./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label59.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_label59.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 e95469d39d3368d14177394b02d3829b8d37dd10304149f6e91cf64fc01c6cbc --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:46:11,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:46:11,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:46:11,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:46:11,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:46:11,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:46:11,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:46:11,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:46:11,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:46:11,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:46:11,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:46:11,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:46:11,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:46:11,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:46:11,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:46:11,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:46:11,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:46:11,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:46:11,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:46:11,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:46:11,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:46:11,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:46:11,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:46:11,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:46:11,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:46:11,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:46:11,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:46:11,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:46:11,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:46:11,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:46:11,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:46:11,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:46:11,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:46:11,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:46:11,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:46:11,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:46:11,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:46:11,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:46:11,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:46:11,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:46:11,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:46:11,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:46:11,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:46:11,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:46:11,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:46:11,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:46:11,600 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:46:11,600 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:46:11,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:46:11,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:46:11,601 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:46:11,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:46:11,602 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:46:11,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:46:11,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:46:11,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:46:11,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:46:11,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:46:11,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:46:11,604 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:46:11,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:46:11,604 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:46:11,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:46:11,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:46:11,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:46:11,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:46:11,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:46:11,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:46:11,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:46:11,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:46:11,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:46:11,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:46:11,607 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:46:11,608 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:46:11,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:46:11,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:46:11,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e95469d39d3368d14177394b02d3829b8d37dd10304149f6e91cf64fc01c6cbc [2021-12-15 09:46:11,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:46:11,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:46:11,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:46:11,843 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:46:11,847 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:46:11,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label59.c [2021-12-15 09:46:11,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03464086/3afb098797f141c5a4deeb2776d15833/FLAG924517acb [2021-12-15 09:46:12,615 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:46:12,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label59.c [2021-12-15 09:46:12,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03464086/3afb098797f141c5a4deeb2776d15833/FLAG924517acb [2021-12-15 09:46:12,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03464086/3afb098797f141c5a4deeb2776d15833 [2021-12-15 09:46:12,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:46:12,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:46:12,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:46:12,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:46:12,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:46:12,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:46:12" (1/1) ... [2021-12-15 09:46:12,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@325b7d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:12, skipping insertion in model container [2021-12-15 09:46:12,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:46:12" (1/1) ... [2021-12-15 09:46:12,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:46:12,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:46:13,156 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_label59.c[6607,6620] [2021-12-15 09:46:13,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:46:14,002 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:46:14,041 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_label59.c[6607,6620] [2021-12-15 09:46:14,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:46:14,472 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:46:14,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14 WrapperNode [2021-12-15 09:46:14,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:46:14,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:46:14,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:46:14,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:46:14,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14" (1/1) ... [2021-12-15 09:46:14,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14" (1/1) ... [2021-12-15 09:46:15,090 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 09:46:15,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:46:15,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:46:15,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:46:15,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:46:15,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14" (1/1) ... [2021-12-15 09:46:15,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14" (1/1) ... [2021-12-15 09:46:15,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14" (1/1) ... [2021-12-15 09:46:15,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14" (1/1) ... [2021-12-15 09:46:15,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14" (1/1) ... [2021-12-15 09:46:15,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14" (1/1) ... [2021-12-15 09:46:15,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14" (1/1) ... [2021-12-15 09:46:15,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:46:15,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:46:15,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:46:15,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:46:15,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14" (1/1) ... [2021-12-15 09:46:15,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:46:15,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:46:15,789 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 09:46:15,813 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 09:46:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:46:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:46:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:46:15,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:46:15,898 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:46:15,900 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:46:19,905 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:46:19,925 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:46:19,936 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:46:19,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:46:19 BoogieIcfgContainer [2021-12-15 