17, skipping insertion in model container [2021-12-15 09:43:17,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:43:17" (3/3) ... [2021-12-15 09:43:17,711 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label16.c [2021-12-15 09:43:17,714 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:43:17,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:43:17,750 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:43:17,754 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 09:43:17,754 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:43:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 09:43:17,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:17,780 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] [2021-12-15 09:43:17,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2021-12-15 09:43:17,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:17,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909167870] [2021-12-15 09:43:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:17,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:17,912 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 09:43:17,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:17,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909167870] [2021-12-15 09:43:17,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909167870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:17,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:17,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:43:17,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116800225] [2021-12-15 09:43:17,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:17,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:17,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:17,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:17,940 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 09:43:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:21,324 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2021-12-15 09:43:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:21,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-12-15 09:43:21,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:21,344 INFO L225 Difference]: With dead ends: 3147 [2021-12-15 09:43:21,344 INFO L226 Difference]: Without dead ends: 1964 [2021-12-15 09:43:21,350 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 09:43:21,353 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1157 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:21,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 09:43:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-12-15 09:43:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2021-12-15 09:43:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states 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 09:43:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2021-12-15 09:43:21,480 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 22 [2021-12-15 09:43:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:21,481 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2021-12-15 09:43:21,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 09:43:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2021-12-15 09:43:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 09:43:21,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:21,486 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:43:21,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:43:21,487 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:21,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:21,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1950578781, now seen corresponding path program 1 times [2021-12-15 09:43:21,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:21,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964289573] [2021-12-15 09:43:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:21,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:21,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:21,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964289573] [2021-12-15 09:43:21,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964289573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:21,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:21,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:43:21,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771396781] [2021-12-15 09:43:21,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:21,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:21,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:21,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:21,615 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 09:43:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:24,759 INFO L93 Difference]: Finished difference Result 5540 states and 9221 transitions. [2021-12-15 09:43:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:24,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-15 09:43:24,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:24,777 INFO L225 Difference]: With dead ends: 5540 [2021-12-15 09:43:24,777 INFO L226 Difference]: Without dead ends: 3591 [2021-12-15 09:43:24,780 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 09:43:24,781 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 923 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:24,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:43:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2021-12-15 09:43:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 3581. [2021-12-15 09:43:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states 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 09:43:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions. [2021-12-15 09:43:24,831 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 93 [2021-12-15 09:43:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:24,833 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions. [2021-12-15 09:43:24,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 09:43:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions. [2021-12-15 09:43:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 09:43:24,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:24,839 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:43:24,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:43:24,841 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:24,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1652293152, now seen corresponding path program 1 times [2021-12-15 09:43:24,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:24,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821050780] [2021-12-15 09:43:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:24,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:24,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:24,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821050780] [2021-12-15 09:43:24,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821050780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:24,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:24,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:43:24,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848812021] [2021-12-15 09:43:24,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:24,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:24,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:24,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:24,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:24,905 INFO L87 Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:27,974 INFO L93 Difference]: Finished difference Result 10352 states and 15625 transitions. [2021-12-15 09:43:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:27,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-15 09:43:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:27,994 INFO L225 Difference]: With dead ends: 10352 [2021-12-15 09:43:27,994 INFO L226 Difference]: Without dead ends: 6773 [2021-12-15 09:43:28,000 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 09:43:28,001 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 785 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:28,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1172 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:43:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-12-15 