./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.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_lcr-var-start-time.5.2.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 ab4ce27c037a23a1acb050e4e5e47861985f2a45717e88488eff45dc32b3cf64 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:29:03,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:29:03,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:29:03,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:29:03,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:29:03,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:29:03,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:29:03,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:29:03,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:29:03,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:29:03,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:29:03,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:29:03,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:29:03,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:29:03,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:29:03,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:29:03,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:29:03,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:29:03,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:29:03,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:29:03,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:29:03,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:29:03,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:29:03,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:29:03,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:29:03,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:29:03,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:29:03,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:29:03,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:29:03,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:29:03,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:29:03,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:29:03,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:29:03,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:29:03,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:29:03,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:29:03,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:29:03,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:29:03,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:29:03,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:29:03,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:29:03,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:29:03,498 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:29:03,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:29:03,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:29:03,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:29:03,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:29:03,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:29:03,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:29:03,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:29:03,501 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:29:03,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:29:03,501 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:29:03,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:29:03,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:29:03,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:29:03,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:29:03,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:29:03,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:29:03,502 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:29:03,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:29:03,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:29:03,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:29:03,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:29:03,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:29:03,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:29:03,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:29:03,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:29:03,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:29:03,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:29:03,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:29:03,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:29:03,505 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:29:03,505 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:29:03,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:29:03,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:29:03,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab4ce27c037a23a1acb050e4e5e47861985f2a45717e88488eff45dc32b3cf64 [2021-12-21 13:29:03,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:29:03,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:29:03,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:29:03,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:29:03,709 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:29:03,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2021-12-21 13:29:03,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a75024689/ae40903b24b0428b80bde1e7a00796f9/FLAGed4715118 [2021-12-21 13:29:04,112 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:29:04,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2021-12-21 13:29:04,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a75024689/ae40903b24b0428b80bde1e7a00796f9/FLAGed4715118 [2021-12-21 13:29:04,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a75024689/ae40903b24b0428b80bde1e7a00796f9 [2021-12-21 13:29:04,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:29:04,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:29:04,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:29:04,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:29:04,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:29:04,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@274b7179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04, skipping insertion in model container [2021-12-21 13:29:04,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:29:04,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:29:04,334 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_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c[12667,12680] [2021-12-21 13:29:04,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:29:04,347 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:29:04,393 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_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c[12667,12680] [2021-12-21 13:29:04,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:29:04,404 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:29:04,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04 WrapperNode [2021-12-21 13:29:04,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:29:04,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:29:04,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:29:04,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:29:04,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,454 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 382 [2021-12-21 13:29:04,457 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:29:04,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:29:04,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:29:04,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:29:04,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:29:04,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:29:04,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:29:04,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:29:04,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04" (1/1) ... [2021-12-21 13:29:04,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:29:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:29:04,533 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 13:29:04,539 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 13:29:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:29:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:29:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:29:04,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:29:04,656 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:29:04,668 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:29:05,045 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:29:05,052 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:29:05,052 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 13:29:05,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:29:05 BoogieIcfgContainer [2021-12-21 13:29:05,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:29:05,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:29:05,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:29:05,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:29:05,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:29:04" (1/3) ... [2021-12-21 13:29:05,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6884200c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:29:05, skipping insertion in model container [2021-12-21 13:29:05,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:04" (2/3) ... [2021-12-21 13:29:05,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6884200c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:29:05, skipping insertion in model container [2021-12-21 13:29:05,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:29:05" (3/3) ... [2021-12-21 13:29:05,061 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2021-12-21 13:29:05,066 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:29:05,066 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:29:05,110 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:29:05,116 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 13:29:05,117 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:29:05,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 119 states have (on average 1.7058823529411764) internal successors, (203), 120 states have internal predecessors, (203), 0 states have call successors, (0), 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 13:29:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 13:29:05,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:05,144 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] [2021-12-21 13:29:05,144 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1732857806, now seen corresponding path program 1 times [2021-12-21 13:29:05,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:05,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792943700] [2021-12-21 