./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.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/pals_floodmax.3.1.ufo.UNBOUNDED.pals.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 8ec94212d42d56ec4ec8ccfb1876cba582c3e983611a6a88d38f3b3edc8b85b6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:26:22,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:26:22,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:26:22,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:26:22,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:26:22,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:26:22,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:26:22,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:26:22,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:26:22,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:26:22,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:26:22,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:26:22,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:26:22,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:26:22,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:26:22,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:26:22,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:26:22,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:26:22,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:26:22,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:26:22,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:26:22,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:26:22,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:26:22,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:26:22,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:26:22,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:26:22,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:26:22,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:26:22,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:26:22,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:26:22,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:26:22,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:26:22,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:26:22,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:26:22,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:26:22,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:26:22,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:26:22,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:26:22,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:26:22,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:26:22,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:26:22,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:26:22,384 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:26:22,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:26:22,385 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:26:22,385 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:26:22,386 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:26:22,386 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:26:22,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:26:22,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:26:22,387 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:26:22,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:26:22,388 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:26:22,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:26:22,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:26:22,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:26:22,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:26:22,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:26:22,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:26:22,389 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:26:22,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:26:22,389 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:26:22,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:26:22,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:26:22,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:26:22,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:26:22,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:26:22,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:26:22,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:26:22,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:26:22,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:26:22,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:26:22,392 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:26:22,392 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:26:22,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:26:22,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:26:22,392 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ec94212d42d56ec4ec8ccfb1876cba582c3e983611a6a88d38f3b3edc8b85b6 [2021-12-21 13:26:22,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:26:22,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:26:22,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:26:22,605 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:26:22,605 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:26:22,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-12-21 13:26:22,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61beb69cb/8a2f002984304022968b5456291b33b9/FLAG2c161c7f3 [2021-12-21 13:26:23,055 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:26:23,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-12-21 13:26:23,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61beb69cb/8a2f002984304022968b5456291b33b9/FLAG2c161c7f3 [2021-12-21 13:26:23,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61beb69cb/8a2f002984304022968b5456291b33b9 [2021-12-21 13:26:23,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:26:23,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:26:23,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:26:23,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:26:23,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:26:23,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78330d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23, skipping insertion in model container [2021-12-21 13:26:23,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:26:23,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:26:23,280 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/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c[11552,11565] [2021-12-21 13:26:23,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:26:23,288 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:26:23,324 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/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c[11552,11565] [2021-12-21 13:26:23,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:26:23,333 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:26:23,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23 WrapperNode [2021-12-21 13:26:23,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:26:23,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:26:23,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:26:23,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:26:23,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,372 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 431 [2021-12-21 13:26:23,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:26:23,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:26:23,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:26:23,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:26:23,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:26:23,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:26:23,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:26:23,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:26:23,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23" (1/1) ... [2021-12-21 13:26:23,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:26:23,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:23,482 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 13:26:23,483 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 13:26:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:26:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:26:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:26:23,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:26:23,583 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:26:23,584 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:26:23,971 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:26:23,980 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:26:23,981 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 13:26:23,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:26:23 BoogieIcfgContainer [2021-12-21 13:26:23,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:26:23,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:26:23,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:26:23,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:26:23,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:26:23" (1/3) ... [2021-12-21 13:26:23,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107f62f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:26:23, skipping insertion in model container [2021-12-21 13:26:23,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:26:23" (2/3) ... [2021-12-21 13:26:23,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107f62f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:26:23, skipping insertion in model container [2021-12-21 13:26:23,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:26:23" (3/3) ... [2021-12-21 13:26:23,990 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-12-21 13:26:23,994 