./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label37.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label37.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 a60dbc2f79c578f373d1608befa1a0be5fe97eed98271e53ccf8c768ad5b972e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:34:56,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:34:56,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:34:56,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:34:56,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:34:56,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:34:56,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:34:56,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:34:56,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:34:56,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:34:56,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:34:56,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:34:56,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:34:56,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:34:56,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:34:56,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:34:56,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:34:56,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:34:56,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:34:56,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:34:56,080 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:34:56,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:34:56,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:34:56,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:34:56,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:34:56,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:34:56,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:34:56,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:34:56,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:34:56,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:34:56,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:34:56,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:34:56,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:34:56,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:34:56,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:34:56,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:34:56,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:34:56,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:34:56,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:34:56,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:34:56,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:34:56,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:34:56,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:34:56,134 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:34:56,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:34:56,137 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:34:56,137 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:34:56,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:34:56,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:34:56,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:34:56,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:34:56,139 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:34:56,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:34:56,140 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:34:56,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:34:56,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:34:56,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:34:56,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:34:56,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:34:56,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:34:56,141 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:34:56,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:34:56,143 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:34:56,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:34:56,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:34:56,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:34:56,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:34:56,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:34:56,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:34:56,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:34:56,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:34:56,145 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:34:56,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:34:56,145 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:34:56,146 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:34:56,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:34:56,146 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a60dbc2f79c578f373d1608befa1a0be5fe97eed98271e53ccf8c768ad5b972e [2022-07-22 12:34:56,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:34:56,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:34:56,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:34:56,428 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:34:56,428 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:34:56,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label37.c [2022-07-22 12:34:56,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c6b4314/551a16091c9c4a3f84f250544cd6d1b0/FLAG1b1a9db46 [2022-07-22 12:34:57,169 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:34:57,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label37.c [2022-07-22 12:34:57,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c6b4314/551a16091c9c4a3f84f250544cd6d1b0/FLAG1b1a9db46 [2022-07-22 12:34:57,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c6b4314/551a16091c9c4a3f84f250544cd6d1b0 [2022-07-22 12:34:57,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:34:57,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:34:57,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:34:57,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:34:57,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:34:57,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:34:57" (1/1) ... [2022-07-22 12:34:57,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46f70c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:57, skipping insertion in model container [2022-07-22 12:34:57,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:34:57" (1/1) ... [2022-07-22 12:34:57,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:34:57,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:34:57,947 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label37.c[7700,7713] [2022-07-22 12:34:58,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:34:58,829 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:34:58,865 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label37.c[7700,7713] [2022-07-22 12:34:59,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:34:59,317 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:34:59,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59 WrapperNode [2022-07-22 12:34:59,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:34:59,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:34:59,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:34:59,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:34:59,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59" (1/1) ... [2022-07-22 12:34:59,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59" (1/1) ... [2022-07-22 12:35:00,062 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-22 12:35:00,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:35:00,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:35:00,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:35:00,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:35:00,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59" (1/1) ... [2022-07-22 12:35:00,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59" (1/1) ... [2022-07-22 12:35:00,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59" (1/1) ... [2022-07-22 12:35:00,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59" (1/1) ... [2022-07-22 12:35:00,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59" (1/1) ... [2022-07-22 12:35:00,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59" (1/1) ... [2022-07-22 12:35:00,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59" (1/1) ... [2022-07-22 12:35:00,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:35:00,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:35:00,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:35:00,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:35:00,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59" (1/1) ... [2022-07-22 12:35:00,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:35:00,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:35:00,825 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) [2022-07-22 12:35:00,852 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 [2022-07-22 