./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label15.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 c74a9fc611cd640e8aacda017f0a1ef6db7219ef212e2ffc5499141a277c3acd --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:16:16,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:16:16,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:16:16,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:16:16,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:16:16,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:16:16,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:16:16,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:16:16,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:16:16,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:16:16,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:16:16,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:16:16,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:16:16,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:16:16,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:16:16,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:16:16,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:16:16,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:16:16,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:16:16,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:16:16,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:16:16,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:16:16,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:16:16,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:16:16,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:16:16,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:16:16,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:16:16,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:16:16,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:16:16,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:16:16,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:16:16,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:16:16,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:16:16,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:16:16,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:16:16,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:16:16,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:16:16,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:16:16,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:16:16,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:16:16,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:16:16,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:16:16,159 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:16:16,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:16:16,160 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:16:16,160 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:16:16,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:16:16,161 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:16:16,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:16:16,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:16:16,161 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:16:16,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:16:16,162 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:16:16,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:16:16,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:16:16,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:16:16,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:16:16,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:16:16,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:16:16,163 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:16:16,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:16:16,164 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:16:16,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:16:16,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:16:16,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:16:16,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:16:16,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:16:16,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:16:16,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:16:16,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:16:16,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:16:16,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:16:16,166 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:16:16,166 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:16:16,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:16:16,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:16:16,167 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c74a9fc611cd640e8aacda017f0a1ef6db7219ef212e2ffc5499141a277c3acd [2021-12-22 09:16:16,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:16:16,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:16:16,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:16:16,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:16:16,399 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:16:16,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label15.c [2021-12-22 09:16:16,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28282d48e/0e52f48ddd3743d98567b29e205e31ea/FLAG84950641e [2021-12-22 09:16:16,936 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:16:16,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label15.c [2021-12-22 09:16:16,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28282d48e/0e52f48ddd3743d98567b29e205e31ea/FLAG84950641e [2021-12-22 09:16:17,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28282d48e/0e52f48ddd3743d98567b29e205e31ea [2021-12-22 09:16:17,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:16:17,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:16:17,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:16:17,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:16:17,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:16:17,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:16:17" (1/1) ... [2021-12-22 09:16:17,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c89fd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:17, skipping insertion in model container [2021-12-22 09:16:17,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:16:17" (1/1) ... [2021-12-22 09:16:17,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:16:17,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:16:17,798 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/Problem12_label15.c[6730,6743] [2021-12-22 09:16:18,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:16:18,252 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:16:18,273 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/Problem12_label15.c[6730,6743] [2021-12-22 09:16:18,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:16:18,549 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:16:18,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18 WrapperNode [2021-12-22 09:16:18,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:16:18,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:16:18,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:16:18,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:16:18,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18" (1/1) ... [2021-12-22 09:16:18,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18" (1/1) ... [2021-12-22 09:16:18,819 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-22 09:16:18,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:16:18,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:16:18,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:16:18,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:16:18,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18" (1/1) ... [2021-12-22 09:16:18,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18" (1/1) ... [2021-12-22 09:16:18,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18" (1/1) ... [2021-12-22 09:16:18,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18" (1/1) ... [2021-12-22 09:16:19,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18" (1/1) ... [2021-12-22 