09:46:19,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:46:19,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:46:19,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:46:19,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:46:19,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:46:12" (1/3) ... [2021-12-15 09:46:19,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3197171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:46:19, skipping insertion in model container [2021-12-15 09:46:19,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:46:14" (2/3) ... [2021-12-15 09:46:19,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3197171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:46:19, skipping insertion in model container [2021-12-15 09:46:19,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:46:19" (3/3) ... [2021-12-15 09:46:19,963 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label59.c [2021-12-15 09:46:19,967 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:46:19,968 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:46:20,048 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:46:20,054 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 09:46:20,055 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:46:20,089 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 09:46:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-15 09:46:20,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:20,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:20,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:20,103 INFO L85 PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times [2021-12-15 09:46:20,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:20,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899269334] [2021-12-15 09:46:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:20,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:20,353 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 09:46:20,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:20,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899269334] [2021-12-15 09:46:20,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899269334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:20,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:20,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:46:20,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461183375] [2021-12-15 09:46:20,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:20,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:20,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:20,401 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 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 09:46:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:24,986 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-12-15 09:46:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-15 09:46:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:25,012 INFO L225 Difference]: With dead ends: 3160 [2021-12-15 09:46:25,013 INFO L226 Difference]: Without dead ends: 1983 [2021-12-15 09:46:25,023 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 09:46:25,030 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1057 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:25,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-15 09:46:25,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-12-15 09:46:25,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-12-15 09:46:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states 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 09:46:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-12-15 09:46:25,166 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 46 [2021-12-15 09:46:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:25,167 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-12-15 09:46:25,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 09:46:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-12-15 09:46:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 09:46:25,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:25,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 09:46:25,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:46:25,177 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:25,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:25,179 INFO L85 PathProgramCache]: Analyzing trace with hash -928496590, now seen corresponding path program 1 times [2021-12-15 09:46:25,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:25,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089080740] [2021-12-15 09:46:25,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:25,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:46:25,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:25,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089080740] [2021-12-15 09:46:25,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089080740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:25,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:25,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:46:25,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354163440] [2021-12-15 09:46:25,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:25,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:46:25,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:25,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:46:25,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:46:25,319 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 09:46:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:30,901 INFO L93 Difference]: Finished difference Result 6254 states and 11380 transitions. [2021-12-15 09:46:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:46:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-12-15 09:46:30,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:30,922 INFO L225 Difference]: With dead ends: 6254 [2021-12-15 09:46:30,922 INFO L226 Difference]: Without dead ends: 4326 [2021-12-15 09:46:30,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:46:30,926 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 2618 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2618 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 5590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1434 IncrementalHoareTripleChecker+Valid, 4156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:30,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2618 Valid, 1036 Invalid, 5590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 4156 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-15 09:46:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-12-15 09:46:30,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4323. [2021-12-15 09:46:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4323 states, 4322 states have (on average 1.529615918556224) internal successors, (6611), 4322 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states 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 09:46:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4323 states to 4323 states and 6611 transitions. [2021-12-15 09:46:31,012 INFO L78 Accepts]: Start accepts. Automaton has 4323 states and 6611 transitions. Word has length 111 [2021-12-15 09:46:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:31,012 INFO L470 AbstractCegarLoop]: Abstraction has 4323 states and 6611 transitions. [2021-12-15 09:46:31,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 09:46:31,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4323 states and 6611 transitions. [2021-12-15 09:46:31,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-15 09:46:31,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:31,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:46:31,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:46:31,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash -339079179, now seen corresponding path program 1 times [2021-12-15 09:46:31,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:31,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974989650] [2021-12-15 09:46:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:31,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:46:31,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974989650] [2021-12-15 09:46:31,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974989650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:31,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:31,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:46:31,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181793905] [2021-12-15 09:46:31,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:31,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:31,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:31,173 INFO L87 Difference]: Start difference. First operand 4323 states and 6611 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:33,744 INFO L93 Difference]: Finished difference Result 7844 states and 12416 transitions. [2021-12-15 09:46:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-12-15 09:46:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:33,759 INFO L225 Difference]: With dead ends: 7844 [2021-12-15 09:46:33,760 INFO L226 Difference]: Without dead ends: 4310 [2021-12-15 09:46:33,765 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 09:46:33,766 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 1086 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:33,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 1675 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:46:33,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2021-12-15 09:46:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4307. [2021-12-15 09:46:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4307 states, 4306 states have (on average 1.361356247097074) internal successors, (5862), 4306 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states 