./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.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 93af4e6a9c0eb04ce4865a35985b5a12937072c2a8c22ec9da868c5c828002bb --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:54:43,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:54:43,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:54:44,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:54:44,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:54:44,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:54:44,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:54:44,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:54:44,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:54:44,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:54:44,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:54:44,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:54:44,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:54:44,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:54:44,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:54:44,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:54:44,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:54:44,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:54:44,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:54:44,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:54:44,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:54:44,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:54:44,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:54:44,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:54:44,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:54:44,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:54:44,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:54:44,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:54:44,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:54:44,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:54:44,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:54:44,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:54:44,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:54:44,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:54:44,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:54:44,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:54:44,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:54:44,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:54:44,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:54:44,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:54:44,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:54:44,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:54:44,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:54:44,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:54:44,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:54:44,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:54:44,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:54:44,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:54:44,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:54:44,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:54:44,087 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:54:44,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:54:44,088 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:54:44,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:54:44,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:54:44,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:54:44,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:54:44,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:54:44,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:54:44,089 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:54:44,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:54:44,089 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:54:44,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:54:44,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:54:44,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:54:44,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:54:44,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:54:44,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:54:44,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:54:44,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:54:44,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:54:44,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:54:44,092 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:54:44,092 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:54:44,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:54:44,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:54:44,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93af4e6a9c0eb04ce4865a35985b5a12937072c2a8c22ec9da868c5c828002bb [2021-12-21 13:54:44,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:54:44,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:54:44,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:54:44,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:54:44,320 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:54:44,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:54:44,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53c3e0427/9af518bf0fb14ab3b5f753083bb54899/FLAG53e17da9b [2021-12-21 13:54:44,778 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:54:44,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:54:44,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53c3e0427/9af518bf0fb14ab3b5f753083bb54899/FLAG53e17da9b [2021-12-21 13:54:44,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53c3e0427/9af518bf0fb14ab3b5f753083bb54899 [2021-12-21 13:54:44,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:54:44,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:54:44,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:54:44,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:54:44,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:54:44,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:54:44" (1/1) ... [2021-12-21 13:54:44,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e0fd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:44, skipping insertion in model container [2021-12-21 13:54:44,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:54:44" (1/1) ... [2021-12-21 13:54:44,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:54:44,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:54:45,104 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/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[10668,10681] [2021-12-21 13:54:45,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:54:45,186 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:54:45,248 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/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[10668,10681] [2021-12-21 13:54:45,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:54:45,319 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:54:45,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45 WrapperNode [2021-12-21 13:54:45,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:54:45,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:54:45,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:54:45,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:54:45,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45" (1/1) ... [2021-12-21 13:54:45,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45" (1/1) ... [2021-12-21 13:54:45,385 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 952 [2021-12-21 13:54:45,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:54:45,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:54:45,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:54:45,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:54:45,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45" (1/1) ... [2021-12-21 13:54:45,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45" (1/1) ... [2021-12-21 13:54:45,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45" (1/1) ... [2021-12-21 13:54:45,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45" (1/1) ... [2021-12-21 13:54:45,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45" (1/1) ... [2021-12-21 13:54:45,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45" (1/1) ... [2021-12-21 13:54:45,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45" (1/1) ... [2021-12-21 13:54:45,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:54:45,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:54:45,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:54:45,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:54:45,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45" (1/1) ... [2021-12-21 13:54:45,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:54:45,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:54:45,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 13:54:45,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 13:54:45,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:54:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:54:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:54:45,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:54:45,642 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:54:45,644 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:54:46,203 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:54:46,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:54:46,213 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 13:54:46,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:54:46 BoogieIcfgContainer [2021-12-21 13:54:46,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:54:46,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:54:46,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:54:46,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:54:46,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:54:44" (1/3) ... [2021-12-21 13:54:46,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eb2ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:54:46, skipping insertion in model container [2021-12-21 13:54:46,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:54:45" (2/3) ... [2021-12-21 13:54:46,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eb2ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:54:46, skipping insertion in model container [2021-12-21 