09:43:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749. [2021-12-15 09:43:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 1.3252815649081209) internal successors, (8943), 6748 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states 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 09:43:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8943 transitions. [2021-12-15 09:43:28,114 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8943 transitions. Word has length 107 [2021-12-15 09:43:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:28,115 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 8943 transitions. [2021-12-15 09:43:28,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8943 transitions. [2021-12-15 09:43:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-15 09:43:28,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:28,121 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:43:28,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:43:28,122 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:28,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1904945754, now seen corresponding path program 1 times [2021-12-15 09:43:28,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:28,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646196175] [2021-12-15 09:43:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:28,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:28,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:28,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646196175] [2021-12-15 09:43:28,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646196175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:28,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:28,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:43:28,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688272511] [2021-12-15 09:43:28,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:28,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:28,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:28,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:28,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:28,252 INFO L87 Difference]: Start difference. First operand 6749 states and 8943 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 09:43:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:31,335 INFO L93 Difference]: Finished difference Result 19871 states and 26319 transitions. [2021-12-15 09:43:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-15 09:43:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:31,373 INFO L225 Difference]: With dead ends: 19871 [2021-12-15 09:43:31,373 INFO L226 Difference]: Without dead ends: 13124 [2021-12-15 09:43:31,382 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 09:43:31,383 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 899 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:31,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 609 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:43:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13124 states. [2021-12-15 09:43:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13124 to 13114. [2021-12-15 09:43:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13114 states, 13113 states have (on average 1.2755281018836269) internal successors, (16726), 13113 states have internal predecessors, (16726), 0 states have call successors, (0), 0 states 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 09:43:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13114 states to 13114 states and 16726 transitions. [2021-12-15 09:43:31,559 INFO L78 Accepts]: Start accepts. Automaton has 13114 states and 16726 transitions. Word has length 136 [2021-12-15 09:43:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:31,560 INFO L470 AbstractCegarLoop]: Abstraction has 13114 states and 16726 transitions. [2021-12-15 09:43:31,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 09:43:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 13114 states and 16726 transitions. [2021-12-15 09:43:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-15 09:43:31,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:31,563 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:43:31,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:43:31,564 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:31,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1690863616, now seen corresponding path program 1 times [2021-12-15 09:43:31,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:31,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464840420] [2021-12-15 09:43:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:31,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:31,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:31,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464840420] [2021-12-15 09:43:31,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464840420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:31,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:31,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:43:31,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381517689] [2021-12-15 09:43:31,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:31,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:43:31,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:31,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:43:31,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:43:31,709 INFO L87 Difference]: Start difference. First operand 13114 states and 16726 transitions. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:37,179 INFO L93 Difference]: Finished difference Result 45404 states and 59035 transitions. [2021-12-15 09:43:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:43:37,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-12-15 09:43:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:37,246 INFO L225 Difference]: With dead ends: 45404 [2021-12-15 09:43:37,247 INFO L226 Difference]: Without dead ends: 33079 [2021-12-15 09:43:37,259 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 09:43:37,261 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 1621 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 6114 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 6745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 6114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:37,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1621 Valid, 1118 Invalid, 6745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 6114 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-15 09:43:37,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33079 states. [2021-12-15 09:43:37,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33079 to 32857. [2021-12-15 09:43:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32857 states, 32856 states have (on average 1.2321341611882153) internal successors, (40483), 32856 states have internal predecessors, (40483), 0 states have call successors, (0), 0 states 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 09:43:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32857 states to 32857 states and 40483 transitions. [2021-12-15 09:43:37,640 INFO L78 Accepts]: Start accepts. Automaton has 32857 states and 40483 transitions. Word has length 219 [2021-12-15 09:43:37,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:37,641 INFO L470 AbstractCegarLoop]: Abstraction has 32857 states and 40483 transitions. [2021-12-15 09:43:37,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand 32857 states and 40483 transitions. [2021-12-15 09:43:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-15 09:43:37,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:37,647 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:43:37,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:43:37,647 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:37,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:37,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1919619804, now seen corresponding path program 1 times [2021-12-15 09:43:37,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:37,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809600653] [2021-12-15 09:43:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:37,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 