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:26:23,994 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:26:24,035 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:26:24,041 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 13:26:24,041 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:26:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7364341085271318) internal successors, (224), 130 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:26:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 13:26:24,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:24,069 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] [2021-12-21 13:26:24,069 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:24,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1238377303, now seen corresponding path program 1 times [2021-12-21 13:26:24,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:24,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380947583] [2021-12-21 13:26:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:24,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:24,262 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 13:26:24,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:24,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380947583] [2021-12-21 13:26:24,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380947583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:24,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:24,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 13:26:24,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887140119] [2021-12-21 13:26:24,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:24,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 13:26:24,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:24,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 13:26:24,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:26:24,300 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7364341085271318) internal successors, (224), 130 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 13:26:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:24,334 INFO L93 Difference]: Finished difference Result 208 states and 355 transitions. [2021-12-21 13:26:24,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 13:26:24,336 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-21 13:26:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:24,344 INFO L225 Difference]: With dead ends: 208 [2021-12-21 13:26:24,344 INFO L226 Difference]: Without dead ends: 127 [2021-12-21 13:26:24,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:26:24,352 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:24,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-21 13:26:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-21 13:26:24,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.7222222222222223) internal successors, (217), 126 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:26:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 217 transitions. [2021-12-21 13:26:24,381 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 217 transitions. Word has length 37 [2021-12-21 13:26:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:24,382 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 217 transitions. [2021-12-21 13:26:24,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 13:26:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 217 transitions. [2021-12-21 13:26:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 13:26:24,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:24,384 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] [2021-12-21 13:26:24,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:26:24,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:24,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:24,385 INFO L85 PathProgramCache]: Analyzing trace with hash 420728853, now seen corresponding path program 1 times [2021-12-21 13:26:24,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:24,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979366998] [2021-12-21 13:26:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:24,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:24,482 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 13:26:24,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:24,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979366998] [2021-12-21 13:26:24,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979366998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:24,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:24,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:24,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994550745] [2021-12-21 13:26:24,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:24,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:24,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:24,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:24,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:24,485 INFO L87 Difference]: Start difference. First operand 127 states and 217 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 13:26:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:24,549 INFO L93 Difference]: Finished difference Result 207 states and 348 transitions. [2021-12-21 13:26:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:24,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-21 13:26:24,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:24,551 INFO L225 Difference]: With dead ends: 207 [2021-12-21 13:26:24,551 INFO L226 Difference]: Without dead ends: 127 [2021-12-21 13:26:24,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:26:24,553 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 3 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:24,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 836 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-21 13:26:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-21 13:26:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5555555555555556) internal successors, (196), 126 states have internal predecessors, (196), 0 states have call successors, (0), 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 13:26:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 196 transitions. [2021-12-21 13:26:24,564 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 196 transitions. Word has length 37 [2021-12-21 13:26:24,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:24,564 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 196 transitions. [2021-12-21 13:26:24,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 13:26:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 196 transitions. [2021-12-21 13:26:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 13:26:24,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:24,567 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] [2021-12-21 13:26:24,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:26:24,569 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1846122567, now seen corresponding path program 1 times [2021-12-21 13:26:24,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:24,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312202422] [2021-12-21 13:26:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:24,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:24,662 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 13:26:24,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:24,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312202422] [2021-12-21 13:26:24,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312202422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:24,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:24,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:26:24,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132702009] [2021-12-21 13:26:24,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:24,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:26:24,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:24,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:26:24,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:26:24,666 INFO L87 Difference]: Start difference. First operand 127 states and 196 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 13:26:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:24,720 INFO L93 Difference]: Finished difference Result 270 states and 433 transitions. [2021-12-21 13:26:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:26:24,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-21 13:26:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:24,722 INFO L225 Difference]: With dead ends: 270 [2021-12-21 13:26:24,722 INFO L226 Difference]: Without dead ends: 194 [2021-12-21 13:26:24,722 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 13:26:24,723 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 101 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:24,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 349 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:24,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-21 13:26:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-12-21 13:26:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.568421052631579) internal successors, (298), 190 states have internal predecessors, (298), 0 states have call successors, (0), 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 13:26:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 298 transitions. [2021-12-21 13:26:24,745 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 298 transitions. Word has length 57 [2021-12-21 13:26:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:24,746 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 298 transitions. [2021-12-21 13:26:24,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 