13:54:46,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:54:46" (3/3) ... [2021-12-21 13:54:46,223 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:54:46,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:54:46,226 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:54:46,259 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:54:46,263 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 13:54:46,264 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:54:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 247 states, 245 states have (on average 1.7591836734693878) internal successors, (431), 246 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:46,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-21 13:54:46,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:46,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:46,292 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1005429677, now seen corresponding path program 1 times [2021-12-21 13:54:46,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:46,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143930927] [2021-12-21 13:54:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:46,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:46,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:46,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143930927] [2021-12-21 13:54:46,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143930927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:46,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:46,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:54:46,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964989004] [2021-12-21 13:54:46,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:46,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:54:46,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:46,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:54:46,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:54:46,764 INFO L87 Difference]: Start difference. First operand has 247 states, 245 states have (on average 1.7591836734693878) internal successors, (431), 246 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:46,933 INFO L93 Difference]: Finished difference Result 714 states and 1248 transitions. [2021-12-21 13:54:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:54:46,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-12-21 13:54:46,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:46,950 INFO L225 Difference]: With dead ends: 714 [2021-12-21 13:54:46,951 INFO L226 Difference]: Without dead ends: 470 [2021-12-21 13:54:46,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:54:46,957 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 1005 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:46,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 993 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:46,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-12-21 13:54:47,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 468. [2021-12-21 13:54:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 1.4753747323340471) internal successors, (689), 467 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 689 transitions. [2021-12-21 13:54:47,026 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 689 transitions. Word has length 101 [2021-12-21 13:54:47,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:47,027 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 689 transitions. [2021-12-21 13:54:47,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 689 transitions. [2021-12-21 13:54:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 13:54:47,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:47,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:47,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:54:47,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:47,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:47,037 INFO L85 PathProgramCache]: Analyzing trace with hash -769716679, now seen corresponding path program 1 times [2021-12-21 13:54:47,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:47,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167692314] [2021-12-21 13:54:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:47,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:47,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:47,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167692314] [2021-12-21 13:54:47,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167692314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:47,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:47,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:54:47,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307341041] [2021-12-21 13:54:47,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:47,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:54:47,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:47,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:54:47,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:47,122 INFO L87 Difference]: Start difference. First operand 468 states and 689 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:47,171 INFO L93 Difference]: Finished difference Result 1366 states and 2005 transitions. [2021-12-21 13:54:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:54:47,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-12-21 13:54:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:47,175 INFO L225 Difference]: With dead ends: 1366 [2021-12-21 13:54:47,176 INFO L226 Difference]: Without dead ends: 926 [2021-12-21 13:54:47,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:47,178 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 352 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:47,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 1041 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:47,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-12-21 13:54:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 470. [2021-12-21 13:54:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.4733475479744136) internal successors, (691), 469 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 691 transitions. [2021-12-21 13:54:47,245 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 691 transitions. Word has length 102 [2021-12-21 13:54:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:47,247 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 691 transitions. [2021-12-21 13:54:47,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:47,248 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 691 transitions. [2021-12-21 13:54:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 13:54:47,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:47,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:47,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:54:47,252 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1142488916, now seen corresponding path program 1 times [2021-12-21 13:54:47,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:47,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216993925] [2021-12-21 13:54:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:47,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:47,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:47,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216993925] [2021-12-21 13:54:47,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216993925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:47,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:47,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:54:47,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126463834] [2021-12-21 13:54:47,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:47,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:54:47,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:47,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:54:47,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:47,337 INFO L87 Difference]: Start difference. First operand 470 states and 691 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:47,396 INFO L93 Difference]: Finished difference Result 977 states and 1492 transitions. [2021-12-21 13:54:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:54:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-12-21 13:54:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:47,401 INFO L225 Difference]: With dead ends: 977 [2021-12-21 13:54:47,401 INFO L226 Difference]: Without dead ends: 634 [2021-12-21 13:54:47,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:47,407 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 233 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:47,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 745 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-21 13:54:47,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 618. [2021-12-21 13:54:47,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.5153970826580228) internal successors, (935), 617 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 935 transitions. [2021-12-21 13:54:47,447 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 935 transitions. Word has length 103 [2021-12-21 13:54:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:47,447 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 935 transitions. [2021-12-21 13:54:47,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:47,448 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 935 transitions. [2021-12-21 13:54:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 13:54:47,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:47,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:47,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:54:47,453 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash -362955380, now seen corresponding path program 1 times [2021-12-21 13:54:47,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:47,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524105094] [2021-12-21 13:54:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:47,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:47,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:47,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524105094] [2021-12-21 13:54:47,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524105094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:47,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:47,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:54:47,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12718983] [2021-12-21 