09:43:37,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:37,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809600653] [2021-12-15 09:43:37,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809600653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:37,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:37,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:43:37,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702145719] [2021-12-15 09:43:37,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:37,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:37,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:37,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:37,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:37,734 INFO L87 Difference]: Start difference. First operand 32857 states and 40483 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 09:43:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:40,813 INFO L93 Difference]: Finished difference Result 70561 states and 86815 transitions. [2021-12-15 09:43:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:40,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 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 223 [2021-12-15 09:43:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:40,855 INFO L225 Difference]: With dead ends: 70561 [2021-12-15 09:43:40,856 INFO L226 Difference]: Without dead ends: 38493 [2021-12-15 09:43:40,878 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 09:43:40,880 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 772 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2827 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:40,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 889 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2827 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:43:40,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38493 states. [2021-12-15 09:43:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38493 to 38449. [2021-12-15 09:43:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38449 states, 38448 states have (on average 1.2217800665834373) internal successors, (46975), 38448 states have internal predecessors, (46975), 0 states have call successors, (0), 0 states 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 09:43:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38449 states to 38449 states and 46975 transitions. [2021-12-15 09:43:41,330 INFO L78 Accepts]: Start accepts. Automaton has 38449 states and 46975 transitions. Word has length 223 [2021-12-15 09:43:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:41,330 INFO L470 AbstractCegarLoop]: Abstraction has 38449 states and 46975 transitions. [2021-12-15 09:43:41,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 09:43:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 38449 states and 46975 transitions. [2021-12-15 09:43:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-15 09:43:41,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:41,334 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:43:41,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:43:41,334 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash -110228447, now seen corresponding path program 1 times [2021-12-15 09:43:41,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:41,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498264579] [2021-12-15 09:43:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:41,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 09:43:41,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:41,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498264579] [2021-12-15 09:43:41,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498264579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:41,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:41,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:43:41,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300078538] [2021-12-15 09:43:41,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:41,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:41,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:41,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:41,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:41,410 INFO L87 Difference]: Start difference. First operand 38449 states and 46975 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:43,907 INFO L93 Difference]: Finished difference Result 76109 states and 93146 transitions. [2021-12-15 09:43:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:43,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-12-15 09:43:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:43,963 INFO L225 Difference]: With dead ends: 76109 [2021-12-15 09:43:43,963 INFO L226 Difference]: Without dead ends: 38449 [2021-12-15 09:43:43,988 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 09:43:43,988 INFO L933 BasicCegarLoop]: 1084 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:43,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1213 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:43:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38449 states. [2021-12-15 09:43:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38449 to 38449. [2021-12-15 09:43:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38449 states, 38448 states have (on average 1.2216500208073242) internal successors, (46970), 38448 states have internal predecessors, (46970), 0 states have call successors, (0), 0 states 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 09:43:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38449 states to 38449 states and 46970 transitions. [2021-12-15 09:43:44,441 INFO L78 Accepts]: Start accepts. Automaton has 38449 states and 46970 transitions. Word has length 233 [2021-12-15 09:43:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:44,441 INFO L470 AbstractCegarLoop]: Abstraction has 38449 states and 46970 transitions. [2021-12-15 09:43:44,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 38449 states and 46970 transitions. [2021-12-15 09:43:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-15 09:43:44,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:44,444 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:43:44,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:43:44,444 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash -257939733, now seen corresponding path program 1 times [2021-12-15 09:43:44,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:44,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561663042] [2021-12-15 09:43:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:44,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:44,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:44,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561663042] [2021-12-15 09:43:44,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561663042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:44,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:44,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:43:44,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856054424] [2021-12-15 09:43:44,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:44,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:44,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:44,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:44,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:44,522 INFO L87 Difference]: Start difference. First operand 38449 states and 46970 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:47,065 INFO L93 Difference]: Finished difference Result 75898 states and 92848 transitions. [2021-12-15 09:43:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:47,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-12-15 09:43:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:47,111 INFO L225 Difference]: With dead ends: 75898 [2021-12-15 09:43:47,111 INFO L226 Difference]: Without dead ends: 38238 [2021-12-15 09:43:47,136 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 09:43:47,137 INFO L933 BasicCegarLoop]: 1513 mSDtfsCounter, 1038 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 2945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:47,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1657 Invalid, 2945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:43:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38238 