13:29:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:05,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:05,318 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 13:29:05,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:05,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792943700] [2021-12-21 13:29:05,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792943700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:05,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:05,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 13:29:05,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355993940] [2021-12-21 13:29:05,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:05,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 13:29:05,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:05,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 13:29:05,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:29:05,349 INFO L87 Difference]: Start difference. First operand has 121 states, 119 states have (on average 1.7058823529411764) internal successors, (203), 120 states have internal predecessors, (203), 0 states have call successors, (0), 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 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 13:29:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:05,379 INFO L93 Difference]: Finished difference Result 201 states and 333 transitions. [2021-12-21 13:29:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 13:29:05,381 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-12-21 13:29:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:05,388 INFO L225 Difference]: With dead ends: 201 [2021-12-21 13:29:05,389 INFO L226 Difference]: Without dead ends: 117 [2021-12-21 13:29:05,391 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 13:29:05,395 INFO L933 BasicCegarLoop]: 196 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, 196 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 13:29:05,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-21 13:29:05,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-12-21 13:29:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 116 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 13:29:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 196 transitions. [2021-12-21 13:29:05,434 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 196 transitions. Word has length 33 [2021-12-21 13:29:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:05,434 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 196 transitions. [2021-12-21 13:29:05,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 13:29:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 196 transitions. [2021-12-21 13:29:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 13:29:05,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:05,437 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] [2021-12-21 13:29:05,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:29:05,438 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:05,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2052636400, now seen corresponding path program 1 times [2021-12-21 13:29:05,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:05,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726513398] [2021-12-21 13:29:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:05,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:05,546 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 13:29:05,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:05,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726513398] [2021-12-21 13:29:05,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726513398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:05,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:05,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:29:05,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612957043] [2021-12-21 13:29:05,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:05,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:29:05,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:29:05,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:29:05,551 INFO L87 Difference]: Start difference. First operand 117 states and 196 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 13:29:05,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:05,651 INFO L93 Difference]: Finished difference Result 200 states and 326 transitions. [2021-12-21 13:29:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:29:05,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-12-21 13:29:05,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:05,655 INFO L225 Difference]: With dead ends: 200 [2021-12-21 13:29:05,655 INFO L226 Difference]: Without dead ends: 117 [2021-12-21 13:29:05,655 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 13:29:05,657 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 3 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:05,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 741 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:29:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-21 13:29:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-12-21 13:29:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4137931034482758) internal successors, (164), 116 states have internal predecessors, (164), 0 states have call successors, (0), 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 13:29:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2021-12-21 13:29:05,664 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 33 [2021-12-21 13:29:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:05,664 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2021-12-21 13:29:05,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 13:29:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2021-12-21 13:29:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 13:29:05,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:05,670 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 13:29:05,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:29:05,671 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:05,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:05,672 INFO L85 PathProgramCache]: Analyzing trace with hash 148306117, now seen corresponding path program 1 times [2021-12-21 13:29:05,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:05,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331182454] [2021-12-21 13:29:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:05,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:05,769 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 13:29:05,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:05,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331182454] [2021-12-21 13:29:05,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331182454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:05,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:05,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:05,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010704821] [2021-12-21 13:29:05,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:05,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:05,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:05,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:05,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:05,771 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 13:29:05,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:05,785 INFO L93 Difference]: Finished difference Result 263 states and 396 transitions. [2021-12-21 13:29:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:05,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 13:29:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:05,789 INFO L225 Difference]: With dead ends: 263 [2021-12-21 13:29:05,790 INFO L226 Difference]: Without dead ends: 184 [2021-12-21 13:29:05,790 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 13:29:05,791 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 110 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 366 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 13:29:05,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 366 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-21 13:29:05,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2021-12-21 13:29:05,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.4806629834254144) internal successors, (268), 181 states have internal predecessors, (268), 0 states have call successors, (0), 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 13:29:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 268 transitions. [2021-12-21 13:29:05,804 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 268 transitions. Word has length 64 [2021-12-21 13:29:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:05,805 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 268 transitions. [2021-12-21 13:29:05,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 13:29:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 268 transitions. [2021-12-21 13:29:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 13:29:05,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:05,806 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 13:29:05,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:29:05,807 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:05,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:05,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1747202786, now seen corresponding path program 1 times [2021-12-21 13:29:05,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:05,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520507300] [2021-12-21 13:29:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:05,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:05,860 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 13:29:05,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:05,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520507300] [2021-12-21 13:29:05,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520507300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:05,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:05,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:05,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611857832] [2021-12-21 13:29:05,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:05,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:05,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:05,864 INFO L87 Difference]: Start difference. First operand 182 states and 268 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 13:29:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:05,881 INFO L93 Difference]: Finished difference Result 446 states and 688 transitions. [2021-12-21 