13:54:47,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:47,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:54:47,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:47,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:54:47,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:54:47,567 INFO L87 Difference]: Start difference. First operand 618 states and 935 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:47,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:47,705 INFO L93 Difference]: Finished difference Result 1766 states and 2661 transitions. [2021-12-21 13:54:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:54:47,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-12-21 13:54:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:47,712 INFO L225 Difference]: With dead ends: 1766 [2021-12-21 13:54:47,712 INFO L226 Difference]: Without dead ends: 1178 [2021-12-21 13:54:47,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:54:47,721 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 760 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:47,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 858 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-12-21 13:54:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1176. [2021-12-21 13:54:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 1.4978723404255319) internal successors, (1760), 1175 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1760 transitions. [2021-12-21 13:54:47,830 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1760 transitions. Word has length 103 [2021-12-21 13:54:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:47,830 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 1760 transitions. [2021-12-21 13:54:47,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1760 transitions. [2021-12-21 13:54:47,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 13:54:47,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:47,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:47,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:54:47,832 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:47,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1797210952, now seen corresponding path program 1 times [2021-12-21 13:54:47,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:47,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572803265] [2021-12-21 13:54:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:47,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:47,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:47,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572803265] [2021-12-21 13:54:47,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572803265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:47,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:47,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:54:47,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439891219] [2021-12-21 13:54:47,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:47,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:54:47,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:54:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:47,864 INFO L87 Difference]: Start difference. First operand 1176 states and 1760 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:48,009 INFO L93 Difference]: Finished difference Result 3452 states and 5160 transitions. [2021-12-21 13:54:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:54:48,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-12-21 13:54:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:48,015 INFO L225 Difference]: With dead ends: 3452 [2021-12-21 13:54:48,016 INFO L226 Difference]: Without dead ends: 2320 [2021-12-21 13:54:48,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:48,017 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 336 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:48,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 1046 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:48,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-12-21 13:54:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1180. [2021-12-21 13:54:48,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 1.4961832061068703) internal successors, (1764), 1179 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1764 transitions. [2021-12-21 13:54:48,097 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1764 transitions. Word has length 104 [2021-12-21 13:54:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:48,098 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 1764 transitions. [2021-12-21 13:54:48,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1764 transitions. [2021-12-21 13:54:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 13:54:48,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:48,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:48,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:54:48,100 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash 978474865, now seen corresponding path program 1 times [2021-12-21 13:54:48,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:48,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133207729] [2021-12-21 13:54:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:48,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:48,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:48,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133207729] [2021-12-21 13:54:48,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133207729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:48,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:48,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:54:48,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535091920] [2021-12-21 13:54:48,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:48,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:54:48,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:54:48,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:48,133 INFO L87 Difference]: Start difference. First operand 1180 states and 1764 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:48,279 INFO L93 Difference]: Finished difference Result 2640 states and 4114 transitions. [2021-12-21 13:54:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:54:48,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-12-21 13:54:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:48,285 INFO L225 Difference]: With dead ends: 2640 [2021-12-21 13:54:48,285 INFO L226 Difference]: Without dead ends: 1744 [2021-12-21 13:54:48,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:48,287 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 241 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:48,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 729 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-12-21 13:54:48,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1690. [2021-12-21 13:54:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.5429248075784487) internal successors, (2606), 1689 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2606 transitions. [2021-12-21 13:54:48,419 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2606 transitions. Word has length 105 [2021-12-21 13:54:48,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:48,419 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2606 transitions. [2021-12-21 13:54:48,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2606 transitions. [2021-12-21 13:54:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 13:54:48,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:48,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:48,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:54:48,421 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:48,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:48,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1850549439, now seen corresponding path program 1 times [2021-12-21 13:54:48,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:48,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725761113] [2021-12-21 13:54:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:48,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:48,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:48,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725761113] [2021-12-21 13:54:48,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725761113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:48,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:48,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:54:48,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728327461] [2021-12-21 13:54:48,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:48,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:54:48,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:48,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:54:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:48,459 INFO L87 Difference]: Start difference. First operand 1690 states and 2606 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:48,678 INFO L93 Difference]: Finished difference Result 4594 states and 7162 transitions. [2021-12-21 13:54:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:54:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-12-21 13:54:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:48,689 INFO L225 Difference]: With dead ends: 4594 [2021-12-21 13:54:48,689 INFO L226 Difference]: Without dead ends: 3236 [2021-12-21 13:54:48,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:48,692 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 280 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:48,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 980 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-12-21 13:54:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3234. [2021-12-21 13:54:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3233 states have (on average 1.530467058459635) internal successors, (4948), 3233 states have internal predecessors, (4948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 4948 transitions. [2021-12-21 13:54:48,919 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 4948 transitions. Word has length 105 [2021-12-21 