12:35:00,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:35:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:35:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:35:00,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:35:00,945 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:35:00,947 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:35:05,298 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:35:05,311 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:35:05,311 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:35:05,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:35:05 BoogieIcfgContainer [2022-07-22 12:35:05,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:35:05,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:35:05,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:35:05,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:35:05,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:34:57" (1/3) ... [2022-07-22 12:35:05,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1ec411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:35:05, skipping insertion in model container [2022-07-22 12:35:05,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:34:59" (2/3) ... [2022-07-22 12:35:05,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1ec411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:35:05, skipping insertion in model container [2022-07-22 12:35:05,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:35:05" (3/3) ... [2022-07-22 12:35:05,322 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label37.c [2022-07-22 12:35:05,335 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:35:05,335 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:35:05,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:35:05,401 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4c49c7f8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7f6f387c [2022-07-22 12:35:05,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:35:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 12:35:05,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:05,421 INFO L195 NwaCegarLoop]: 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] [2022-07-22 12:35:05,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:05,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2022-07-22 12:35:05,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:05,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629148691] [2022-07-22 12:35:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:05,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:35:05,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:05,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629148691] [2022-07-22 12:35:05,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629148691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:05,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:05,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:35:05,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068019080] [2022-07-22 12:35:05,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:05,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:05,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:05,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:05,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:05,766 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 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) [2022-07-22 12:35:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:10,043 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2022-07-22 12:35:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:35:10,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 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 [2022-07-22 12:35:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:10,073 INFO L225 Difference]: With dead ends: 3121 [2022-07-22 12:35:10,073 INFO L226 Difference]: Without dead ends: 1944 [2022-07-22 12:35:10,082 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:35:10,085 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 935 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:10,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-22 12:35:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-07-22 12:35:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2022-07-22 12:35:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2022-07-22 12:35:10,212 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 54 [2022-07-22 12:35:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:10,212 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2022-07-22 12:35:10,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 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) [2022-07-22 12:35:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2022-07-22 12:35:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-22 12:35:10,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:10,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:35:10,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:35:10,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash 916312146, now seen corresponding path program 1 times [2022-07-22 12:35:10,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:10,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192344923] [2022-07-22 12:35:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:10,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:35:10,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192344923] [2022-07-22 12:35:10,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192344923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:10,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:10,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:35:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515141585] [2022-07-22 12:35:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:10,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:10,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:10,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:10,378 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:13,987 INFO L93 Difference]: Finished difference Result 5351 states and 9369 transitions. [2022-07-22 12:35:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:35:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2022-07-22 12:35:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:14,003 INFO L225 Difference]: With dead ends: 5351 [2022-07-22 12:35:14,003 INFO L226 Difference]: Without dead ends: 3480 [2022-07-22 12:35:14,007 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:35:14,008 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 884 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:14,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1079 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-22 12:35:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2022-07-22 12:35:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479. [2022-07-22 12:35:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions. [2022-07-22 12:35:14,088 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 119 [2022-07-22 12:35:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:14,091 INFO L495 AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions. [2022-07-22 12:35:14,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions. [2022-07-22 12:35:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-22 12:35:14,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:14,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:35:14,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:35:14,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash -717638515, now seen corresponding path program 1 times [2022-07-22 12:35:14,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:14,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87469892] [2022-07-22 12:35:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:14,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:35:14,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:14,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87469892] [2022-07-22 12:35:14,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87469892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:14,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:14,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:35:14,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655296313] [2022-07-22 12:35:14,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:14,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:14,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:14,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:14,227 INFO L87 Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:17,389 INFO L93 Difference]: Finished difference Result 10142 states and 15438 transitions. [2022-07-22 12:35:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:35:17,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2022-07-22 12:35:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:17,417 INFO L225 Difference]: With dead ends: 10142 [2022-07-22 12:35:17,417 INFO L226 Difference]: Without dead ends: 6665 [2022-07-22 12:35:17,425 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:35:17,431 INFO L413 NwaCegarLoop]: 