09:16:19,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18" (1/1) ... [2021-12-22 09:16:19,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18" (1/1) ... [2021-12-22 09:16:19,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:16:19,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:16:19,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:16:19,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:16:19,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18" (1/1) ... [2021-12-22 09:16:19,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:16:19,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:16:19,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 09:16:19,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 09:16:19,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:16:19,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:16:19,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:16:19,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:16:19,268 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:16:19,269 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:16:22,066 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:16:22,076 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:16:22,076 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:16:22,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:16:22 BoogieIcfgContainer [2021-12-22 09:16:22,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:16:22,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:16:22,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:16:22,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:16:22,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:16:17" (1/3) ... [2021-12-22 09:16:22,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e683a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:16:22, skipping insertion in model container [2021-12-22 09:16:22,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:16:18" (2/3) ... [2021-12-22 09:16:22,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e683a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:16:22, skipping insertion in model container [2021-12-22 09:16:22,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:16:22" (3/3) ... [2021-12-22 09:16:22,084 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label15.c [2021-12-22 09:16:22,087 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:16:22,087 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:16:22,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:16:22,122 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 09:16:22,122 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:16:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 09:16:22,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:22,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:16:22,146 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2021-12-22 09:16:22,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:22,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058694862] [2021-12-22 09:16:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:22,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:16:22,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:22,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058694862] [2021-12-22 09:16:22,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058694862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:22,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:16:22,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:16:22,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720451048] [2021-12-22 09:16:22,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:22,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:16:22,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:22,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:16:22,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:16:22,391 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:16:26,998 INFO L93 Difference]: Finished difference Result 3155 states and 6150 transitions. [2021-12-22 09:16:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 09:16:26,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-22 09:16:27,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:16:27,017 INFO L225 Difference]: With dead ends: 3155 [2021-12-22 09:16:27,018 INFO L226 Difference]: Without dead ends: 2265 [2021-12-22 09:16:27,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:16:27,024 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 2383 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 3734 mSolverCounterSat, 1724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 5458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1724 IncrementalHoareTripleChecker+Valid, 3734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:16:27,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2383 Valid, 234 Invalid, 5458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1724 Valid, 3734 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-22 09:16:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-12-22 09:16:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2257. [2021-12-22 09:16:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.5350177304964538) internal successors, (3463), 2256 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3463 transitions. [2021-12-22 09:16:27,119 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3463 transitions. Word has length 54 [2021-12-22 09:16:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:16:27,120 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3463 transitions. [2021-12-22 09:16:27,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3463 transitions. [2021-12-22 09:16:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-22 09:16:27,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:27,125 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:16:27,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:16:27,126 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash -653035601, now seen corresponding path program 1 times [2021-12-22 09:16:27,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:27,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622046650] [2021-12-22 09:16:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:27,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 09:16:27,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:27,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622046650] [2021-12-22 09:16:27,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622046650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:27,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:16:27,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:16:27,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138402429] [2021-12-22 09:16:27,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:27,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:16:27,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:27,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:16:27,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:16:27,301 INFO L87 Difference]: Start difference. First operand 2257 states and 3463 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:16:30,510 INFO L93 Difference]: Finished difference Result 6051 states and 9664 transitions. [2021-12-22 09:16:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:16:30,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-12-22 09:16:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:16:30,521 INFO L225 Difference]: With dead ends: 6051 [2021-12-22 09:16:30,521 INFO L226 Difference]: Without dead ends: 3759 [2021-12-22 09:16:30,524 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 [2021-12-22 09:16:30,525 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:16:30,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 708 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-22 09:16:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-12-22 09:16:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2021-12-22 09:16:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3408728046833422) internal successors, (5039), 