13:54:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:48,920 INFO L470 AbstractCegarLoop]: Abstraction has 3234 states and 4948 transitions. [2021-12-21 13:54:48,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 4948 transitions. [2021-12-21 13:54:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 13:54:48,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:48,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:48,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:54:48,924 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:48,925 INFO L85 PathProgramCache]: Analyzing trace with hash -417340030, now seen corresponding path program 1 times [2021-12-21 13:54:48,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:48,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377117741] [2021-12-21 13:54:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:48,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:49,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377117741] [2021-12-21 13:54:49,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377117741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:49,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:49,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:54:49,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112704548] [2021-12-21 13:54:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:49,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:54:49,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:49,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:54:49,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:54:49,021 INFO L87 Difference]: Start difference. First operand 3234 states and 4948 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:49,431 INFO L93 Difference]: Finished difference Result 8716 states and 13341 transitions. [2021-12-21 13:54:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:54:49,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-12-21 13:54:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:49,447 INFO L225 Difference]: With dead ends: 8716 [2021-12-21 13:54:49,448 INFO L226 Difference]: Without dead ends: 5519 [2021-12-21 13:54:49,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:54:49,452 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 653 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:49,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 1218 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5519 states. [2021-12-21 13:54:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5519 to 5517. [2021-12-21 13:54:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 5516 states have (on average 1.5159535895576504) internal successors, (8362), 5516 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 8362 transitions. [2021-12-21 13:54:49,838 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 8362 transitions. Word has length 105 [2021-12-21 13:54:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:49,838 INFO L470 AbstractCegarLoop]: Abstraction has 5517 states and 8362 transitions. [2021-12-21 13:54:49,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 8362 transitions. [2021-12-21 13:54:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 13:54:49,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:49,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:49,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:54:49,842 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash 540693227, now seen corresponding path program 1 times [2021-12-21 13:54:49,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:49,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083063279] [2021-12-21 13:54:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:49,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:49,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:49,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083063279] [2021-12-21 13:54:49,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083063279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:49,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:49,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:54:49,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675793079] [2021-12-21 13:54:49,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:49,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:54:49,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:49,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:54:49,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:54:49,895 INFO L87 Difference]: Start difference. First operand 5517 states and 8362 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:50,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:50,465 INFO L93 Difference]: Finished difference Result 11296 states and 16989 transitions. [2021-12-21 13:54:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:54:50,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-12-21 13:54:50,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:50,482 INFO L225 Difference]: With dead ends: 11296 [2021-12-21 13:54:50,483 INFO L226 Difference]: Without dead ends: 5896 [2021-12-21 13:54:50,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:54:50,491 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 698 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:50,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 881 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5896 states. [2021-12-21 13:54:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5896 to 5741. [2021-12-21 13:54:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5741 states, 5740 states have (on average 1.4993031358885018) internal successors, (8606), 5740 states have internal predecessors, (8606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5741 states to 5741 states and 8606 transitions. [2021-12-21 13:54:50,925 INFO L78 Accepts]: Start accepts. Automaton has 5741 states and 8606 transitions. Word has length 105 [2021-12-21 13:54:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:50,925 INFO L470 AbstractCegarLoop]: Abstraction has 5741 states and 8606 transitions. [2021-12-21 13:54:50,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:50,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5741 states and 8606 transitions. [2021-12-21 13:54:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 13:54:50,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:50,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:50,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:54:50,930 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:50,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash 138743479, now seen corresponding path program 1 times [2021-12-21 13:54:50,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:50,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362817172] [2021-12-21 13:54:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:50,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:50,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:50,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362817172] [2021-12-21 13:54:50,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362817172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:50,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:50,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:54:50,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067720252] [2021-12-21 13:54:50,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:50,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:54:50,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:50,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:54:50,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:50,956 INFO L87 Difference]: Start difference. First operand 5741 states and 8606 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:51,843 INFO L93 Difference]: Finished difference Result 16497 states and 24904 transitions. [2021-12-21 13:54:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:54:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-21 13:54:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:51,874 INFO L225 Difference]: With dead ends: 16497 [2021-12-21 13:54:51,874 INFO L226 Difference]: Without dead ends: 11357 [2021-12-21 13:54:51,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:51,886 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 320 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:51,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 826 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11357 states. [2021-12-21 13:54:52,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11357 to 5757. [2021-12-21 13:54:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5757 states, 5756 states have (on average 1.4979152189020153) internal successors, (8622), 5756 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5757 states to 5757 states and 8622 transitions. [2021-12-21 13:54:52,382 INFO L78 Accepts]: Start accepts. Automaton has 5757 states and 8622 transitions. Word has length 106 [2021-12-21 13:54:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:52,382 INFO L470 AbstractCegarLoop]: Abstraction has 5757 states and 8622 transitions. [2021-12-21 13:54:52,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:52,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5757 states and 8622 transitions. [2021-12-21 13:54:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-21 13:54:52,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:52,386 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:52,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:54:52,387 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:52,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2082987062, now seen corresponding path program 1 times [2021-12-21 13:54:52,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:52,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079402520] [2021-12-21 13:54:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:52,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:52,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:52,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079402520] [2021-12-21 13:54:52,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079402520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:52,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:52,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:54:52,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176723497] [2021-12-21 