744 mSDtfsCounter, 976 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:17,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 877 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-22 12:35:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6665 states. [2022-07-22 12:35:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6665 to 6657. [2022-07-22 12:35:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions. [2022-07-22 12:35:17,560 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 121 [2022-07-22 12:35:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:17,562 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions. [2022-07-22 12:35:17,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions. [2022-07-22 12:35:17,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-22 12:35:17,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:17,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:35:17,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:35:17,565 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash -523925634, now seen corresponding path program 1 times [2022-07-22 12:35:17,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:17,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410211011] [2022-07-22 12:35:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:17,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:35:17,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:17,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410211011] [2022-07-22 12:35:17,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410211011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:17,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:17,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:35:17,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503958922] [2022-07-22 12:35:17,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:17,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:17,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:17,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:17,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:17,677 INFO L87 Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:20,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:20,734 INFO L93 Difference]: Finished difference Result 19637 states and 26969 transitions. [2022-07-22 12:35:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:35:20,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2022-07-22 12:35:20,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:20,778 INFO L225 Difference]: With dead ends: 19637 [2022-07-22 12:35:20,779 INFO L226 Difference]: Without dead ends: 12982 [2022-07-22 12:35:20,792 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:35:20,793 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 791 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:20,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1163 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 12:35:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2022-07-22 12:35:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12175. [2022-07-22 12:35:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12175 states, 12174 states have (on average 1.2529160505996386) internal successors, (15253), 12174 states have internal predecessors, (15253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12175 states to 12175 states and 15253 transitions. [2022-07-22 12:35:21,008 INFO L78 Accepts]: Start accepts. Automaton has 12175 states and 15253 transitions. Word has length 127 [2022-07-22 12:35:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:21,009 INFO L495 AbstractCegarLoop]: Abstraction has 12175 states and 15253 transitions. [2022-07-22 12:35:21,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 12175 states and 15253 transitions. [2022-07-22 12:35:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-22 12:35:21,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:21,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:35:21,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:35:21,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:21,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:21,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1324072554, now seen corresponding path program 1 times [2022-07-22 12:35:21,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:21,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813361338] [2022-07-22 12:35:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:21,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:35:21,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:21,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813361338] [2022-07-22 12:35:21,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813361338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:21,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:21,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:35:21,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867166727] [2022-07-22 12:35:21,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:21,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:21,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:21,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:21,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:21,164 INFO L87 Difference]: Start difference. First operand 12175 states and 15253 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:23,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:23,783 INFO L93 Difference]: Finished difference Result 25135 states and 31306 transitions. [2022-07-22 12:35:23,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:35:23,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2022-07-22 12:35:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:23,809 INFO L225 Difference]: With dead ends: 25135 [2022-07-22 12:35:23,809 INFO L226 Difference]: Without dead ends: 12962 [2022-07-22 12:35:23,821 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:35:23,822 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:23,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:35:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12962 states. [2022-07-22 12:35:23,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12962 to 12962. [2022-07-22 12:35:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12962 states, 12961 states have (on average 1.2379446030398888) internal successors, (16045), 12961 states have internal predecessors, (16045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12962 states to 12962 states and 16045 transitions. [2022-07-22 12:35:24,021 INFO L78 Accepts]: Start accepts. Automaton has 12962 states and 16045 transitions. Word has length 143 [2022-07-22 12:35:24,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:24,023 INFO L495 AbstractCegarLoop]: Abstraction has 12962 states and 16045 transitions. [2022-07-22 12:35:24,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:24,027 INFO L276 IsEmpty]: Start isEmpty. Operand 12962 states and 16045 transitions. [2022-07-22 12:35:24,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-22 12:35:24,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:24,028 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:35:24,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:35:24,029 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:24,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1155556459, now seen corresponding path program 1 times [2022-07-22 12:35:24,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:24,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141775143] [2022-07-22 12:35:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:24,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:35:24,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:24,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141775143] [2022-07-22 12:35:24,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141775143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:24,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:24,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:35:24,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210828128] [2022-07-22 12:35:24,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:24,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:24,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:24,182 INFO L87 Difference]: Start difference. First operand 12962 states and 16045 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:27,382 INFO L93 Difference]: Finished difference Result 31448 states and 39970 transitions. [2022-07-22 12:35:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:35:27,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2022-07-22 12:35:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:27,422 INFO L225 Difference]: With dead ends: 31448 [2022-07-22 12:35:27,423 INFO L226 Difference]: Without dead ends: 19275 [2022-07-22 12:35:27,438 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:35:27,439 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 909 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 908 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 