3758 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5039 transitions. [2021-12-22 09:16:30,571 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5039 transitions. Word has length 194 [2021-12-22 09:16:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:16:30,571 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5039 transitions. [2021-12-22 09:16:30,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5039 transitions. [2021-12-22 09:16:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-22 09:16:30,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:30,575 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:16:30,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:16:30,575 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:30,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1501609534, now seen corresponding path program 1 times [2021-12-22 09:16:30,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:30,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132252541] [2021-12-22 09:16:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:30,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 09:16:30,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:30,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132252541] [2021-12-22 09:16:30,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132252541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:30,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:16:30,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:16:30,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414478900] [2021-12-22 09:16:30,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:30,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:16:30,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:30,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:16:30,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:30,744 INFO L87 Difference]: Start difference. First operand 3759 states and 5039 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:16:32,935 INFO L93 Difference]: Finished difference Result 10520 states and 14356 transitions. [2021-12-22 09:16:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:16:32,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 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 264 [2021-12-22 09:16:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:16:32,951 INFO L225 Difference]: With dead ends: 10520 [2021-12-22 09:16:32,952 INFO L226 Difference]: Without dead ends: 6763 [2021-12-22 09:16:32,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:32,961 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 669 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 2834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:16:32,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 486 Invalid, 2834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 09:16:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-12-22 09:16:33,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6012. [2021-12-22 09:16:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 1.2814839460988188) internal successors, (7703), 6011 states have internal predecessors, (7703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7703 transitions. [2021-12-22 09:16:33,038 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 7703 transitions. Word has length 264 [2021-12-22 09:16:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:16:33,039 INFO L470 AbstractCegarLoop]: Abstraction has 6012 states and 7703 transitions. [2021-12-22 09:16:33,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 7703 transitions. [2021-12-22 09:16:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-12-22 09:16:33,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:33,043 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:16:33,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:16:33,043 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:33,044 INFO L85 PathProgramCache]: Analyzing trace with hash -436238599, now seen corresponding path program 1 times [2021-12-22 09:16:33,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:33,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562119466] [2021-12-22 09:16:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:33,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 103 proven. 54 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-22 09:16:33,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:33,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562119466] [2021-12-22 09:16:33,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562119466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:16:33,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107633692] [2021-12-22 09:16:33,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:33,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:16:33,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:16:33,164 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:16:33,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:16:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:33,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:16:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:16:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:16:33,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:16:33,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107633692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:33,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:16:33,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-22 09:16:33,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084119886] [2021-12-22 09:16:33,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:33,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:16:33,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:16:33,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:16:33,692 INFO L87 Difference]: Start difference. First operand 6012 states and 7703 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:16:35,922 INFO L93 Difference]: Finished difference Result 15026 states and 19934 transitions. [2021-12-22 09:16:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:16:35,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 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 277 [2021-12-22 09:16:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:16:35,954 INFO L225 Difference]: With dead ends: 15026 [2021-12-22 09:16:35,954 INFO L226 Difference]: Without dead ends: 9016 [2021-12-22 09:16:35,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:16:35,969 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 908 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:16:35,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 309 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 09:16:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9016 states. [2021-12-22 09:16:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9016 to 9016. [2021-12-22 09:16:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9016 states, 9015 states have (on average 1.2657792567942319) internal successors, (11411), 9015 states have internal predecessors, (11411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9016 states to 9016 states and 11411 transitions. [2021-12-22 09:16:36,082 INFO L78 Accepts]: Start accepts. Automaton has 9016 states and 11411 transitions. Word has length 277 [2021-12-22 09:16:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:16:36,083 INFO L470 AbstractCegarLoop]: Abstraction has 9016 states and 11411 transitions. [2021-12-22 09:16:36,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 9016 states and 11411 transitions. [2021-12-22 09:16:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-22 09:16:36,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:36,087 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:16:36,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:16:36,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:16:36,308 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash -829867597, now seen corresponding path program 1 times [2021-12-22 09:16:36,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:36,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738899157] [2021-12-22 