states. [2021-12-15 09:43:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38238 to 38227. [2021-12-15 09:43:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38227 states, 38226 states have (on average 1.1489823680217652) internal successors, (43921), 38226 states have internal predecessors, (43921), 0 states have call successors, (0), 0 states 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 09:43:47,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38227 states to 38227 states and 43921 transitions. [2021-12-15 09:43:47,492 INFO L78 Accepts]: Start accepts. Automaton has 38227 states and 43921 transitions. Word has length 236 [2021-12-15 09:43:47,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:47,492 INFO L470 AbstractCegarLoop]: Abstraction has 38227 states and 43921 transitions. [2021-12-15 09:43:47,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:47,493 INFO L276 IsEmpty]: Start isEmpty. Operand 38227 states and 43921 transitions. [2021-12-15 09:43:47,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-15 09:43:47,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:47,495 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:43:47,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:43:47,495 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:47,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash 879999670, now seen corresponding path program 1 times [2021-12-15 09:43:47,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:47,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040382499] [2021-12-15 09:43:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:47,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:47,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040382499] [2021-12-15 09:43:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040382499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:47,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:47,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:43:47,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033403667] [2021-12-15 09:43:47,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:47,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:47,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:47,575 INFO L87 Difference]: Start difference. First operand 38227 states and 43921 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 09:43:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:50,571 INFO L93 Difference]: Finished difference Result 92994 states and 108402 transitions. [2021-12-15 09:43:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:50,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 240 [2021-12-15 09:43:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:50,638 INFO L225 Difference]: With dead ends: 92994 [2021-12-15 09:43:50,638 INFO L226 Difference]: Without dead ends: 55556 [2021-12-15 09:43:50,663 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 09:43:50,664 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 811 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:50,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1015 Invalid, 3296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:43:50,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55556 states. [2021-12-15 09:43:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55556 to 55546. [2021-12-15 09:43:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55546 states, 55545 states have (on average 1.1378161850751642) internal successors, (63200), 55545 states have internal predecessors, (63200), 0 states have call successors, (0), 0 states 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 09:43:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55546 states to 55546 states and 63200 transitions. [2021-12-15 09:43:51,165 INFO L78 Accepts]: Start accepts. Automaton has 55546 states and 63200 transitions. Word has length 240 [2021-12-15 09:43:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:51,165 INFO L470 AbstractCegarLoop]: Abstraction has 55546 states and 63200 transitions. [2021-12-15 09:43:51,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 09:43:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 55546 states and 63200 transitions. [2021-12-15 09:43:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-15 09:43:51,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:51,168 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:43:51,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:43:51,168 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1356626717, now seen corresponding path program 1 times [2021-12-15 09:43:51,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:51,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182487952] [2021-12-15 09:43:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:51,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 09:43:51,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:51,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182487952] [2021-12-15 09:43:51,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182487952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:51,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:51,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:43:51,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048454555] [2021-12-15 09:43:51,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:51,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:51,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:51,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:51,232 INFO L87 Difference]: Start difference. First operand 55546 states and 63200 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 09:43:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:54,266 INFO L93 Difference]: Finished difference Result 144918 states and 166182 transitions. [2021-12-15 09:43:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:54,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 252 [2021-12-15 09:43:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:54,366 INFO L225 Difference]: With dead ends: 144918 [2021-12-15 09:43:54,366 INFO L226 Difference]: Without dead ends: 88584 [2021-12-15 09:43:54,402 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 09:43:54,403 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 818 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 3215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:54,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 1041 Invalid, 3215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:43:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88584 states. [2021-12-15 09:43:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88584 to 83064. [2021-12-15 09:43:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83064 states, 83063 states have (on average 1.1130587626259587) internal successors, (92454), 83063 states have internal predecessors, (92454), 0 states have call successors, (0), 0 states 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 09:43:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83064 states to 83064 states and 92454 transitions. [2021-12-15 09:43:55,168 INFO L78 Accepts]: Start accepts. Automaton has 83064 states and 92454 transitions. Word has length 252 [2021-12-15 09:43:55,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:55,168 INFO L470 AbstractCegarLoop]: Abstraction has 83064 states and 92454 transitions. [2021-12-15 09:43:55,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 09:43:55,168 INFO L276 IsEmpty]: Start isEmpty. Operand 83064 states and 92454 transitions. [2021-12-15 09:43:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-15 09:43:55,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:55,171 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:43:55,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:43:55,171 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:55,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1734427868, now seen corresponding path program 1 times [2021-12-15 09:43:55,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:55,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663406444] [2021-12-15 09:43:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:55,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 09:43:55,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:55,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663406444] [2021-12-15 