908 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:27,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 957 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [908 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-22 12:35:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19275 states. [2022-07-22 12:35:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19275 to 18478. [2022-07-22 12:35:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18478 states, 18477 states have (on average 1.2248200465443524) internal successors, (22631), 18477 states have internal predecessors, (22631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:27,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18478 states to 18478 states and 22631 transitions. [2022-07-22 12:35:27,686 INFO L78 Accepts]: Start accepts. Automaton has 18478 states and 22631 transitions. Word has length 150 [2022-07-22 12:35:27,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:27,687 INFO L495 AbstractCegarLoop]: Abstraction has 18478 states and 22631 transitions. [2022-07-22 12:35:27,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:27,687 INFO L276 IsEmpty]: Start isEmpty. Operand 18478 states and 22631 transitions. [2022-07-22 12:35:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-22 12:35:27,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:27,690 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:35:27,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:35:27,691 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:27,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1592160981, now seen corresponding path program 1 times [2022-07-22 12:35:27,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:27,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716635456] [2022-07-22 12:35:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:27,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-22 12:35:27,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:27,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716635456] [2022-07-22 12:35:27,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716635456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:27,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:27,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:35:27,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151174143] [2022-07-22 12:35:27,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:27,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:27,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:27,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:27,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:27,801 INFO L87 Difference]: Start difference. First operand 18478 states and 22631 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:31,159 INFO L93 Difference]: Finished difference Result 42487 states and 53153 transitions. [2022-07-22 12:35:31,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:35:31,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 239 [2022-07-22 12:35:31,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:31,212 INFO L225 Difference]: With dead ends: 42487 [2022-07-22 12:35:31,212 INFO L226 Difference]: Without dead ends: 24798 [2022-07-22 12:35:31,229 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:35:31,230 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 996 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 1023 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 3412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1023 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:31,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 795 Invalid, 3412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1023 Valid, 2389 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 12:35:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24798 states. [2022-07-22 12:35:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24798 to 24786. [2022-07-22 12:35:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24786 states, 24785 states have (on average 1.230260238047206) internal successors, (30492), 24785 states have internal predecessors, (30492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:31,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24786 states to 24786 states and 30492 transitions. [2022-07-22 12:35:31,565 INFO L78 Accepts]: Start accepts. Automaton has 24786 states and 30492 transitions. Word has length 239 [2022-07-22 12:35:31,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:31,565 INFO L495 AbstractCegarLoop]: Abstraction has 24786 states and 30492 transitions. [2022-07-22 12:35:31,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 24786 states and 30492 transitions. [2022-07-22 12:35:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-07-22 12:35:31,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:31,572 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:35:31,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:35:31,572 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:31,573 INFO L85 PathProgramCache]: Analyzing trace with hash -28316692, now seen corresponding path program 1 times [2022-07-22 12:35:31,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:31,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758942677] [2022-07-22 12:35:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:31,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:35:31,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:31,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758942677] [2022-07-22 12:35:31,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758942677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:31,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:31,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:35:31,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792931991] [2022-07-22 12:35:31,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:31,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:35:31,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:35:31,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:35:31,782 INFO L87 Difference]: Start difference. First operand 24786 states and 30492 transitions. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:36,286 INFO L93 Difference]: Finished difference Result 73224 states and 90680 transitions. [2022-07-22 12:35:36,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:35:36,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 316 [2022-07-22 12:35:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:36,363 INFO L225 Difference]: With dead ends: 73224 [2022-07-22 12:35:36,363 INFO L226 Difference]: Without dead ends: 49227 [2022-07-22 12:35:36,388 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:35:36,389 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 2294 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 3987 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2294 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 4836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 3987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:36,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2294 Valid, 757 Invalid, 4836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 3987 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-22 12:35:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49227 states. [2022-07-22 12:35:36,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49227 to 49213. [2022-07-22 12:35:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49213 states, 49212 states have (on average 1.2029992684711046) internal successors, (59202), 49212 states have internal predecessors, (59202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49213 states to 49213 states and 59202 transitions. [2022-07-22 12:35:37,015 INFO L78 Accepts]: Start accepts. Automaton has 49213 states and 59202 transitions. Word has length 316 [2022-07-22 12:35:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:37,017 INFO L495 AbstractCegarLoop]: Abstraction has 49213 states and 59202 transitions. [2022-07-22 12:35:37,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 49213 states and 59202 transitions. [2022-07-22 12:35:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-07-22 12:35:37,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:37,026 INFO L195 NwaCegarLoop]: 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:35:37,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:35:37,028 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:37,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1413029796, now seen corresponding path program 1 times [2022-07-22 12:35:37,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:37,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489036649] [2022-07-22 12:35:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:37,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 379 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-22 12:35:37,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:37,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489036649] [2022-07-22 