13:29:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:05,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 13:29:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:05,883 INFO L225 Difference]: With dead ends: 446 [2021-12-21 13:29:05,883 INFO L226 Difference]: Without dead ends: 302 [2021-12-21 13:29:05,884 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 13:29:05,885 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 105 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 357 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 13:29:05,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 357 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-21 13:29:05,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 300. [2021-12-21 13:29:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.5217391304347827) internal successors, (455), 299 states have internal predecessors, (455), 0 states have call successors, (0), 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 13:29:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 455 transitions. [2021-12-21 13:29:05,909 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 455 transitions. Word has length 65 [2021-12-21 13:29:05,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:05,910 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 455 transitions. [2021-12-21 13:29:05,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 13:29:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 455 transitions. [2021-12-21 13:29:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 13:29:05,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:05,911 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 13:29:05,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:29:05,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash 378408053, now seen corresponding path program 1 times [2021-12-21 13:29:05,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042946087] [2021-12-21 13:29:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:05,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:05,959 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 13:29:05,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042946087] [2021-12-21 13:29:05,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042946087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:05,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:05,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:05,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290224014] [2021-12-21 13:29:05,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:05,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:05,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:05,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:05,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:05,963 INFO L87 Difference]: Start difference. First operand 300 states and 455 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 13:29:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:05,987 INFO L93 Difference]: Finished difference Result 776 states and 1209 transitions. [2021-12-21 13:29:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:05,988 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 13:29:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:05,990 INFO L225 Difference]: With dead ends: 776 [2021-12-21 13:29:05,990 INFO L226 Difference]: Without dead ends: 514 [2021-12-21 13:29:05,992 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 13:29:05,993 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 100 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 348 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 13:29:05,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 348 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:05,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-21 13:29:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2021-12-21 13:29:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.5401174168297456) internal successors, (787), 511 states have internal predecessors, (787), 0 states have call successors, (0), 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 13:29:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 787 transitions. [2021-12-21 13:29:06,014 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 787 transitions. Word has length 66 [2021-12-21 13:29:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:06,014 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 787 transitions. [2021-12-21 13:29:06,014 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 13:29:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 787 transitions. [2021-12-21 13:29:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 13:29:06,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:06,015 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] [2021-12-21 13:29:06,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:29:06,016 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:06,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1350891378, now seen corresponding path program 1 times [2021-12-21 13:29:06,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:06,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800741351] [2021-12-21 13:29:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:06,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:06,065 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 13:29:06,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:06,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800741351] [2021-12-21 13:29:06,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800741351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:06,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:06,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:06,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426662282] [2021-12-21 13:29:06,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:06,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:06,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:06,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:06,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:06,068 INFO L87 Difference]: Start difference. First operand 512 states and 787 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 13:29:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:06,108 INFO L93 Difference]: Finished difference Result 1364 states and 2125 transitions. [2021-12-21 13:29:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:06,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-21 13:29:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:06,114 INFO L225 Difference]: With dead ends: 1364 [2021-12-21 13:29:06,114 INFO L226 Difference]: Without dead ends: 890 [2021-12-21 13:29:06,115 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 13:29:06,116 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 95 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 339 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 13:29:06,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 339 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-12-21 13:29:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2021-12-21 13:29:06,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 1.5411499436302143) internal successors, (1367), 887 states have internal predecessors, (1367), 0 states have call successors, (0), 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 13:29:06,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1367 transitions. [2021-12-21 13:29:06,144 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1367 transitions. Word has length 67 [2021-12-21 13:29:06,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:06,144 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1367 transitions. [2021-12-21 13:29:06,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 13:29:06,144 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1367 transitions. [2021-12-21 13:29:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 13:29:06,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:06,146 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 13:29:06,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:29:06,146 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:06,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:06,147 INFO L85 PathProgramCache]: Analyzing trace with hash 644065317, now seen corresponding path program 1 times [2021-12-21 13:29:06,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:06,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115133786] [2021-12-21 13:29:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:06,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:06,234 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 13:29:06,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:06,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115133786] [2021-12-21 13:29:06,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115133786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:06,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:06,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:29:06,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144500052] [2021-12-21 13:29:06,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:06,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:29:06,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:06,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:29:06,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:29:06,237 INFO L87 Difference]: Start difference. First operand 888 states and 1367 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 13:29:06,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:06,546 INFO L93 Difference]: Finished difference Result 5988 states and 9341 transitions. [2021-12-21 13:29:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:29:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 13:29:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:06,566 INFO L225 Difference]: With dead ends: 5988 [2021-12-21 13:29:06,567 INFO L226 Difference]: Without dead ends: 5138 [2021-12-21 13:29:06,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:29:06,570 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1193 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:06,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 1816 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:29:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5138 states. [2021-12-21 13:29:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5138 to 1736. [2021-12-21 13:29:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 1.534870317002882) internal successors, (2663), 1735 states have internal predecessors, (2663), 0 states have call successors, (0), 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 