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 09:46:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 5862 transitions. [2021-12-15 09:46:33,896 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 5862 transitions. Word has length 171 [2021-12-15 09:46:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:33,899 INFO L470 AbstractCegarLoop]: Abstraction has 4307 states and 5862 transitions. [2021-12-15 09:46:33,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:33,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 5862 transitions. [2021-12-15 09:46:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-15 09:46:33,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:33,904 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:33,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:46:33,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:33,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1790168010, now seen corresponding path program 1 times [2021-12-15 09:46:33,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:33,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887289336] [2021-12-15 09:46:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:33,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:46:34,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:34,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887289336] [2021-12-15 09:46:34,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887289336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:34,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:34,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:46:34,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877226489] [2021-12-15 09:46:34,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:34,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:34,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:34,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:34,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:34,126 INFO L87 Difference]: Start difference. First operand 4307 states and 5862 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 09:46:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:37,214 INFO L93 Difference]: Finished difference Result 11006 states and 15563 transitions. [2021-12-15 09:46:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:37,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 234 [2021-12-15 09:46:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:37,238 INFO L225 Difference]: With dead ends: 11006 [2021-12-15 09:46:37,239 INFO L226 Difference]: Without dead ends: 7488 [2021-12-15 09:46:37,247 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 09:46:37,248 INFO L933 BasicCegarLoop]: 1504 mSDtfsCounter, 936 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 3452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:37,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 1555 Invalid, 3452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:46:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7488 states. [2021-12-15 09:46:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7488 to 7465. [2021-12-15 09:46:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7465 states, 7464 states have (on average 1.3766077170418007) internal successors, (10275), 7464 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states 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 09:46:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7465 states to 7465 states and 10275 transitions. [2021-12-15 09:46:37,385 INFO L78 Accepts]: Start accepts. Automaton has 7465 states and 10275 transitions. Word has length 234 [2021-12-15 09:46:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:37,386 INFO L470 AbstractCegarLoop]: Abstraction has 7465 states and 10275 transitions. [2021-12-15 09:46:37,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 09:46:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 7465 states and 10275 transitions. [2021-12-15 09:46:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-15 09:46:37,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:37,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:37,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:46:37,390 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:37,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:37,391 INFO L85 PathProgramCache]: Analyzing trace with hash 528389062, now seen corresponding path program 1 times [2021-12-15 09:46:37,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:37,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483986300] [2021-12-15 09:46:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:37,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-15 09:46:37,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:37,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483986300] [2021-12-15 09:46:37,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483986300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:37,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:37,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:46:37,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905274986] [2021-12-15 09:46:37,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:37,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:37,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:37,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:37,535 INFO L87 Difference]: Start difference. First operand 7465 states and 10275 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 09:46:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:40,888 INFO L93 Difference]: Finished difference Result 20464 states and 28783 transitions. [2021-12-15 09:46:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:40,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 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 237 [2021-12-15 09:46:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:40,922 INFO L225 Difference]: With dead ends: 20464 [2021-12-15 09:46:40,922 INFO L226 Difference]: Without dead ends: 13788 [2021-12-15 09:46:40,932 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 09:46:40,935 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 926 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:40,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 829 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 09:46:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13788 states. [2021-12-15 09:46:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13788 to 13777. [2021-12-15 09:46:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.2952961672473868) internal successors, (17844), 13776 states have internal predecessors, (17844), 0 states have call successors, (0), 0 states 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 09:46:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 17844 transitions. [2021-12-15 09:46:41,144 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 17844 transitions. Word has length 237 [2021-12-15 09:46:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:41,145 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 17844 transitions. [2021-12-15 09:46:41,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 09:46:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 17844 transitions. [2021-12-15 09:46:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-15 09:46:41,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:41,154 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:46:41,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:46:41,156 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:41,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1541403827, now seen corresponding path program 1 times [2021-12-15 09:46:41,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:41,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500837980] [2021-12-15 09:46:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:41,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:46:41,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:41,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500837980] [2021-12-15 09:46:41,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500837980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:41,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:41,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:46:41,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893785817] [2021-12-15 09:46:41,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:41,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:41,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:41,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:41,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:41,290 INFO L87 Difference]: Start difference. First operand 13777 states and 17844 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:44,596 INFO L93 Difference]: Finished difference Result 33096 states and 43091 transitions. [2021-12-15 09:46:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:44,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-12-15 09:46:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:44,632 INFO L225 Difference]: With dead ends: 33096 [2021-12-15 09:46:44,632 INFO L226 Difference]: Without dead ends: 20108 [2021-12-15 09:46:44,643 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 09:46:44,644 INFO L933 BasicCegarLoop]: 1830 mSDtfsCounter, 749 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 3209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:44,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1970 Invalid, 3209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 2587 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 09:46:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20108 states. [2021-12-15 