12:35:37,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489036649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:37,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:37,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:35:37,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306675835] [2022-07-22 12:35:37,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:37,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:35:37,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:37,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:35:37,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:35:37,170 INFO L87 Difference]: Start difference. First operand 49213 states and 59202 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:44,252 INFO L93 Difference]: Finished difference Result 138781 states and 168388 transitions. [2022-07-22 12:35:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:35:44,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 342 [2022-07-22 12:35:44,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:44,369 INFO L225 Difference]: With dead ends: 138781 [2022-07-22 12:35:44,370 INFO L226 Difference]: Without dead ends: 90357 [2022-07-22 12:35:44,414 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:35:44,415 INFO L413 NwaCegarLoop]: 879 mSDtfsCounter, 1709 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 7204 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 8185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 7204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:44,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 1140 Invalid, 8185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 7204 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-07-22 12:35:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90357 states. [2022-07-22 12:35:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90357 to 90227. [2022-07-22 12:35:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90227 states, 90226 states have (on average 1.1906656617826348) internal successors, (107429), 90226 states have internal predecessors, (107429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90227 states to 90227 states and 107429 transitions. [2022-07-22 12:35:45,514 INFO L78 Accepts]: Start accepts. Automaton has 90227 states and 107429 transitions. Word has length 342 [2022-07-22 12:35:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:45,517 INFO L495 AbstractCegarLoop]: Abstraction has 90227 states and 107429 transitions. [2022-07-22 12:35:45,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand 90227 states and 107429 transitions. [2022-07-22 12:35:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-07-22 12:35:45,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:45,524 INFO L195 NwaCegarLoop]: 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, 2, 2, 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] [2022-07-22 12:35:45,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:35:45,525 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:45,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1271299818, now seen corresponding path program 1 times [2022-07-22 12:35:45,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:45,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304592107] [2022-07-22 12:35:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:45,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:35:46,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:46,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304592107] [2022-07-22 12:35:46,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304592107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:35:46,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155070380] [2022-07-22 12:35:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:46,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:35:46,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:35:46,095 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) [2022-07-22 12:35:46,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:35:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:46,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:35:46,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:35:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-22 12:35:47,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:35:47,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155070380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:47,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:35:47,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-07-22 12:35:47,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331095990] [2022-07-22 12:35:47,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:47,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:47,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:35:47,250 INFO L87 Difference]: Start difference. First operand 90227 states and 107429 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:50,358 INFO L93 Difference]: Finished difference Result 167867 states and 201404 transitions. [2022-07-22 12:35:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:35:50,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 345 [2022-07-22 12:35:50,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:50,585 INFO L225 Difference]: With dead ends: 167867 [2022-07-22 12:35:50,585 INFO L226 Difference]: Without dead ends: 93390 [2022-07-22 12:35:50,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:35:50,623 INFO L413 NwaCegarLoop]: 1088 mSDtfsCounter, 643 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:50,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1225 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:35:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93390 states. [2022-07-22 12:35:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93390 to 91801. [2022-07-22 12:35:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91801 states, 91800 states have (on average 1.1878322440087146) internal successors, (109043), 91800 states have internal predecessors, (109043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91801 states to 91801 states and 109043 transitions. [2022-07-22 12:35:51,868 INFO L78 Accepts]: Start accepts. Automaton has 91801 states and 109043 transitions. Word has length 345 [2022-07-22 12:35:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:51,869 INFO L495 AbstractCegarLoop]: Abstraction has 91801 states and 109043 transitions. [2022-07-22 12:35:51,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 91801 states and 109043 transitions. [2022-07-22 12:35:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-07-22 12:35:51,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:51,877 INFO L195 NwaCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:35:51,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 12:35:52,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 12:35:52,092 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:52,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:52,092 INFO L85 PathProgramCache]: Analyzing trace with hash -850235256, now seen corresponding path program 1 times [2022-07-22 12:35:52,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:52,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573142319] [2022-07-22 12:35:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:52,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-22 12:35:52,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:52,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573142319] [2022-07-22 12:35:52,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573142319] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:52,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:52,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:35:52,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854313095] [2022-07-22 12:35:52,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:52,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:52,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:52,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:52,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:52,368 INFO L87 Difference]: Start difference. First operand 91801 states and 109043 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:55,601 INFO L93 Difference]: Finished difference Result 182817 states and 217304 transitions. [2022-07-22 12:35:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:35:55,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 403 [2022-07-22 12:35:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:55,861 INFO L225 Difference]: With dead ends: 182817 [2022-07-22 12:35:55,861 INFO L226 Difference]: Without dead ends: 91805 [2022-07-22 12:35:55,900 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:35:55,908 INFO L413 NwaCegarLoop]: 1425 mSDtfsCounter, 954 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 3109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:55,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 1520 Invalid, 3109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 2495 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:35:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91805 