09:16:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:36,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-22 09:16:36,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:36,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738899157] [2021-12-22 09:16:36,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738899157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:36,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:16:36,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:16:36,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046978648] [2021-12-22 09:16:36,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:36,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:16:36,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:36,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:16:36,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:36,412 INFO L87 Difference]: Start difference. First operand 9016 states and 11411 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:16:38,987 INFO L93 Difference]: Finished difference Result 25540 states and 32713 transitions. [2021-12-22 09:16:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:16:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 294 [2021-12-22 09:16:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:16:39,029 INFO L225 Difference]: With dead ends: 25540 [2021-12-22 09:16:39,029 INFO L226 Difference]: Without dead ends: 16526 [2021-12-22 09:16:39,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:39,040 INFO L933 BasicCegarLoop]: 1317 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:16:39,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1325 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 2686 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:16:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16526 states. [2021-12-22 09:16:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 15775. [2021-12-22 09:16:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2523773297831875) internal successors, (19755), 15774 states have internal predecessors, (19755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19755 transitions. [2021-12-22 09:16:39,219 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19755 transitions. Word has length 294 [2021-12-22 09:16:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:16:39,219 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 19755 transitions. [2021-12-22 09:16:39,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:39,220 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19755 transitions. [2021-12-22 09:16:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-12-22 09:16:39,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:39,223 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, 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, 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] [2021-12-22 09:16:39,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:16:39,224 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:39,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1769336259, now seen corresponding path program 1 times [2021-12-22 09:16:39,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:39,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839292881] [2021-12-22 09:16:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:39,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 09:16:39,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:39,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839292881] [2021-12-22 09:16:39,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839292881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:39,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:16:39,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:16:39,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431806878] [2021-12-22 09:16:39,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:39,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:16:39,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:16:39,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:39,385 INFO L87 Difference]: Start difference. First operand 15775 states and 19755 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:41,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:16:41,903 INFO L93 Difference]: Finished difference Result 38307 states and 48288 transitions. [2021-12-22 09:16:41,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:16:41,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 343 [2021-12-22 09:16:41,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:16:41,938 INFO L225 Difference]: With dead ends: 38307 [2021-12-22 09:16:41,938 INFO L226 Difference]: Without dead ends: 22534 [2021-12-22 09:16:41,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:41,955 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 829 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:16:41,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 142 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 09:16:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2021-12-22 09:16:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2021-12-22 09:16:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22534 states, 22533 states have (on average 1.2340567168153376) internal successors, (27807), 22533 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:42,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 27807 transitions. [2021-12-22 09:16:42,183 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 27807 transitions. Word has length 343 [2021-12-22 09:16:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:16:42,185 INFO L470 AbstractCegarLoop]: Abstraction has 22534 states and 27807 transitions. [2021-12-22 09:16:42,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 27807 transitions. [2021-12-22 09:16:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-22 09:16:42,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:42,189 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, 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, 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] [2021-12-22 09:16:42,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:16:42,190 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:42,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1851360552, now seen corresponding path program 1 times [2021-12-22 09:16:42,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:42,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208073720] [2021-12-22 09:16:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:42,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 09:16:42,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:42,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208073720] [2021-12-22 09:16:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208073720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:42,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:16:42,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:16:42,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542051200] [2021-12-22 09:16:42,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:42,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:16:42,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:16:42,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:42,282 INFO L87 Difference]: Start difference. First operand 22534 states and 27807 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:44,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:16:44,634 INFO L93 Difference]: Finished difference Result 45066 states and 55612 transitions. [2021-12-22 09:16:44,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:16:44,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 348 [2021-12-22 09:16:44,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:16:44,663 INFO L225 Difference]: With dead ends: 45066 [2021-12-22 09:16:44,663 INFO L226 Difference]: Without dead ends: 22534 [2021-12-22 09:16:44,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:44,682 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 737 