13:54:52,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:52,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:54:52,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:54:52,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:54:52,458 INFO L87 Difference]: Start difference. First operand 5757 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:52,880 INFO L93 Difference]: Finished difference Result 11504 states and 17230 transitions. [2021-12-21 13:54:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:54:52,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-21 13:54:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:52,891 INFO L225 Difference]: With dead ends: 11504 [2021-12-21 13:54:52,891 INFO L226 Difference]: Without dead ends: 5755 [2021-12-21 13:54:52,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:54:52,898 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 65 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:52,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1110 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2021-12-21 13:54:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5755. [2021-12-21 13:54:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5755 states, 5754 states have (on average 1.4977407021202642) internal successors, (8618), 5754 states have internal predecessors, (8618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5755 states to 5755 states and 8618 transitions. [2021-12-21 13:54:53,331 INFO L78 Accepts]: Start accepts. Automaton has 5755 states and 8618 transitions. Word has length 107 [2021-12-21 13:54:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:53,331 INFO L470 AbstractCegarLoop]: Abstraction has 5755 states and 8618 transitions. [2021-12-21 13:54:53,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:53,332 INFO L276 IsEmpty]: Start isEmpty. Operand 5755 states and 8618 transitions. [2021-12-21 13:54:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-21 13:54:53,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:53,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:53,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:54:53,336 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:53,339 INFO L85 PathProgramCache]: Analyzing trace with hash 248103490, now seen corresponding path program 1 times [2021-12-21 13:54:53,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:53,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141758060] [2021-12-21 13:54:53,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:53,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:53,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:53,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141758060] [2021-12-21 13:54:53,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141758060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:53,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:53,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:54:53,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838232971] [2021-12-21 13:54:53,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:53,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:54:53,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:54:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:53,376 INFO L87 Difference]: Start difference. First operand 5755 states and 8618 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:54,105 INFO L93 Difference]: Finished difference Result 13045 states and 19796 transitions. [2021-12-21 13:54:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:54:54,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-21 13:54:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:54,123 INFO L225 Difference]: With dead ends: 13045 [2021-12-21 13:54:54,124 INFO L226 Difference]: Without dead ends: 8501 [2021-12-21 13:54:54,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:54,132 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 288 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:54,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 748 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-12-21 13:54:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 8499. [2021-12-21 13:54:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8499 states, 8498 states have (on average 1.476818074841139) internal successors, (12550), 8498 states have internal predecessors, (12550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 12550 transitions. [2021-12-21 13:54:54,971 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 12550 transitions. Word has length 107 [2021-12-21 13:54:54,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:54,971 INFO L470 AbstractCegarLoop]: Abstraction has 8499 states and 12550 transitions. [2021-12-21 13:54:54,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:54,971 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 12550 transitions. [2021-12-21 13:54:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 13:54:54,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:54,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:54,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:54:54,976 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1043025895, now seen corresponding path program 1 times [2021-12-21 13:54:54,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:54,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34543240] [2021-12-21 13:54:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:54,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:55,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:55,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34543240] [2021-12-21 13:54:55,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34543240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:55,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:55,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:54:55,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532658138] [2021-12-21 13:54:55,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:55,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:54:55,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:54:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:55,008 INFO L87 Difference]: Start difference. First operand 8499 states and 12550 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:56,043 INFO L93 Difference]: Finished difference Result 18359 states and 28094 transitions. [2021-12-21 13:54:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:54:56,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-12-21 13:54:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:56,065 INFO L225 Difference]: With dead ends: 18359 [2021-12-21 13:54:56,065 INFO L226 Difference]: Without dead ends: 12642 [2021-12-21 13:54:56,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:54:56,072 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 245 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:56,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 712 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:54:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12642 states. [2021-12-21 13:54:57,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12642 to 12180. [2021-12-21 13:54:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12180 states, 12179 states have (on average 1.5104688398062238) internal successors, (18396), 12179 states have internal predecessors, (18396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12180 states to 12180 states and 18396 transitions. [2021-12-21 13:54:57,101 INFO L78 Accepts]: Start accepts. Automaton has 12180 states and 18396 transitions. Word has length 109 [2021-12-21 13:54:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:57,101 INFO L470 AbstractCegarLoop]: Abstraction has 12180 states and 18396 transitions. [2021-12-21 13:54:57,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 12180 states and 18396 transitions. [2021-12-21 13:54:57,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 13:54:57,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:57,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:57,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:54:57,106 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:57,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:57,107 INFO L85 PathProgramCache]: Analyzing trace with hash 211922380, now seen corresponding path program 1 times [2021-12-21 13:54:57,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:57,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734455216] [2021-12-21 13:54:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:57,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:57,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:57,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734455216] [2021-12-21 13:54:57,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734455216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:57,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:57,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:54:57,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623587096] [2021-12-21 13:54:57,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:57,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:54:57,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:57,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:54:57,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:54:57,151 INFO L87 Difference]: Start difference. First operand 12180 states and 18396 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:54:58,511 INFO L93 Difference]: Finished difference Result 23210 states and 35482 transitions. [2021-12-21 13:54:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:54:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-21 13:54:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:54:58,533 INFO L225 Difference]: With dead ends: 23210 [2021-12-21 13:54:58,534 INFO L226 Difference]: Without dead ends: 12180 [2021-12-21 13:54:58,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:54:58,548 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 886 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:54:58,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 374 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:54:58,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12180 