states. [2022-07-22 12:35:56,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91805 to 91793. [2022-07-22 12:35:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91793 states, 91792 states have (on average 1.1372995468014642) internal successors, (104395), 91792 states have internal predecessors, (104395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91793 states to 91793 states and 104395 transitions. [2022-07-22 12:35:57,038 INFO L78 Accepts]: Start accepts. Automaton has 91793 states and 104395 transitions. Word has length 403 [2022-07-22 12:35:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:57,039 INFO L495 AbstractCegarLoop]: Abstraction has 91793 states and 104395 transitions. [2022-07-22 12:35:57,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:57,039 INFO L276 IsEmpty]: Start isEmpty. Operand 91793 states and 104395 transitions. [2022-07-22 12:35:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-07-22 12:35:57,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:57,048 INFO L195 NwaCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:35:57,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 12:35:57,048 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:57,049 INFO L85 PathProgramCache]: Analyzing trace with hash -137763772, now seen corresponding path program 1 times [2022-07-22 12:35:57,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:57,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744023652] [2022-07-22 12:35:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:57,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-07-22 12:35:57,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:57,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744023652] [2022-07-22 12:35:57,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744023652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:57,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:57,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:35:57,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357972308] [2022-07-22 12:35:57,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:57,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:57,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:57,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:57,249 INFO L87 Difference]: Start difference. First operand 91793 states and 104395 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:00,662 INFO L93 Difference]: Finished difference Result 167847 states and 192284 transitions. [2022-07-22 12:36:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:00,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 427 [2022-07-22 12:36:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:00,766 INFO L225 Difference]: With dead ends: 167847 [2022-07-22 12:36:00,766 INFO L226 Difference]: Without dead ends: 91804 [2022-07-22 12:36:00,804 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:36:00,804 INFO L413 NwaCegarLoop]: 1052 mSDtfsCounter, 725 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2729 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:00,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 1234 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2729 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 12:36:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91804 states. [2022-07-22 12:36:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91804 to 91793. [2022-07-22 12:36:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91793 states, 91792 states have (on average 1.1367548370228342) internal successors, (104345), 91792 states have internal predecessors, (104345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91793 states to 91793 states and 104345 transitions. [2022-07-22 12:36:01,863 INFO L78 Accepts]: Start accepts. Automaton has 91793 states and 104345 transitions. Word has length 427 [2022-07-22 12:36:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:01,863 INFO L495 AbstractCegarLoop]: Abstraction has 91793 states and 104345 transitions. [2022-07-22 12:36:01,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:01,864 INFO L276 IsEmpty]: Start isEmpty. Operand 91793 states and 104345 transitions. [2022-07-22 12:36:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-07-22 12:36:01,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:01,873 INFO L195 NwaCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:36:01,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 12:36:01,874 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash 44906732, now seen corresponding path program 1 times [2022-07-22 12:36:01,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:01,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635073789] [2022-07-22 12:36:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:01,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-22 12:36:02,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:02,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635073789] [2022-07-22 12:36:02,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635073789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:02,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:02,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:36:02,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255767287] [2022-07-22 12:36:02,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:02,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:02,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:02,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:02,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:02,011 INFO L87 Difference]: Start difference. First operand 91793 states and 104345 transitions. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:05,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:05,875 INFO L93 Difference]: Finished difference Result 246518 states and 281711 transitions. [2022-07-22 12:36:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:05,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 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 434 [2022-07-22 12:36:05,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:06,079 INFO L225 Difference]: With dead ends: 246518 [2022-07-22 12:36:06,080 INFO L226 Difference]: Without dead ends: 152363 [2022-07-22 12:36:06,129 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:36:06,129 INFO L413 NwaCegarLoop]: 1761 mSDtfsCounter, 888 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 3259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:06,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1897 Invalid, 3259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [803 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-22 12:36:06,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152363 states. [2022-07-22 12:36:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152363 to 142120. [2022-07-22 12:36:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142120 states, 142119 states have (on average 1.108148804874788) internal successors, (157489), 142119 states have internal predecessors, (157489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:07,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142120 states to 142120 states and 157489 transitions. [2022-07-22 12:36:07,970 INFO L78 Accepts]: Start accepts. Automaton has 142120 states and 157489 transitions. Word has length 434 [2022-07-22 12:36:07,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:07,970 INFO L495 AbstractCegarLoop]: Abstraction has 142120 states and 157489 transitions. [2022-07-22 12:36:07,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:07,971 INFO L276 IsEmpty]: Start isEmpty. Operand 142120 states and 157489 transitions. [2022-07-22 12:36:07,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-07-22 12:36:07,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:07,980 INFO L195 NwaCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:07,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 12:36:07,981 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1669071297, now seen corresponding path program 1 times [2022-07-22 12:36:07,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:07,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551880941] [2022-07-22 12:36:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:07,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 207 proven. 