09:46:44,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20108 to 20078. [2021-12-15 09:46:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20078 states, 20077 states have (on average 1.2317577327289935) internal successors, (24730), 20077 states have internal predecessors, (24730), 0 states have call successors, (0), 0 states 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 09:46:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20078 states to 20078 states and 24730 transitions. [2021-12-15 09:46:44,918 INFO L78 Accepts]: Start accepts. Automaton has 20078 states and 24730 transitions. Word has length 258 [2021-12-15 09:46:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:44,919 INFO L470 AbstractCegarLoop]: Abstraction has 20078 states and 24730 transitions. [2021-12-15 09:46:44,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 20078 states and 24730 transitions. [2021-12-15 09:46:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-12-15 09:46:44,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:44,923 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:44,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:46:44,924 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:44,925 INFO L85 PathProgramCache]: Analyzing trace with hash -824584201, now seen corresponding path program 1 times [2021-12-15 09:46:44,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:44,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78692112] [2021-12-15 09:46:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:44,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 90 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:46:45,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:45,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78692112] [2021-12-15 09:46:45,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78692112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:46:45,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2537977] [2021-12-15 09:46:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:45,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:46:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:46:45,193 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 09:46:45,224 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 09:46:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:45,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:46:45,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:46:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 09:46:45,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:46:45,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2537977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:45,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:46:45,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 09:46:45,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641132501] [2021-12-15 09:46:45,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:45,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:45,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:45,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:45,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:46:45,865 INFO L87 Difference]: Start difference. First operand 20078 states and 24730 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 09:46:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:49,222 INFO L93 Difference]: Finished difference Result 57468 states and 71270 transitions. [2021-12-15 09:46:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2021-12-15 09:46:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:49,294 INFO L225 Difference]: With dead ends: 57468 [2021-12-15 09:46:49,295 INFO L226 Difference]: Without dead ends: 38179 [2021-12-15 09:46:49,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:46:49,313 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 983 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2573 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 2573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:49,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1724 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 2573 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:46:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38179 states. [2021-12-15 09:46:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38179 to 34243. [2021-12-15 09:46:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34243 states, 34242 states have (on average 1.2130424624729863) internal successors, (41537), 34242 states have internal predecessors, (41537), 0 states have call successors, (0), 0 states 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 09:46:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34243 states to 34243 states and 41537 transitions. [2021-12-15 09:46:49,757 INFO L78 Accepts]: Start accepts. Automaton has 34243 states and 41537 transitions. Word has length 287 [2021-12-15 09:46:49,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:49,758 INFO L470 AbstractCegarLoop]: Abstraction has 34243 states and 41537 transitions. [2021-12-15 09:46:49,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 09:46:49,758 INFO L276 IsEmpty]: Start isEmpty. Operand 34243 states and 41537 transitions. [2021-12-15 09:46:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-12-15 09:46:49,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:49,763 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:49,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:46:49,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:46:49,980 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1943117730, now seen corresponding path program 1 times [2021-12-15 09:46:49,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:49,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699112735] [2021-12-15 09:46:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:49,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 131 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:46:50,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:50,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699112735] [2021-12-15 09:46:50,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699112735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:46:50,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792332538] [2021-12-15 09:46:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:50,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:46:50,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:46:50,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:46:50,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:46:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:46:50,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:46:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 09:46:50,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:46:50,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792332538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:50,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:46:50,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 09:46:50,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454103641] [2021-12-15 09:46:50,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:50,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:50,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:46:50,853 INFO L87 Difference]: Start difference. First operand 34243 states and 41537 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 09:46:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:53,853 INFO L93 Difference]: Finished difference Result 71624 states and 86793 transitions. [2021-12-15 09:46:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 288 [2021-12-15 09:46:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:53,905 INFO L225 Difference]: With dead ends: 71624 [2021-12-15 09:46:53,905 INFO L226 Difference]: Without dead ends: 36591 [2021-12-15 09:46:53,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:46:53,931 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 854 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:53,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 944 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 2297 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:46:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36591 states. [2021-12-15 09:46:54,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36591 to 35013. [2021-12-15 09:46:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35013 states, 35012 states have (on average 1.132725922540843) internal successors, (39659), 35012 states have internal predecessors, (39659), 0 states have call successors, (0), 0 states 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 09:46:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35013 states to 35013 states and 39659 transitions. [2021-12-15 09:46:54,342 INFO L78 Accepts]: Start accepts. Automaton has 35013 states and 39659 transitions. Word has length 288 [2021-12-15 09:46:54,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:54,343 INFO L470 AbstractCegarLoop]: Abstraction has 35013 states and 39659 transitions. [2021-12-15 09:46:54,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 09:46:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 35013 states and 39659 transitions. [2021-12-15 09:46:54,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-15 09:46:54,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:54,355 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 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 09:46:54,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:46:54,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-15 09:46:54,572 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:54,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash 609106699, now seen corresponding path program 1 times [2021-12-15 09:46:54,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:54,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982180550] [2021-12-15 09:46:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:54,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 315 proven. 