09:43:55,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663406444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:55,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:55,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:43:55,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105001155] [2021-12-15 09:43:55,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:55,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:43:55,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:55,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:43:55,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:43:55,632 INFO L87 Difference]: Start difference. First operand 83064 states and 92454 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:01,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:01,796 INFO L93 Difference]: Finished difference Result 223008 states and 249043 transitions. [2021-12-15 09:44:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:44:01,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2021-12-15 09:44:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:01,957 INFO L225 Difference]: With dead ends: 223008 [2021-12-15 09:44:01,957 INFO L226 Difference]: Without dead ends: 139946 [2021-12-15 09:44:01,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:01,990 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 1710 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 6665 mSolverCounterSat, 1020 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 7685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1020 IncrementalHoareTripleChecker+Valid, 6665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:01,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1710 Valid, 831 Invalid, 7685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1020 Valid, 6665 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-15 09:44:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139946 states. [2021-12-15 09:44:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139946 to 139025. [2021-12-15 09:44:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139025 states, 139024 states have (on average 1.1072764414777305) internal successors, (153938), 139024 states have internal predecessors, (153938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139025 states to 139025 states and 153938 transitions. [2021-12-15 09:44:03,749 INFO L78 Accepts]: Start accepts. Automaton has 139025 states and 153938 transitions. Word has length 310 [2021-12-15 09:44:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:03,749 INFO L470 AbstractCegarLoop]: Abstraction has 139025 states and 153938 transitions. [2021-12-15 09:44:03,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 139025 states and 153938 transitions. [2021-12-15 09:44:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-15 09:44:03,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:03,752 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:03,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:44:03,753 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:03,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:03,753 INFO L85 PathProgramCache]: Analyzing trace with hash -297594191, now seen corresponding path program 1 times [2021-12-15 09:44:03,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:03,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838306095] [2021-12-15 09:44:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:03,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 211 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 09:44:03,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838306095] [2021-12-15 09:44:03,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838306095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:44:03,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114516086] [2021-12-15 09:44:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:03,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:44:03,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:44:03,966 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 09:44:03,966 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 09:44:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:44:04,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:44:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-15 09:44:04,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:44:04,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114516086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:04,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:44:04,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:44:04,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593447851] [2021-12-15 09:44:04,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:04,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:04,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:44:04,606 INFO L87 Difference]: Start difference. First operand 139025 states and 153938 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:07,735 INFO L93 Difference]: Finished difference Result 271747 states and 301029 transitions. [2021-12-15 09:44:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:07,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 348 [2021-12-15 09:44:07,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:07,913 INFO L225 Difference]: With dead ends: 271747 [2021-12-15 09:44:07,913 INFO L226 Difference]: Without dead ends: 136661 [2021-12-15 09:44:07,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:44:07,959 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1113 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:07,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 1421 Invalid, 2890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 2447 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:44:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136661 states. [2021-12-15 09:44:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136661 to 136660. [2021-12-15 09:44:09,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136660 states, 136659 states have (on average 1.0820363093539394) internal successors, (147870), 136659 states have internal predecessors, (147870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136660 states to 136660 states and 147870 transitions. [2021-12-15 09:44:09,625 INFO L78 Accepts]: Start accepts. Automaton has 136660 states and 147870 transitions. Word has length 348 [2021-12-15 09:44:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:09,626 INFO L470 AbstractCegarLoop]: Abstraction has 136660 states and 147870 transitions. [2021-12-15 09:44:09,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 136660 states and 147870 transitions. [2021-12-15 09:44:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-12-15 09:44:09,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:09,630 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:09,648 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 09:44:09,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 09:44:09,846 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:09,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:09,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2022662319, now seen corresponding path program 1 times [2021-12-15 09:44:09,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:09,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108803824] [2021-12-15 09:44:09,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:09,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-15 09:44:09,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:09,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108803824] [2021-12-15 09:44:09,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108803824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:09,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:09,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:09,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135218652] [2021-12-15 09:44:09,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:09,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:09,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:09,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:09,940 INFO L87 Difference]: Start difference. First operand 136660 states and 147870 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)