75 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-07-22 12:36:08,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:08,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551880941] [2022-07-22 12:36:08,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551880941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:36:08,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960040403] [2022-07-22 12:36:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:08,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:36:08,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:36:08,222 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) [2022-07-22 12:36:08,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:36:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:08,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:36:08,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:36:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2022-07-22 12:36:09,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:36:09,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960040403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:09,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:36:09,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 12:36:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62797702] [2022-07-22 12:36:09,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:09,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:09,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:36:09,134 INFO L87 Difference]: Start difference. First operand 142120 states and 157489 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:12,527 INFO L93 Difference]: Finished difference Result 283440 states and 314176 transitions. [2022-07-22 12:36:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:12,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 451 [2022-07-22 12:36:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:12,712 INFO L225 Difference]: With dead ends: 283440 [2022-07-22 12:36:12,712 INFO L226 Difference]: Without dead ends: 142109 [2022-07-22 12:36:12,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:36:12,767 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 1005 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:12,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 755 Invalid, 2817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:36:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142109 states. [2022-07-22 12:36:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142109 to 142106. [2022-07-22 12:36:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142106 states, 142105 states have (on average 1.0810808908905387) internal successors, (153627), 142105 states have internal predecessors, (153627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142106 states to 142106 states and 153627 transitions. [2022-07-22 12:36:14,527 INFO L78 Accepts]: Start accepts. Automaton has 142106 states and 153627 transitions. Word has length 451 [2022-07-22 12:36:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:14,527 INFO L495 AbstractCegarLoop]: Abstraction has 142106 states and 153627 transitions. [2022-07-22 12:36:14,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 142106 states and 153627 transitions. [2022-07-22 12:36:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-07-22 12:36:14,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:14,535 INFO L195 NwaCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:14,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 12:36:14,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 12:36:14,744 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:14,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1601864273, now seen corresponding path program 1 times [2022-07-22 12:36:14,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:14,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784205573] [2022-07-22 12:36:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:14,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-07-22 12:36:14,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:14,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784205573] [2022-07-22 12:36:14,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784205573] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:14,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:14,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:36:14,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887927363] [2022-07-22 12:36:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:14,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:14,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:14,970 INFO L87 Difference]: Start difference. First operand 142106 states and 153627 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:18,557 INFO L93 Difference]: Finished difference Result 283421 states and 306461 transitions. [2022-07-22 12:36:18,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:18,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 456 [2022-07-22 12:36:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:18,745 INFO L225 Difference]: With dead ends: 283421 [2022-07-22 12:36:18,745 INFO L226 Difference]: Without dead ends: 142104 [2022-07-22 12:36:19,163 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:36:19,174 INFO L413 NwaCegarLoop]: 1314 mSDtfsCounter, 1108 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:19,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 1392 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:36:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142104 states. [2022-07-22 12:36:20,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142104 to 142103. [2022-07-22 12:36:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142103 states, 142102 states have (on average 1.0619414223585875) internal successors, (150904), 142102 states have internal predecessors, (150904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142103 states to 142103 states and 150904 transitions. [2022-07-22 12:36:20,703 INFO L78 Accepts]: Start accepts. Automaton has 142103 states and 150904 transitions. Word has length 456 [2022-07-22 12:36:20,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:20,703 INFO L495 AbstractCegarLoop]: Abstraction has 142103 states and 150904 transitions. [2022-07-22 12:36:20,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand 142103 states and 150904 transitions. [2022-07-22 12:36:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-07-22 12:36:20,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:20,715 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:20,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 12:36:20,716 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:20,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash -312690779, now seen corresponding path program 1 times [2022-07-22 12:36:20,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:20,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950200271] [2022-07-22 12:36:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:20,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 558 proven. 100 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2022-07-22 12:36:21,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:21,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950200271] [2022-07-22 12:36:21,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950200271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:36:21,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111033317] [2022-07-22 12:36:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:21,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:36:21,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:36:21,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:36:21,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:36:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:21,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:36:21,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:36:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 809 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-07-22 12:36:22,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:36:22,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111033317] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:22,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:36:22,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-07-22 12:36:22,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363238095] [2022-07-22 12:36:22,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:22,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:36:22,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:36:22,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:36:22,420 INFO L87 Difference]: Start difference. First operand 142103 states and 150904 transitions. Second operand has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:26,711 INFO L93 Difference]: Finished difference Result 275542 states and 293229 transitions. [2022-07-22 12:36:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:36:26,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 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 545 [2022-07-22 12:36:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:26,903 INFO L225 Difference]: With dead ends: 275542 [2022-07-22 12:36:26,904 INFO L226 Difference]: Without dead ends: 149187 [2022-07-22 12:36:26,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 543 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:36:26,961 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 1610 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 4452 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 4805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 4452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:26,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 876 Invalid, 