states. [2021-12-21 13:54:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12180 to 12180. [2021-12-21 13:54:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12180 states, 12179 states have (on average 1.496838820921258) internal successors, (18230), 12179 states have internal predecessors, (18230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12180 states to 12180 states and 18230 transitions. [2021-12-21 13:54:59,748 INFO L78 Accepts]: Start accepts. Automaton has 12180 states and 18230 transitions. Word has length 110 [2021-12-21 13:54:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:54:59,749 INFO L470 AbstractCegarLoop]: Abstraction has 12180 states and 18230 transitions. [2021-12-21 13:54:59,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:54:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 12180 states and 18230 transitions. [2021-12-21 13:54:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 13:54:59,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:54:59,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:54:59,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:54:59,754 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:54:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:54:59,754 INFO L85 PathProgramCache]: Analyzing trace with hash 410270887, now seen corresponding path program 1 times [2021-12-21 13:54:59,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:54:59,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586975666] [2021-12-21 13:54:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:54:59,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:54:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:54:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:54:59,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:54:59,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586975666] [2021-12-21 13:54:59,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586975666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:54:59,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:54:59,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:54:59,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853684366] [2021-12-21 13:54:59,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:54:59,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:54:59,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:54:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:54:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:54:59,809 INFO L87 Difference]: Start difference. First operand 12180 states and 18230 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:01,761 INFO L93 Difference]: Finished difference Result 30759 states and 46380 transitions. [2021-12-21 13:55:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-21 13:55:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:01,796 INFO L225 Difference]: With dead ends: 30759 [2021-12-21 13:55:01,796 INFO L226 Difference]: Without dead ends: 18927 [2021-12-21 13:55:01,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:01,813 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 695 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:01,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 890 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18927 states. [2021-12-21 13:55:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18927 to 18925. [2021-12-21 13:55:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18925 states, 18924 states have (on average 1.4930247305009512) internal successors, (28254), 18924 states have internal predecessors, (28254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18925 states to 18925 states and 28254 transitions. [2021-12-21 13:55:04,003 INFO L78 Accepts]: Start accepts. Automaton has 18925 states and 28254 transitions. Word has length 110 [2021-12-21 13:55:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:04,004 INFO L470 AbstractCegarLoop]: Abstraction has 18925 states and 28254 transitions. [2021-12-21 13:55:04,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 18925 states and 28254 transitions. [2021-12-21 13:55:04,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 13:55:04,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:04,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:55:04,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:55:04,010 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:04,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:04,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2110822017, now seen corresponding path program 1 times [2021-12-21 13:55:04,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:04,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839530300] [2021-12-21 13:55:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:04,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:55:04,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:04,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839530300] [2021-12-21 13:55:04,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839530300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:04,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:04,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:55:04,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268671642] [2021-12-21 13:55:04,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:04,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:55:04,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:04,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:55:04,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:55:04,076 INFO L87 Difference]: Start difference. First operand 18925 states and 28254 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:05,853 INFO L93 Difference]: Finished difference Result 29923 states and 44851 transitions. [2021-12-21 13:55:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:05,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-12-21 13:55:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:05,879 INFO L225 Difference]: With dead ends: 29923 [2021-12-21 13:55:05,880 INFO L226 Difference]: Without dead ends: 15895 [2021-12-21 13:55:05,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:05,897 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 53 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:05,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1076 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:05,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15895 states. [2021-12-21 13:55:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15895 to 15895. [2021-12-21 13:55:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15895 states, 15894 states have (on average 1.4882345539197182) internal successors, (23654), 15894 states have internal predecessors, (23654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15895 states to 15895 states and 23654 transitions. [2021-12-21 13:55:07,589 INFO L78 Accepts]: Start accepts. Automaton has 15895 states and 23654 transitions. Word has length 112 [2021-12-21 13:55:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:07,589 INFO L470 AbstractCegarLoop]: Abstraction has 15895 states and 23654 transitions. [2021-12-21 13:55:07,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 15895 states and 23654 transitions. [2021-12-21 13:55:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-21 13:55:07,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:07,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:55:07,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:55:07,595 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:07,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:07,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2111608284, now seen corresponding path program 1 times [2021-12-21 13:55:07,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:07,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991213967] [2021-12-21 13:55:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:07,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:55:07,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:07,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991213967] [2021-12-21 13:55:07,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991213967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:07,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:07,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:55:07,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001875759] [2021-12-21 13:55:07,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:07,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:55:07,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:07,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:55:07,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:55:07,672 INFO L87 Difference]: Start difference. First operand 15895 states and 23654 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:08,879 INFO L93 Difference]: Finished difference Result 27467 states and 40894 transitions. [2021-12-21 13:55:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:08,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-12-21 13:55:08,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:08,896 INFO L225 Difference]: With dead ends: 27467 [2021-12-21 13:55:08,896 INFO L226 Difference]: Without dead ends: 11642 [2021-12-21 13:55:08,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:08,910 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 43 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:08,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1060 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11642 states. [2021-12-21 13:55:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11642 to 11642. [2021-12-21 13:55:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11642 states, 11641 states have (on average 1.4883601065200585) internal successors, (17326), 11641 states have internal predecessors, (17326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11642 states to 11642 states and 17326 transitions. [2021-12-21 13:55:10,177 INFO L78 Accepts]: Start accepts. Automaton has 11642 states and 17326 transitions. Word has length 115 [2021-12-21 13:55:10,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:10,177 INFO L470 AbstractCegarLoop]: Abstraction has 11642 states and 17326 transitions. [2021-12-21 13:55:10,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:10,177 INFO