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:16:44,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 187 Invalid, 2945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 09:16:44,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2021-12-22 09:16:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2021-12-22 09:16:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22534 states, 22533 states have (on average 1.2210091865264279) internal successors, (27513), 22533 states have internal predecessors, (27513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 27513 transitions. [2021-12-22 09:16:44,871 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 27513 transitions. Word has length 348 [2021-12-22 09:16:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:16:44,871 INFO L470 AbstractCegarLoop]: Abstraction has 22534 states and 27513 transitions. [2021-12-22 09:16:44,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 27513 transitions. [2021-12-22 09:16:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-22 09:16:44,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:44,877 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, 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, 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] [2021-12-22 09:16:44,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:16:44,877 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash -14553240, now seen corresponding path program 1 times [2021-12-22 09:16:44,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:44,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727045388] [2021-12-22 09:16:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:44,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-22 09:16:45,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:45,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727045388] [2021-12-22 09:16:45,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727045388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:45,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:16:45,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:16:45,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826760351] [2021-12-22 09:16:45,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:45,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:16:45,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:16:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:45,020 INFO L87 Difference]: Start difference. First operand 22534 states and 27513 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:16:47,502 INFO L93 Difference]: Finished difference Result 60837 states and 75395 transitions. [2021-12-22 09:16:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:16:47,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 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 359 [2021-12-22 09:16:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:16:47,558 INFO L225 Difference]: With dead ends: 60837 [2021-12-22 09:16:47,558 INFO L226 Difference]: Without dead ends: 38305 [2021-12-22 09:16:47,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:47,580 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 722 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:16:47,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 424 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 2243 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 09:16:47,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38305 states. [2021-12-22 09:16:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38305 to 38305. [2021-12-22 09:16:47,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38305 states, 38304 states have (on average 1.2043650793650793) internal successors, (46132), 38304 states have internal predecessors, (46132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38305 states to 38305 states and 46132 transitions. [2021-12-22 09:16:48,002 INFO L78 Accepts]: Start accepts. Automaton has 38305 states and 46132 transitions. Word has length 359 [2021-12-22 09:16:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:16:48,002 INFO L470 AbstractCegarLoop]: Abstraction has 38305 states and 46132 transitions. [2021-12-22 09:16:48,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 38305 states and 46132 transitions. [2021-12-22 09:16:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-12-22 09:16:48,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:48,010 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:16:48,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:16:48,011 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:48,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1763235576, now seen corresponding path program 1 times [2021-12-22 09:16:48,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:48,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366692832] [2021-12-22 09:16:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:48,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 339 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:16:48,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:48,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366692832] [2021-12-22 09:16:48,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366692832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:16:48,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296930353] [2021-12-22 09:16:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:48,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:16:48,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:16:48,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:16:48,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:16:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:48,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:16:48,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:16:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-22 09:16:49,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:16:49,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296930353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:49,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:16:49,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-22 09:16:49,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516770862] [2021-12-22 09:16:49,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:49,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:16:49,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:16:49,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:16:49,602 INFO L87 Difference]: Start difference. First operand 38305 states and 46132 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:16:52,354 INFO L93 Difference]: Finished difference Result 83369 states and 99369 transitions. [2021-12-22 09:16:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:16:52,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-12-22 09:16:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:16:52,453 INFO L225 Difference]: With dead ends: 83369 [2021-12-22 09:16:52,453 INFO L226 Difference]: Without dead ends: 83367 [2021-12-22 09:16:52,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:16:52,479 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1904 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1904 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 6454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3794 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:16:52,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1904 Valid, 30 Invalid, 6454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 2380 Invalid, 0 Unknown, 3794 Unchecked, 2.4s Time] [2021-12-22 09:16:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83367 states. [2021-12-22 09:16:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83367 to 82614. [2021-12-22 09:16:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82614 states, 82613 states have (on average 1.1933351893769746) internal successors, (98585), 82613 states have internal predecessors, (98585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82614 states to 82614 states and 98585 transitions. [2021-12-22 09:16:53,311 INFO L78 Accepts]: Start accepts. Automaton has 82614 states and 98585 transitions. Word