13:26:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 298 transitions. [2021-12-21 13:26:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 13:26:24,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:24,747 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] [2021-12-21 13:26:24,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:26:24,748 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1343531320, now seen corresponding path program 1 times [2021-12-21 13:26:24,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:24,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937923176] [2021-12-21 13:26:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:24,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:24,841 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 13:26:24,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:24,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937923176] [2021-12-21 13:26:24,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937923176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:24,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:24,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:26:24,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612390914] [2021-12-21 13:26:24,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:24,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:26:24,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:24,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:26:24,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:26:24,845 INFO L87 Difference]: Start difference. First operand 191 states and 298 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 13:26:24,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:24,879 INFO L93 Difference]: Finished difference Result 457 states and 730 transitions. [2021-12-21 13:26:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:26:24,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-21 13:26:24,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:24,882 INFO L225 Difference]: With dead ends: 457 [2021-12-21 13:26:24,883 INFO L226 Difference]: Without dead ends: 317 [2021-12-21 13:26:24,884 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 13:26:24,886 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:24,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 362 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-21 13:26:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 313. [2021-12-21 13:26:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.5833333333333333) internal successors, (494), 312 states have internal predecessors, (494), 0 states have call successors, (0), 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 13:26:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 494 transitions. [2021-12-21 13:26:24,908 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 494 transitions. Word has length 59 [2021-12-21 13:26:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:24,909 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 494 transitions. [2021-12-21 13:26:24,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 13:26:24,909 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 494 transitions. [2021-12-21 13:26:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 13:26:24,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:24,910 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] [2021-12-21 13:26:24,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:26:24,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1628241783, now seen corresponding path program 1 times [2021-12-21 13:26:24,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:24,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121891945] [2021-12-21 13:26:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:24,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:24,970 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 13:26:24,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:24,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121891945] [2021-12-21 13:26:24,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121891945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:24,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:24,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:26:24,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987129944] [2021-12-21 13:26:24,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:24,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:26:24,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:24,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:26:24,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:26:24,972 INFO L87 Difference]: Start difference. First operand 313 states and 494 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 13:26:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:24,997 INFO L93 Difference]: Finished difference Result 809 states and 1292 transitions. [2021-12-21 13:26:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:26:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-12-21 13:26:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:24,999 INFO L225 Difference]: With dead ends: 809 [2021-12-21 13:26:24,999 INFO L226 Difference]: Without dead ends: 547 [2021-12-21 13:26:25,012 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 13:26:25,013 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 97 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:25,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 363 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-12-21 13:26:25,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 541. [2021-12-21 13:26:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.5814814814814815) internal successors, (854), 540 states have internal predecessors, (854), 0 states have call successors, (0), 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 13:26:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 854 transitions. [2021-12-21 13:26:25,034 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 854 transitions. Word has length 61 [2021-12-21 13:26:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:25,035 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 854 transitions. [2021-12-21 13:26:25,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 13:26:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 854 transitions. [2021-12-21 13:26:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 13:26:25,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:25,036 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] [2021-12-21 13:26:25,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:26:25,037 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:25,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:25,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1563109830, now seen corresponding path program 1 times [2021-12-21 13:26:25,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:25,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167814580] [2021-12-21 13:26:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:25,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,083 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 13:26:25,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:25,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167814580] [2021-12-21 13:26:25,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167814580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:25,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:25,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:25,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266371526] [2021-12-21 13:26:25,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:25,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:25,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:25,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:25,085 INFO L87 Difference]: Start difference. First operand 541 states and 854 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 13:26:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:25,217 INFO L93 Difference]: Finished difference Result 2333 states and 3776 transitions. [2021-12-21 13:26:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:26:25,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-21 13:26:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:25,224 INFO L225 Difference]: With dead ends: 2333 [2021-12-21 13:26:25,224 INFO L226 Difference]: Without dead ends: 1843 [2021-12-21 13:26:25,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:26:25,227 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 828 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:25,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 1143 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:26:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2021-12-21 13:26:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 969. [2021-12-21 13:26:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 1.5919421487603307) internal successors, (1541), 968 states have internal predecessors, (1541), 0 states have call successors, (0), 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 13:26:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1541 transitions. [2021-12-21 13:26:25,294 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1541 transitions. Word has length 63 [2021-12-21 13:26:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:25,295 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1541 transitions. [2021-12-21 13:26:25,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 13:26:25,296 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1541 transitions. [2021-12-21 13:26:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 13:26:25,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:25,299 