L276 IsEmpty]: Start isEmpty. Operand 11642 states and 17326 transitions. [2021-12-21 13:55:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-21 13:55:10,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:10,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:55:10,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 13:55:10,181 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:10,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:10,181 INFO L85 PathProgramCache]: Analyzing trace with hash -993915098, now seen corresponding path program 1 times [2021-12-21 13:55:10,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:10,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341906759] [2021-12-21 13:55:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:10,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:55:10,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:10,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341906759] [2021-12-21 13:55:10,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341906759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:10,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:10,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:55:10,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954690532] [2021-12-21 13:55:10,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:10,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:55:10,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:10,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:55:10,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:55:10,240 INFO L87 Difference]: Start difference. First operand 11642 states and 17326 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:11,634 INFO L93 Difference]: Finished difference Result 20313 states and 30222 transitions. [2021-12-21 13:55:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:11,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-12-21 13:55:11,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:11,647 INFO L225 Difference]: With dead ends: 20313 [2021-12-21 13:55:11,647 INFO L226 Difference]: Without dead ends: 11632 [2021-12-21 13:55:11,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:11,656 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 23 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:11,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1042 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11632 states. [2021-12-21 13:55:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11632 to 11632. [2021-12-21 13:55:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11632 states, 11631 states have (on average 1.4883500988736995) internal successors, (17311), 11631 states have internal predecessors, (17311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11632 states to 11632 states and 17311 transitions. [2021-12-21 13:55:12,885 INFO L78 Accepts]: Start accepts. Automaton has 11632 states and 17311 transitions. Word has length 120 [2021-12-21 13:55:12,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:12,886 INFO L470 AbstractCegarLoop]: Abstraction has 11632 states and 17311 transitions. [2021-12-21 13:55:12,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 11632 states and 17311 transitions. [2021-12-21 13:55:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-21 13:55:12,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:12,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:55:12,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 13:55:12,889 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1394285578, now seen corresponding path program 1 times [2021-12-21 13:55:12,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:12,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808349373] [2021-12-21 13:55:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:12,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:55:12,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:12,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808349373] [2021-12-21 13:55:12,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808349373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:12,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:12,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:55:12,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057984838] [2021-12-21 13:55:12,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:12,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:55:12,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:55:12,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:12,972 INFO L87 Difference]: Start difference. First operand 11632 states and 17311 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:14,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:14,224 INFO L93 Difference]: Finished difference Result 22352 states and 33242 transitions. [2021-12-21 13:55:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:14,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-12-21 13:55:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:14,241 INFO L225 Difference]: With dead ends: 22352 [2021-12-21 13:55:14,241 INFO L226 Difference]: Without dead ends: 10976 [2021-12-21 13:55:14,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:14,253 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 882 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:14,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 827 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10976 states. [2021-12-21 13:55:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10976 to 10819. [2021-12-21 13:55:15,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10819 states, 10818 states have (on average 1.4815122943242744) internal successors, (16027), 10818 states have internal predecessors, (16027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10819 states to 10819 states and 16027 transitions. [2021-12-21 13:55:15,485 INFO L78 Accepts]: Start accepts. Automaton has 10819 states and 16027 transitions. Word has length 120 [2021-12-21 13:55:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:15,486 INFO L470 AbstractCegarLoop]: Abstraction has 10819 states and 16027 transitions. [2021-12-21 13:55:15,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 10819 states and 16027 transitions. [2021-12-21 13:55:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-21 13:55:15,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:15,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:55:15,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 13:55:15,489 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:15,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:15,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1343086903, now seen corresponding path program 1 times [2021-12-21 13:55:15,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:15,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47233045] [2021-12-21 13:55:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:15,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:55:15,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:15,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47233045] [2021-12-21 13:55:15,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47233045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:15,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:15,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:55:15,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45721056] [2021-12-21 13:55:15,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:15,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:55:15,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:15,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:55:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:15,539 INFO L87 Difference]: Start difference. First operand 10819 states and 16027 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:16,813 INFO L93 Difference]: Finished difference Result 20408 states and 30668 transitions. [2021-12-21 13:55:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:55:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-21 13:55:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:16,829 INFO L225 Difference]: With dead ends: 20408 [2021-12-21 13:55:16,829 INFO L226 Difference]: Without dead ends: 10819 [2021-12-21 13:55:16,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:55:16,840 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 840 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:16,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 350 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:55:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10819 states. [2021-12-21 13:55:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10819 to 10819. [2021-12-21 13:55:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10819 states, 10818 states have (on average 1.4694952856350527) internal successors, (15897), 10818 states have internal predecessors, (15897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10819 states to 10819 states and 15897 transitions. [2021-12-21 13:55:18,128 INFO L78 Accepts]: Start accepts. Automaton has 10819 states and 15897 transitions. Word has length 122 [2021-12-21 13:55:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:18,128 INFO L470 AbstractCegarLoop]: Abstraction has 10819 states and 15897 transitions. [2021-12-21 13:55:18,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:18,128 INFO L276 IsEmpty]: Start isEmpty. Operand 10819 states and 15897 transitions. [2021-12-21 13:55:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-21 13:55:18,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:18,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:55:18,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 13:55:18,132 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1090994532, now seen corresponding path program 1 times [2021-12-21 13:55:18,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:18,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351929610] [2021-12-21 13:55:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:18,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:55:18,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:18,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351929610] [2021-12-21 