has length 385 [2021-12-22 09:16:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:16:53,311 INFO L470 AbstractCegarLoop]: Abstraction has 82614 states and 98585 transitions. [2021-12-22 09:16:53,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 82614 states and 98585 transitions. [2021-12-22 09:16:53,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-22 09:16:53,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:53,423 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:16:53,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:16:53,623 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,SelfDestructingSolverStorable8 [2021-12-22 09:16:53,624 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:53,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1465652963, now seen corresponding path program 1 times [2021-12-22 09:16:53,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:53,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054298487] [2021-12-22 09:16:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:53,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-22 09:16:53,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:53,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054298487] [2021-12-22 09:16:53,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054298487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:53,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:16:53,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:16:53,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679866162] [2021-12-22 09:16:53,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:53,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:16:53,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:16:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:53,790 INFO L87 Difference]: Start difference. First operand 82614 states and 98585 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:16:56,758 INFO L93 Difference]: Finished difference Result 193764 states and 232973 transitions. [2021-12-22 09:16:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:16:56,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 386 [2021-12-22 09:16:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:16:56,903 INFO L225 Difference]: With dead ends: 193764 [2021-12-22 09:16:56,904 INFO L226 Difference]: Without dead ends: 111903 [2021-12-22 09:16:56,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:56,950 INFO L933 BasicCegarLoop]: 1260 mSDtfsCounter, 693 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:16:56,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 1268 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:16:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111903 states. [2021-12-22 09:16:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111903 to 111152. [2021-12-22 09:16:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111152 states, 111151 states have (on average 1.1645419294473285) internal successors, (129440), 111151 states have internal predecessors, (129440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:58,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111152 states to 111152 states and 129440 transitions. [2021-12-22 09:16:58,499 INFO L78 Accepts]: Start accepts. Automaton has 111152 states and 129440 transitions. Word has length 386 [2021-12-22 09:16:58,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:16:58,500 INFO L470 AbstractCegarLoop]: Abstraction has 111152 states and 129440 transitions. [2021-12-22 09:16:58,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:16:58,500 INFO L276 IsEmpty]: Start isEmpty. Operand 111152 states and 129440 transitions. [2021-12-22 09:16:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-12-22 09:16:58,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:58,526 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:16:58,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:16:58,526 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:58,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:58,527 INFO L85 PathProgramCache]: Analyzing trace with hash -352558693, now seen corresponding path program 1 times [2021-12-22 09:16:58,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:58,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263402436] [2021-12-22 09:16:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:58,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-22 09:16:58,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:58,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263402436] [2021-12-22 09:16:58,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263402436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:58,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:16:58,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:16:58,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966065396] [2021-12-22 09:16:58,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:58,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:16:58,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:58,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:16:58,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:58,638 INFO L87 Difference]: Start difference. First operand 111152 states and 129440 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:17:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:17:01,731 INFO L93 Difference]: Finished difference Result 260603 states and 302428 transitions. [2021-12-22 09:17:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:17:01,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 438 [2021-12-22 09:17:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:17:02,017 INFO L225 Difference]: With dead ends: 260603 [2021-12-22 09:17:02,018 INFO L226 Difference]: Without dead ends: 150204 [2021-12-22 09:17:02,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:17:02,052 INFO L933 BasicCegarLoop]: 1302 mSDtfsCounter, 686 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:17:02,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 1310 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 09:17:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150204 states. [2021-12-22 09:17:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150204 to 141943. [2021-12-22 09:17:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141943 states, 141942 states have (on average 1.1375843654450408) internal successors, (161471), 141942 states have internal predecessors, (161471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:17:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141943 states to 141943 states and 161471 transitions. [2021-12-22 09:17:03,773 INFO L78 Accepts]: Start accepts. Automaton has 141943 states and 161471 transitions. Word has length 438 [2021-12-22 09:17:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:17:03,774 INFO L470 AbstractCegarLoop]: Abstraction has 141943 states and 161471 transitions. [2021-12-22 09:17:03,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:17:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 141943 states and 161471 transitions. [2021-12-22 09:17:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-12-22 09:17:03,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:17:03,780 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, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:17:03,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:17:03,791 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:17:03,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:17:03,792 INFO L85 PathProgramCache]: Analyzing trace with hash 258597530, now seen corresponding path program 1 times [2021-12-22 09:17:03,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:17:03,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191505480] [2021-12-22 09:17:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:17:03,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:17:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:17:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-22 09:17:03,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:17:03,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191505480] [2021-12-22 