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] [2021-12-21 13:26:25,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:26:25,299 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:25,301 INFO L85 PathProgramCache]: Analyzing trace with hash -711068186, now seen corresponding path program 1 times [2021-12-21 13:26:25,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:25,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373134888] [2021-12-21 13:26:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:25,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,376 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 13:26:25,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:25,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373134888] [2021-12-21 13:26:25,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373134888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:25,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:25,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:26:25,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565316333] [2021-12-21 13:26:25,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:25,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:26:25,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:25,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:26:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:26:25,378 INFO L87 Difference]: Start difference. First operand 969 states and 1541 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:26:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:25,463 INFO L93 Difference]: Finished difference Result 2831 states and 4571 transitions. [2021-12-21 13:26:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:26:25,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-21 13:26:25,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:25,471 INFO L225 Difference]: With dead ends: 2831 [2021-12-21 13:26:25,471 INFO L226 Difference]: Without dead ends: 1913 [2021-12-21 13:26:25,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 13:26:25,473 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 363 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:25,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 644 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-12-21 13:26:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1432. [2021-12-21 13:26:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 1.6009783368273933) internal successors, (2291), 1431 states have internal predecessors, (2291), 0 states have call successors, (0), 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 13:26:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2291 transitions. [2021-12-21 13:26:25,525 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2291 transitions. Word has length 64 [2021-12-21 13:26:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:25,526 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2291 transitions. [2021-12-21 13:26:25,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:26:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2291 transitions. [2021-12-21 13:26:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 13:26:25,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:25,528 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] [2021-12-21 13:26:25,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:26:25,528 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:25,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1972861693, now seen corresponding path program 1 times [2021-12-21 13:26:25,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:25,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691937461] [2021-12-21 13:26:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:25,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,585 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 13:26:25,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:25,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691937461] [2021-12-21 13:26:25,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691937461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:25,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:25,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:26:25,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577440161] [2021-12-21 13:26:25,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:25,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:26:25,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:25,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:26:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:26:25,587 INFO L87 Difference]: Start difference. First operand 1432 states and 2291 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 13:26:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:25,686 INFO L93 Difference]: Finished difference Result 4159 states and 6709 transitions. [2021-12-21 13:26:25,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:26:25,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-21 13:26:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:25,694 INFO L225 Difference]: With dead ends: 4159 [2021-12-21 13:26:25,694 INFO L226 Difference]: Without dead ends: 2778 [2021-12-21 13:26:25,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 13:26:25,697 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 363 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:25,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 643 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-12-21 13:26:25,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2093. [2021-12-21 13:26:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2092 states have (on average 1.6003824091778203) internal successors, (3348), 2092 states have internal predecessors, (3348), 0 states have call successors, (0), 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 13:26:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 3348 transitions. [2021-12-21 13:26:25,775 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 3348 transitions. Word has length 65 [2021-12-21 13:26:25,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:25,776 INFO L470 AbstractCegarLoop]: Abstraction has 2093 states and 3348 transitions. [2021-12-21 13:26:25,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 13:26:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 3348 transitions. [2021-12-21 13:26:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 13:26:25,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:25,777 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] [2021-12-21 13:26:25,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:26:25,781 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:25,781 INFO L85 PathProgramCache]: Analyzing trace with hash -555653635, now seen corresponding path program 1 times [2021-12-21 13:26:25,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:25,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506622128] [2021-12-21 13:26:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:25,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,826 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 13:26:25,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:25,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506622128] [2021-12-21 13:26:25,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506622128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:25,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:25,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:26:25,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960339692] [2021-12-21 13:26:25,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:25,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:26:25,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:25,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:26:25,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:26:25,828 INFO L87 Difference]: Start difference. First operand 2093 states and 3348 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:26:25,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:25,953 INFO L93 Difference]: Finished difference Result 6043 states and 9733 transitions. [2021-12-21 13:26:25,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:26:25,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-21 13:26:25,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:25,964 INFO L225 Difference]: With dead ends: 6043 [2021-12-21 13:26:25,964 INFO L226 Difference]: Without dead ends: 4001 [2021-12-21 13:26:25,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 13:26:25,970 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 361 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:25,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 652 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-12-21 13:26:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3031. [2021-12-21 13:26:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3030 states have (on average 1.5986798679867986) internal successors, (4844), 3030 states have internal predecessors, (4844), 0 states have call successors, (0), 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 13:26:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 4844 transitions. [2021-12-21 13:26:26,082 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 4844 transitions. Word has length 66 [2021-12-21 13:26:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:26,082 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 4844 transitions. [2021-12-21 13:26:26,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:26:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 4844 transitions. [2021-12-21 13:26:26,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 13:26:26,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:26,084 