13:55:18,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351929610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:18,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:18,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:55:18,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658363761] [2021-12-21 13:55:18,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:18,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:55:18,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:18,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:55:18,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:18,194 INFO L87 Difference]: Start difference. First operand 10819 states and 15897 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:19,529 INFO L93 Difference]: Finished difference Result 20628 states and 30690 transitions. [2021-12-21 13:55:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:55:19,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-21 13:55:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:19,547 INFO L225 Difference]: With dead ends: 20628 [2021-12-21 13:55:19,548 INFO L226 Difference]: Without dead ends: 10819 [2021-12-21 13:55:19,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:55:19,561 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 838 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:19,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 348 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:55:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10819 states. [2021-12-21 13:55:20,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10819 to 10819. [2021-12-21 13:55:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10819 states, 10818 states have (on average 1.457478276945831) internal successors, (15767), 10818 states have internal predecessors, (15767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10819 states to 10819 states and 15767 transitions. [2021-12-21 13:55:20,887 INFO L78 Accepts]: Start accepts. Automaton has 10819 states and 15767 transitions. Word has length 122 [2021-12-21 13:55:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:20,888 INFO L470 AbstractCegarLoop]: Abstraction has 10819 states and 15767 transitions. [2021-12-21 13:55:20,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 10819 states and 15767 transitions. [2021-12-21 13:55:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-21 13:55:20,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:20,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:55:20,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 13:55:20,891 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1423224191, now seen corresponding path program 1 times [2021-12-21 13:55:20,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:20,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428043710] [2021-12-21 13:55:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:20,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:55:21,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:21,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428043710] [2021-12-21 13:55:21,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428043710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:21,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:21,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:55:21,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077458887] [2021-12-21 13:55:21,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:21,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:55:21,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:21,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:55:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:55:21,021 INFO L87 Difference]: Start difference. First operand 10819 states and 15767 transitions. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:23,555 INFO L93 Difference]: Finished difference Result 29158 states and 43675 transitions. [2021-12-21 13:55:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:55:23,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-21 13:55:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:23,584 INFO L225 Difference]: With dead ends: 29158 [2021-12-21 13:55:23,584 INFO L226 Difference]: Without dead ends: 20026 [2021-12-21 13:55:23,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:55:23,597 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 743 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:23,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 859 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:55:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20026 states. [2021-12-21 13:55:26,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20026 to 20024. [2021-12-21 13:55:26,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20024 states, 20023 states have (on average 1.4824451880337612) internal successors, (29683), 20023 states have internal predecessors, (29683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20024 states to 20024 states and 29683 transitions. [2021-12-21 13:55:26,174 INFO L78 Accepts]: Start accepts. Automaton has 20024 states and 29683 transitions. Word has length 122 [2021-12-21 13:55:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:26,174 INFO L470 AbstractCegarLoop]: Abstraction has 20024 states and 29683 transitions. [2021-12-21 13:55:26,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 20024 states and 29683 transitions. [2021-12-21 13:55:26,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-21 13:55:26,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:26,178 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:55:26,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 13:55:26,178 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:26,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:26,179 INFO L85 PathProgramCache]: Analyzing trace with hash 249575419, now seen corresponding path program 1 times [2021-12-21 13:55:26,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:26,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753149155] [2021-12-21 13:55:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:26,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:55:26,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:26,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753149155] [2021-12-21 13:55:26,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753149155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:26,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:26,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:55:26,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674570683] [2021-12-21 13:55:26,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:26,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:55:26,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:26,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:55:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:55:26,277 INFO L87 Difference]: Start difference. First operand 20024 states and 29683 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:55:31,475 INFO L93 Difference]: Finished difference Result 54720 states and 82953 transitions. [2021-12-21 13:55:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:55:31,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-21 13:55:31,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:55:31,535 INFO L225 Difference]: With dead ends: 54720 [2021-12-21 13:55:31,535 INFO L226 Difference]: Without dead ends: 37372 [2021-12-21 13:55:31,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:55:31,554 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 350 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:55:31,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1103 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:55:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37372 states. [2021-12-21 13:55:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37372 to 37370. [2021-12-21 13:55:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37370 states, 37369 states have (on average 1.4834488479755947) internal successors, (55435), 37369 states have internal predecessors, (55435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37370 states to 37370 states and 55435 transitions. [2021-12-21 13:55:36,891 INFO L78 Accepts]: Start accepts. Automaton has 37370 states and 55435 transitions. Word has length 122 [2021-12-21 13:55:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:55:36,891 INFO L470 AbstractCegarLoop]: Abstraction has 37370 states and 55435 transitions. [2021-12-21 13:55:36,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:55:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 37370 states and 55435 transitions. [2021-12-21 13:55:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-21 13:55:36,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:55:36,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:55:36,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 13:55:36,895 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:55:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:55:36,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1986267249, now seen corresponding path program 1 times [2021-12-21 13:55:36,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:55:36,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100239155] [2021-12-21 13:55:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:55:36,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:55:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:55:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:55:37,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:55:37,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100239155] [2021-12-21 13:55:37,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100239155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:55:37,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:55:37,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-21 13:55:37,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267940383] [2021-12-21 13:55:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:55:37,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 13:55:37,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:55:37,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 13:55:37,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-12-21 13:55:37,540 INFO L87 Difference]: Start difference. First operand 37370 states and 55435 transitions. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)