4805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 4452 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-22 12:36:27,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149187 states. [2022-07-22 12:36:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149187 to 146825. [2022-07-22 12:36:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146825 states, 146824 states have (on average 1.06099820192884) internal successors, (155780), 146824 states have internal predecessors, (155780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146825 states to 146825 states and 155780 transitions. [2022-07-22 12:36:28,921 INFO L78 Accepts]: Start accepts. Automaton has 146825 states and 155780 transitions. Word has length 545 [2022-07-22 12:36:28,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:28,921 INFO L495 AbstractCegarLoop]: Abstraction has 146825 states and 155780 transitions. [2022-07-22 12:36:28,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 146825 states and 155780 transitions. [2022-07-22 12:36:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-07-22 12:36:28,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:28,934 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:28,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 12:36:29,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:36:29,135 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash -705129669, now seen corresponding path program 1 times [2022-07-22 12:36:29,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:29,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579932505] [2022-07-22 12:36:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:29,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 587 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2022-07-22 12:36:29,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:29,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579932505] [2022-07-22 12:36:29,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579932505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:29,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:29,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:36:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989385439] [2022-07-22 12:36:29,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:29,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:29,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:29,330 INFO L87 Difference]: Start difference. First operand 146825 states and 155780 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:32,919 INFO L93 Difference]: Finished difference Result 295257 states and 313203 transitions. [2022-07-22 12:36:32,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:32,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 549 [2022-07-22 12:36:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:33,145 INFO L225 Difference]: With dead ends: 295257 [2022-07-22 12:36:33,146 INFO L226 Difference]: Without dead ends: 147642 [2022-07-22 12:36:33,229 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:36:33,229 INFO L413 NwaCegarLoop]: 1665 mSDtfsCounter, 718 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2426 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:33,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 1802 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2426 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 12:36:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147642 states. [2022-07-22 12:36:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147642 to 141301. [2022-07-22 12:36:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141301 states, 141300 states have (on average 1.055166312809625) internal successors, (149095), 141300 states have internal predecessors, (149095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141301 states to 141301 states and 149095 transitions. [2022-07-22 12:36:35,505 INFO L78 Accepts]: Start accepts. Automaton has 141301 states and 149095 transitions. Word has length 549 [2022-07-22 12:36:35,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:35,505 INFO L495 AbstractCegarLoop]: Abstraction has 141301 states and 149095 transitions. [2022-07-22 12:36:35,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 141301 states and 149095 transitions. [2022-07-22 12:36:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2022-07-22 12:36:35,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:35,522 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:35,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 12:36:35,523 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:35,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:35,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1127182790, now seen corresponding path program 1 times [2022-07-22 12:36:35,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:35,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425238790] [2022-07-22 12:36:35,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:35,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 638 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2022-07-22 12:36:35,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425238790] [2022-07-22 12:36:35,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425238790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:35,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:35,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:36:35,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249798791] [2022-07-22 12:36:35,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:35,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:35,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:35,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:35,717 INFO L87 Difference]: Start difference. First operand 141301 states and 149095 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:39,440 INFO L93 Difference]: Finished difference Result 313300 states and 331920 transitions. [2022-07-22 12:36:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:39,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 578 [2022-07-22 12:36:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:39,663 INFO L225 Difference]: With dead ends: 313300 [2022-07-22 12:36:39,664 INFO L226 Difference]: Without dead ends: 172788 [2022-07-22 12:36:39,725 INFO L412 NwaCegarLoop]: 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 [2022-07-22 12:36:39,726 INFO L413 NwaCegarLoop]: 1696 mSDtfsCounter, 759 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:39,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 1834 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 2440 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:36:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172788 states. [2022-07-22 12:36:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172788 to 170419. [2022-07-22 12:36:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170419 states, 170418 states have (on average 1.052371228391367) internal successors, (179343), 170418 states have internal predecessors, (179343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170419 states to 170419 states and 179343 transitions. [2022-07-22 12:36:42,188 INFO L78 Accepts]: Start accepts. Automaton has 170419 states and 179343 transitions. Word has length 578 [2022-07-22 12:36:42,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:42,189 INFO L495 AbstractCegarLoop]: Abstraction has 170419 states and 179343 transitions. [2022-07-22 12:36:42,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:42,189 INFO L276 IsEmpty]: Start isEmpty. Operand 170419 states and 179343 transitions. [2022-07-22 12:36:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2022-07-22 12:36:42,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:42,206 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:42,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 12:36:42,206 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:42,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1462924076, now seen corresponding path program 1 times [2022-07-22 12:36:42,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:42,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344926458] [2022-07-22 12:36:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:42,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 836 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-07-22 12:36:42,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:42,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344926458] [2022-07-22 12:36:42,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344926458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:42,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:42,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:36:42,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459612441] [2022-07-22 12:36:42,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:42,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:42,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:42,430 INFO L87 Difference]: Start difference. First operand 170419 states and 179343 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)