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] [2021-12-21 13:26:26,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:26:26,084 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:26,085 INFO L85 PathProgramCache]: Analyzing trace with hash -378063148, now seen corresponding path program 1 times [2021-12-21 13:26:26,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:26,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089723352] [2021-12-21 13:26:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:26,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:26,122 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 13:26:26,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:26,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089723352] [2021-12-21 13:26:26,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089723352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:26,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:26,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:26:26,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663327460] [2021-12-21 13:26:26,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:26,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:26:26,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:26,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:26:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:26:26,124 INFO L87 Difference]: Start difference. First operand 3031 states and 4844 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:26:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:26,239 INFO L93 Difference]: Finished difference Result 6926 states and 11080 transitions. [2021-12-21 13:26:26,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:26:26,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-21 13:26:26,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:26,251 INFO L225 Difference]: With dead ends: 6926 [2021-12-21 13:26:26,251 INFO L226 Difference]: Without dead ends: 4772 [2021-12-21 13:26:26,252 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 13:26:26,253 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 96 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:26,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 402 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-12-21 13:26:26,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 4770. [2021-12-21 13:26:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4769 states have (on average 1.5848186202558188) internal successors, (7558), 4769 states have internal predecessors, (7558), 0 states have call successors, (0), 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 13:26:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 7558 transitions. [2021-12-21 13:26:26,480 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 7558 transitions. Word has length 66 [2021-12-21 13:26:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:26,481 INFO L470 AbstractCegarLoop]: Abstraction has 4770 states and 7558 transitions. [2021-12-21 13:26:26,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:26:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 7558 transitions. [2021-12-21 13:26:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 13:26:26,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:26,495 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] [2021-12-21 13:26:26,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:26:26,496 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1715532573, now seen corresponding path program 1 times [2021-12-21 13:26:26,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:26,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294246279] [2021-12-21 13:26:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:26,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:26,534 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 13:26:26,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:26,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294246279] [2021-12-21 13:26:26,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294246279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:26,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:26,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:26:26,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376453893] [2021-12-21 13:26:26,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:26,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:26:26,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:26:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:26:26,536 INFO L87 Difference]: Start difference. First operand 4770 states and 7558 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:26:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:26,797 INFO L93 Difference]: Finished difference Result 10466 states and 16644 transitions. [2021-12-21 13:26:26,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:26:26,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-21 13:26:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:26,815 INFO L225 Difference]: With dead ends: 10466 [2021-12-21 13:26:26,816 INFO L226 Difference]: Without dead ends: 7109 [2021-12-21 13:26:26,838 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 13:26:26,839 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 102 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:26,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 431 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7109 states. [2021-12-21 13:26:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7109 to 7107. [2021-12-21 13:26:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 1.5757106670419363) internal successors, (11197), 7106 states have internal predecessors, (11197), 0 states have call successors, (0), 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 13:26:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 11197 transitions. [2021-12-21 13:26:27,104 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 11197 transitions. Word has length 66 [2021-12-21 13:26:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:27,104 INFO L470 AbstractCegarLoop]: Abstraction has 7107 states and 11197 transitions. [2021-12-21 13:26:27,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:26:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 11197 transitions. [2021-12-21 13:26:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 13:26:27,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:27,106 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] [2021-12-21 13:26:27,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:26:27,106 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:27,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:27,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1204542386, now seen corresponding path program 1 times [2021-12-21 13:26:27,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:27,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968415849] [2021-12-21 13:26:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:27,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:27,133 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 13:26:27,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:27,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968415849] [2021-12-21 13:26:27,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968415849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:27,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:27,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:26:27,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018858375] [2021-12-21 13:26:27,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:27,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:26:27,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:27,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:26:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:26:27,135 INFO L87 Difference]: Start difference. First operand 7107 states and 11197 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:26:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:27,399 INFO L93 Difference]: Finished difference Result 15863 states and 25260 transitions. [2021-12-21 13:26:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:26:27,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-21 13:26:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:27,422 INFO L225 Difference]: With dead ends: 15863 [2021-12-21 13:26:27,422 INFO L226 Difference]: Without dead ends: 10685 [2021-12-21 13:26:27,428 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 13:26:27,429 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 108 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:27,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 452 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2021-12-21 13:26:27,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 10683. [2021-12-21 13:26:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10683 states, 10682 states have (on average 1.5719902639955066) internal successors, (16792), 10682 states have internal predecessors, (16792), 0 states have call successors, (0), 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 13:26:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10683 states to 10683 states and 16792 transitions. [2021-12-21 13:26:27,818 INFO L78 Accepts]: Start accepts. Automaton has 10683 states and 16792 transitions. Word has length 66 [2021-12-21 13:26:27,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:27,818 INFO L470 AbstractCegarLoop]: Abstraction has 10683 states and 16792 transitions. [2021-12-21 13:26:27,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:26:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 10683 states and 16792 transitions. [2021-12-21 13:26:27,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 