110 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-15 09:46:54,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:54,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982180550] [2021-12-15 09:46:54,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982180550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:46:54,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603824880] [2021-12-15 09:46:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:54,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:46:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:46:54,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:46:54,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:46:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:54,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:46:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:46:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 09:46:55,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:46:55,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603824880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:55,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:46:55,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 09:46:55,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362156633] [2021-12-15 09:46:55,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:55,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:46:55,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:55,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:46:55,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:46:55,514 INFO L87 Difference]: Start difference. First operand 35013 states and 39659 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 09:46:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:58,698 INFO L93 Difference]: Finished difference Result 70832 states and 80144 transitions. [2021-12-15 09:46:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:58,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 402 [2021-12-15 09:46:58,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:58,740 INFO L225 Difference]: With dead ends: 70832 [2021-12-15 09:46:58,740 INFO L226 Difference]: Without dead ends: 36608 [2021-12-15 09:46:58,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:46:58,759 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 769 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:58,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 1077 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 2440 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:46:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36608 states. [2021-12-15 09:46:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36608 to 35013. [2021-12-15 09:46:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35013 states, 35012 states have (on average 1.0884839483605622) internal successors, (38110), 35012 states have internal predecessors, (38110), 0 states have call successors, (0), 0 states 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 09:46:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35013 states to 35013 states and 38110 transitions. [2021-12-15 09:46:59,152 INFO L78 Accepts]: Start accepts. Automaton has 35013 states and 38110 transitions. Word has length 402 [2021-12-15 09:46:59,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:46:59,153 INFO L470 AbstractCegarLoop]: Abstraction has 35013 states and 38110 transitions. [2021-12-15 09:46:59,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 09:46:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 35013 states and 38110 transitions. [2021-12-15 09:46:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-12-15 09:46:59,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:46:59,164 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:46:59,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:46:59,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:46:59,389 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:46:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:46:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -70918865, now seen corresponding path program 1 times [2021-12-15 09:46:59,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:46:59,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97795648] [2021-12-15 09:46:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:46:59,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:46:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:46:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-15 09:46:59,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:46:59,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97795648] [2021-12-15 09:46:59,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97795648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:46:59,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:46:59,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:46:59,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162802818] [2021-12-15 09:46:59,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:46:59,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:46:59,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:46:59,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:46:59,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:46:59,516 INFO L87 Difference]: Start difference. First operand 35013 states and 38110 transitions. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 09:47:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:47:05,648 INFO L93 Difference]: Finished difference Result 104857 states and 114546 transitions. [2021-12-15 09:47:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:47:05,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 451 [2021-12-15 09:47:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:47:05,740 INFO L225 Difference]: With dead ends: 104857 [2021-12-15 09:47:05,740 INFO L226 Difference]: Without dead ends: 70633 [2021-12-15 09:47:05,766 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 09:47:05,767 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 1705 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 5987 mSolverCounterSat, 1052 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 7039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1052 IncrementalHoareTripleChecker+Valid, 5987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:47:05,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1705 Valid, 796 Invalid, 7039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1052 Valid, 5987 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-15 09:47:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70633 states. [2021-12-15 09:47:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70633 to 48407. [2021-12-15 09:47:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48407 states, 48406 states have (on average 1.0793496673966037) internal successors, (52247), 48406 states have internal predecessors, (52247), 0 states have call successors, (0), 0 states 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 09:47:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48407 states to 48407 states and 52247 transitions. [2021-12-15 09:47:06,274 INFO L78 Accepts]: Start accepts. Automaton has 48407 states and 52247 transitions. Word has length 451 [2021-12-15 09:47:06,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:47:06,274 INFO L470 AbstractCegarLoop]: Abstraction has 48407 states and 52247 transitions. [2021-12-15 09:47:06,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 09:47:06,274 INFO L276 IsEmpty]: Start isEmpty. Operand 48407 states and 52247 transitions. [2021-12-15 09:47:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-12-15 09:47:06,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:47:06,285 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:47:06,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:47:06,286 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:47:06,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:47:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1887672211, now seen corresponding path program 1 times [2021-12-15 09:47:06,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:47:06,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487103670] [2021-12-15 09:47:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:47:06,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:47:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:47:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-15 09:47:06,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:47:06,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487103670] [2021-12-15 09:47:06,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487103670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:47:06,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:47:06,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:47:06,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204071600] [2021-12-15 09:47:06,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:47:06,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:47:06,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:47:06,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:47:06,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:47:06,438 INFO L87 Difference]: Start difference. First operand 48407 states and 52247 transitions. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)