09:17:03,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191505480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:17:03,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:17:03,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:17:03,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745340289] [2021-12-22 09:17:03,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:17:03,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:17:03,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:17:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:17:03,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:17:03,940 INFO L87 Difference]: Start difference. First operand 141943 states and 161471 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:17:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:17:06,912 INFO L93 Difference]: Finished difference Result 302659 states and 343362 transitions. [2021-12-22 09:17:06,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:17:06,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 450 [2021-12-22 09:17:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:17:07,126 INFO L225 Difference]: With dead ends: 302659 [2021-12-22 09:17:07,127 INFO L226 Difference]: Without dead ends: 161469 [2021-12-22 09:17:07,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:17:07,180 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 803 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:17:07,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 916 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 2143 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 09:17:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161469 states. [2021-12-22 09:17:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161469 to 152457. [2021-12-22 09:17:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152457 states, 152456 states have (on average 1.115043028808312) internal successors, (169995), 152456 states have internal predecessors, (169995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:17:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152457 states to 152457 states and 169995 transitions. [2021-12-22 09:17:09,156 INFO L78 Accepts]: Start accepts. Automaton has 152457 states and 169995 transitions. Word has length 450 [2021-12-22 09:17:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:17:09,156 INFO L470 AbstractCegarLoop]: Abstraction has 152457 states and 169995 transitions. [2021-12-22 09:17:09,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:17:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 152457 states and 169995 transitions. [2021-12-22 09:17:09,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-12-22 09:17:09,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:17:09,165 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:17:09,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:17:09,166 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:17:09,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:17:09,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1217174117, now seen corresponding path program 1 times [2021-12-22 09:17:09,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:17:09,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581565421] [2021-12-22 09:17:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:17:09,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:17:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:17:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 394 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-22 09:17:09,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:17:09,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581565421] [2021-12-22 09:17:09,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581565421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:17:09,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:17:09,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:17:09,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085767477] [2021-12-22 09:17:09,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:17:09,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:17:09,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:17:09,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:17:09,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:17:09,283 INFO L87 Difference]: Start difference. First operand 152457 states and 169995 transitions. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:17:12,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:17:12,431 INFO L93 Difference]: Finished difference Result 307916 states and 343014 transitions. [2021-12-22 09:17:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:17:12,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 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 494 [2021-12-22 09:17:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:17:12,698 INFO L225 Difference]: With dead ends: 307916 [2021-12-22 09:17:12,699 INFO L226 Difference]: Without dead ends: 156212 [2021-12-22 09:17:12,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:17:12,755 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 681 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:17:12,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 220 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 2229 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 09:17:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156212 states. [2021-12-22 09:17:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156212 to 152457. [2021-12-22 09:17:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152457 states, 152456 states have (on average 1.0913247100802854) internal successors, (166379), 152456 states have internal predecessors, (166379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:17:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152457 states to 152457 states and 166379 transitions. [2021-12-22 09:17:14,439 INFO L78 Accepts]: Start accepts. Automaton has 152457 states and 166379 transitions. Word has length 494 [2021-12-22 09:17:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:17:14,439 INFO L470 AbstractCegarLoop]: Abstraction has 152457 states and 166379 transitions. [2021-12-22 09:17:14,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:17:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 152457 states and 166379 transitions. [2021-12-22 09:17:14,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-12-22 09:17:14,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:17:14,448 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:17:14,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:17:14,449 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:17:14,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:17:14,449 INFO L85 PathProgramCache]: Analyzing trace with hash 88206328, now seen corresponding path program 1 times [2021-12-22 09:17:14,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:17:14,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241549693] [2021-12-22 09:17:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:17:14,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:17:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:17:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-22 09:17:14,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:17:14,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241549693] [2021-12-22 09:17:14,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241549693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:17:14,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:17:14,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:17:14,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107981645] [2021-12-22 09:17:14,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:17:14,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:17:14,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:17:14,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:17:14,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:17:14,566 INFO L87 Difference]: Start difference. First operand 152457 states and 166379 transitions. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)