13:26:27,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:27,819 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] [2021-12-21 13:26:27,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:26:27,820 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:27,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash 760246741, now seen corresponding path program 1 times [2021-12-21 13:26:27,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:27,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833189351] [2021-12-21 13:26:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:27,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:27,918 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 13:26:27,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:27,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833189351] [2021-12-21 13:26:27,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833189351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:27,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:27,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:27,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214212181] [2021-12-21 13:26:27,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:27,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:27,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:27,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:27,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:27,920 INFO L87 Difference]: Start difference. First operand 10683 states and 16792 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 13:26:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:28,326 INFO L93 Difference]: Finished difference Result 21295 states and 33486 transitions. [2021-12-21 13:26:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:28,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-21 13:26:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:28,342 INFO L225 Difference]: With dead ends: 21295 [2021-12-21 13:26:28,342 INFO L226 Difference]: Without dead ends: 10685 [2021-12-21 13:26:28,352 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 13:26:28,353 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 362 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:28,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 526 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:28,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2021-12-21 13:26:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 10683. [2021-12-21 13:26:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10683 states, 10682 states have (on average 1.5602883355176933) internal successors, (16667), 10682 states have internal predecessors, (16667), 0 states have call successors, (0), 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 13:26:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10683 states to 10683 states and 16667 transitions. [2021-12-21 13:26:28,743 INFO L78 Accepts]: Start accepts. Automaton has 10683 states and 16667 transitions. Word has length 68 [2021-12-21 13:26:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:28,744 INFO L470 AbstractCegarLoop]: Abstraction has 10683 states and 16667 transitions. [2021-12-21 13:26:28,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 13:26:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 10683 states and 16667 transitions. [2021-12-21 13:26:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 13:26:28,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:28,745 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] [2021-12-21 13:26:28,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:26:28,745 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:28,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1443931136, now seen corresponding path program 1 times [2021-12-21 13:26:28,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:28,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692364975] [2021-12-21 13:26:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:28,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:28,823 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 13:26:28,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:28,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692364975] [2021-12-21 13:26:28,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692364975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:28,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:28,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:28,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536249901] [2021-12-21 13:26:28,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:28,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:28,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:28,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:28,825 INFO L87 Difference]: Start difference. First operand 10683 states and 16667 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 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 13:26:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:29,404 INFO L93 Difference]: Finished difference Result 30609 states and 47906 transitions. [2021-12-21 13:26:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:29,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-21 13:26:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:29,482 INFO L225 Difference]: With dead ends: 30609 [2021-12-21 13:26:29,482 INFO L226 Difference]: Without dead ends: 19999 [2021-12-21 13:26:29,494 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 13:26:29,494 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 356 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:29,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 528 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19999 states. [2021-12-21 13:26:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19999 to 19997. [2021-12-21 13:26:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19997 states, 19996 states have (on average 1.5477095419083817) internal successors, (30948), 19996 states have internal predecessors, (30948), 0 states have call successors, (0), 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 13:26:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19997 states to 19997 states and 30948 transitions. [2021-12-21 13:26:30,295 INFO L78 Accepts]: Start accepts. Automaton has 19997 states and 30948 transitions. Word has length 71 [2021-12-21 13:26:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:30,295 INFO L470 AbstractCegarLoop]: Abstraction has 19997 states and 30948 transitions. [2021-12-21 13:26:30,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 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 13:26:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 19997 states and 30948 transitions. [2021-12-21 13:26:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 13:26:30,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:30,296 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] [2021-12-21 13:26:30,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:26:30,297 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:30,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:30,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2054199358, now seen corresponding path program 1 times [2021-12-21 13:26:30,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:30,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108297141] [2021-12-21 13:26:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:30,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,344 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 13:26:30,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:30,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108297141] [2021-12-21 13:26:30,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108297141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:30,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:30,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:30,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451724675] [2021-12-21 13:26:30,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:30,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:30,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:30,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:30,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:30,346 INFO L87 Difference]: Start difference. First operand 19997 states and 30948 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 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 13:26:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:31,428 INFO L93 Difference]: Finished difference Result 39185 states and 60002 transitions. [2021-12-21 13:26:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:26:31,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-21 13:26:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:31,488 INFO L225 Difference]: With dead ends: 39185 [2021-12-21 13:26:31,489 INFO L226 Difference]: Without dead ends: 39183 [2021-12-21 13:26:31,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:26:31,497 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 323 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:31,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 842 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39183 states. [2021-12-21 13:26:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39183 to 21083. [2021-12-21 13:26:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21083 states, 21082 states have (on average 1.5190683995825822) internal successors, (32025), 21082 states have internal predecessors, (32025), 0 states have call successors, (0), 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 13:26:32,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21083 states to 21083 states and 32025 transitions. [2021-12-21 13:26:32,356 INFO L78 Accepts]: Start accepts. Automaton has 21083 states and 32025 transitions. Word has length 72 [2021-12-21 13:26:32,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:32,357 INFO L470 AbstractCegarLoop]: Abstraction has 21083 states and 32025 transitions. [2021-12-21 13:26:32,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 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 13:26:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 21083 states and 32025 transitions. [2021-12-21 13:26:32,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 13:26:32,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:32,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:32,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:26:32,361 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:32,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:32,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1220786708, now seen corresponding path program 1 times [2021-12-21 13:26:32,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:32,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264014574] [2021-12-21 13:26:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:32,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 13:26:32,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:32,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264014574] [2021-12-21 13:26:32,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264014574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:32,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:32,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:32,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689985695] [2021-12-21 13:26:32,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:32,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:32,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:32,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:32,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:32,412 INFO L87 Difference]: Start difference. First operand 21083 states and 32025 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 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 13:26:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:33,886 INFO L93 Difference]: Finished difference Result 51593 states and 78687 transitions. [2021-12-21 13:26:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:33,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 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 99 [2021-12-21 13:26:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:33,970 INFO L225 Difference]: With dead ends: 51593 [2021-12-21 13:26:33,970 INFO L226 Difference]: Without dead ends: 41591 [2021-12-21 13:26:33,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:26:33,995 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 463 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:33,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 822 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41591 states. [2021-12-21 13:26:35,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41591 to 32423. [2021-12-21 13:26:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32423 states, 32422 states have (on average 1.518074147184011) internal successors, (49219), 32422 states have internal predecessors, (49219), 0 states have call successors, (0), 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 13:26:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32423 states to 32423 states and 49219 transitions. [2021-12-21 13:26:35,379 INFO L78 Accepts]: Start accepts. Automaton has 32423 states and 49219 transitions. Word has length 99 [2021-12-21 13:26:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:35,379 INFO L470 AbstractCegarLoop]: Abstraction has 32423 states and 49219 transitions. [2021-12-21 13:26:35,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 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 13:26:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 32423 states and 49219 transitions. [2021-12-21 13:26:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 13:26:35,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:35,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:35,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:26:35,382 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:35,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1736711163, now seen corresponding path program 1 times [2021-12-21 13:26:35,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:35,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878506768] [2021-12-21 13:26:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:35,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:26:35,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:35,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878506768] [2021-12-21 13:26:35,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878506768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:35,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:35,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:35,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586482577] [2021-12-21 13:26:35,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:35,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:35,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:35,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:35,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:35,443 INFO L87 Difference]: Start difference. First operand 32423 states and 49219 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 13:26:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:36,898 INFO L93 Difference]: Finished difference Result 55601 states and 84823 transitions. [2021-12-21 13:26:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 99 [2021-12-21 13:26:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:36,967 INFO L225 Difference]: With dead ends: 55601 [2021-12-21 13:26:36,968 INFO L226 Difference]: Without dead ends: 45599 [2021-12-21 13:26:36,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:26:36,990 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 454 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:36,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 942 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:26:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45599 states. [2021-12-21 13:26:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45599 to 43945. [2021-12-21 13:26:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43945 states, 43944 states have (on average 1.519229018751138) internal successors, (66761), 43944 states have internal predecessors, (66761), 0 states have call successors, (0), 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 13:26:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43945 states to 43945 states and 66761 transitions. [2021-12-21 13:26:38,785 INFO L78 Accepts]: Start accepts. Automaton has 43945 states and 66761 transitions. Word has length 99 [2021-12-21 13:26:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:38,786 INFO L470 AbstractCegarLoop]: Abstraction has 43945 states and 66761 transitions. [2021-12-21 13:26:38,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 13:26:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 43945 states and 66761 transitions. [2021-12-21 13:26:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 13:26:38,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:38,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:38,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 13:26:38,788 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash 361818826, now seen corresponding path program 1 times [2021-12-21 13:26:38,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:38,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949493928] [2021-12-21 13:26:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:38,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:26:38,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:38,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949493928] [2021-12-21 13:26:38,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949493928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:38,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:38,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:38,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862282880] [2021-12-21 13:26:38,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:38,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:38,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:38,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:38,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:38,831 INFO L87 Difference]: Start difference. First operand 43945 states and 66761 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 13:26:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:40,792 INFO L93 Difference]: Finished difference Result 62437 states and 95433 transitions. [2021-12-21 13:26:40,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:40,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 99 [2021-12-21 13:26:40,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:40,873 INFO L225 Difference]: With dead ends: 62437 [2021-12-21 13:26:40,873 INFO L226 Difference]: Without dead ends: 52175 [2021-12-21 13:26:40,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:26:40,893 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 454 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:40,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 891 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52175 states. [2021-12-21 13:26:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52175 to 50521. [2021-12-21 13:26:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50521 states, 50520 states have (on average 1.5221892319873318) internal successors, (76901), 50520 states have internal predecessors, (76901), 0 states have call successors, (0), 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 13:26:43,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50521 states to 50521 states and 76901 transitions. [2021-12-21 13:26:43,013 INFO L78 Accepts]: Start accepts. Automaton has 50521 states and 76901 transitions. Word has length 99 [2021-12-21 13:26:43,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:43,013 INFO L470 AbstractCegarLoop]: Abstraction has 50521 states and 76901 transitions. [2021-12-21 13:26:43,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 13:26:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 50521 states and 76901 transitions. [2021-12-21 13:26:43,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-21 13:26:43,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:43,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:43,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 13:26:43,016 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:43,016 INFO L85 PathProgramCache]: Analyzing trace with hash 703616354, now seen corresponding path program 1 times [2021-12-21 13:26:43,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:43,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80704614] [2021-12-21 13:26:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:43,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:26:43,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80704614] [2021-12-21 13:26:43,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80704614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:43,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:43,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:26:43,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986194942] [2021-12-21 13:26:43,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:43,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:26:43,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:43,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:26:43,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:26:43,057 INFO L87 Difference]: Start difference. First operand 50521 states and 76901 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 13:26:45,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:45,541 INFO L93 Difference]: Finished difference Result 82494 states and 126290 transitions. [2021-12-21 13:26:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:26:45,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 100 [2021-12-21 13:26:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:45,627 INFO L225 Difference]: With dead ends: 82494 [2021-12-21 13:26:45,628 INFO L226 Difference]: Without dead ends: 65656 [2021-12-21 13:26:45,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:26:45,644 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 195 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:45,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 664 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:45,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65656 states. [2021-12-21 13:26:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65656 to 64004. [2021-12-21 13:26:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64004 states, 64003 states have (on average 1.5227254972423168) internal successors, (97459), 64003 states have internal predecessors, (97459), 0 states have call successors, (0), 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 13:26:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64004 states to 64004 states and 97459 transitions. [2021-12-21 13:26:48,106 INFO L78 Accepts]: Start accepts. Automaton has 64004 states and 97459 transitions. Word has length 100 [2021-12-21 13:26:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:48,107 INFO L470 AbstractCegarLoop]: Abstraction has 64004 states and 97459 transitions. [2021-12-21 13:26:48,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 13:26:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 64004 states and 97459 transitions. [2021-12-21 13:26:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-21 13:26:48,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:48,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:48,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 13:26:48,109 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:48,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1126318180, now seen corresponding path program 1 times [2021-12-21 13:26:48,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:48,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5792937] [2021-12-21 13:26:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:48,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:26:48,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:48,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5792937] [2021-12-21 13:26:48,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5792937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:48,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:48,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:26:48,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412971538] [2021-12-21 13:26:48,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:48,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:26:48,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:48,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:26:48,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:26:48,139 INFO L87 Difference]: Start difference. First operand 64004 states and 97459 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 13:26:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:51,984 INFO L93 Difference]: Finished difference Result 138461 states and 211669 transitions. [2021-12-21 13:26:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:26:51,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 100 [2021-12-21 13:26:51,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:52,153 INFO L225 Difference]: With dead ends: 138461 [2021-12-21 13:26:52,153 INFO L226 Difference]: Without dead ends: 108269 [2021-12-21 13:26:52,183 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 13:26:52,186 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 85 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:52,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 355 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108269 states. [2021-12-21 13:26:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108269 to 107991. [2021-12-21 13:26:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107991 states, 107990 states have (on average 1.5230299101768683) internal successors, (164472), 107990 states have internal predecessors, (164472), 0 states have call successors, (0), 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 13:26:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107991 states to 107991 states and 164472 transitions. [2021-12-21 13:26:56,867 INFO L78 Accepts]: Start accepts. Automaton has 107991 states and 164472 transitions. Word has length 100 [2021-12-21 13:26:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:56,867 INFO L470 AbstractCegarLoop]: Abstraction has 107991 states and 164472 transitions. [2021-12-21 13:26:56,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 13:26:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 107991 states and 164472 transitions. [2021-12-21 13:26:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-21 13:26:56,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:56,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:56,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 13:26:56,870 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1300018162, now seen corresponding path program 1 times [2021-12-21 13:26:56,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:56,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149852826] [2021-12-21 13:26:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:56,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:26:56,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:56,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149852826] [2021-12-21 13:26:56,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149852826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:56,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:56,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:26:56,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089922747] [2021-12-21 13:26:56,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:56,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:26:56,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:26:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:26:56,903 INFO L87 Difference]: Start difference. First operand 107991 states and 164472 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 13:27:01,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:01,682 INFO L93 Difference]: Finished difference Result 165344 states and 252841 transitions. [2021-12-21 13:27:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:27:01,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 13:27:01,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:01,953 INFO L225 Difference]: With dead ends: 165344 [2021-12-21 13:27:01,953 INFO L226 Difference]: Without dead ends: 134094 [2021-12-21 13:27:02,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:27:02,001 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 203 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:02,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 604 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:02,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134094 states.