13:29:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2663 transitions. [2021-12-21 13:29:06,696 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2663 transitions. Word has length 68 [2021-12-21 13:29:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:06,696 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 2663 transitions. [2021-12-21 13:29:06,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 13:29:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2663 transitions. [2021-12-21 13:29:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 13:29:06,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:06,698 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] [2021-12-21 13:29:06,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:29:06,698 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:06,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1892134872, now seen corresponding path program 1 times [2021-12-21 13:29:06,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:06,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449669554] [2021-12-21 13:29:06,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:06,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:06,810 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 13:29:06,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:06,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449669554] [2021-12-21 13:29:06,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449669554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:06,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:06,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:29:06,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767245380] [2021-12-21 13:29:06,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:06,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:29:06,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:06,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:29:06,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:29:06,812 INFO L87 Difference]: Start difference. First operand 1736 states and 2663 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 13:29:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:07,294 INFO L93 Difference]: Finished difference Result 9394 states and 14348 transitions. [2021-12-21 13:29:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:29:07,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-21 13:29:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:07,315 INFO L225 Difference]: With dead ends: 9394 [2021-12-21 13:29:07,316 INFO L226 Difference]: Without dead ends: 7696 [2021-12-21 13:29:07,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:29:07,321 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 670 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:07,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 775 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:29:07,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7696 states. [2021-12-21 13:29:07,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7696 to 7688. [2021-12-21 13:29:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 1.5203590477429427) internal successors, (11687), 7687 states have internal predecessors, (11687), 0 states have call successors, (0), 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 13:29:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 11687 transitions. [2021-12-21 13:29:07,752 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 11687 transitions. Word has length 69 [2021-12-21 13:29:07,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:07,753 INFO L470 AbstractCegarLoop]: Abstraction has 7688 states and 11687 transitions. [2021-12-21 13:29:07,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 13:29:07,753 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 11687 transitions. [2021-12-21 13:29:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-21 13:29:07,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:07,757 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] [2021-12-21 13:29:07,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:29:07,761 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:07,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1491011308, now seen corresponding path program 1 times [2021-12-21 13:29:07,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:07,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795375075] [2021-12-21 13:29:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:07,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:07,835 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 13:29:07,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:07,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795375075] [2021-12-21 13:29:07,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795375075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:07,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:07,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:29:07,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938880227] [2021-12-21 13:29:07,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:07,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:29:07,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:07,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:29:07,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:29:07,837 INFO L87 Difference]: Start difference. First operand 7688 states and 11687 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 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 13:29:08,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:08,489 INFO L93 Difference]: Finished difference Result 15978 states and 23976 transitions. [2021-12-21 13:29:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:29:08,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-12-21 13:29:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:08,526 INFO L225 Difference]: With dead ends: 15978 [2021-12-21 13:29:08,526 INFO L226 Difference]: Without dead ends: 15976 [2021-12-21 13:29:08,529 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 13:29:08,529 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 357 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:08,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 729 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15976 states. [2021-12-21 13:29:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15976 to 8168. [2021-12-21 13:29:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8168 states, 8167 states have (on average 1.4897759275131628) internal successors, (12167), 8167 states have internal predecessors, (12167), 0 states have call successors, (0), 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 13:29:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8168 states to 8168 states and 12167 transitions. [2021-12-21 13:29:08,971 INFO L78 Accepts]: Start accepts. Automaton has 8168 states and 12167 transitions. Word has length 70 [2021-12-21 13:29:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:08,971 INFO L470 AbstractCegarLoop]: Abstraction has 8168 states and 12167 transitions. [2021-12-21 13:29:08,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 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 13:29:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 8168 states and 12167 transitions. [2021-12-21 13:29:08,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 13:29:08,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:08,973 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 13:29:08,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:29:08,973 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:08,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1075868401, now seen corresponding path program 1 times [2021-12-21 13:29:08,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:08,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562532200] [2021-12-21 13:29:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:08,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:09,013 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 13:29:09,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:09,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562532200] [2021-12-21 13:29:09,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562532200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:09,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:09,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:09,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864495590] [2021-12-21 13:29:09,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:09,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:09,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:09,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:09,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:09,016 INFO L87 Difference]: Start difference. First operand 8168 states and 12167 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 13:29:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:09,682 INFO L93 Difference]: Finished difference Result 22556 states and 33449 transitions. [2021-12-21 13:29:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:09,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 13:29:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:09,704 INFO L225 Difference]: With dead ends: 22556 [2021-12-21 13:29:09,704 INFO L226 Difference]: Without dead ends: 14426 [2021-12-21 13:29:09,712 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 13:29:09,713 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 85 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:09,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 285 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14426 states. [2021-12-21 13:29:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14426 to 14280. [2021-12-21 13:29:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14280 states, 14279 states have (on average 1.462777505427551) internal successors, (20887), 14279 states have internal predecessors, (20887), 0 states have call successors, (0), 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 13:29:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14280 states to 14280 states and 20887 transitions. [2021-12-21 13:29:10,431 INFO L78 Accepts]: Start accepts. Automaton has 14280 states and 20887 transitions. Word has length 71 [2021-12-21 13:29:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:10,432 INFO L470 AbstractCegarLoop]: Abstraction has 14280 states and 20887 transitions. [2021-12-21 13:29:10,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 13:29:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 14280 states and 20887 transitions. [2021-12-21 13:29:10,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 13:29:10,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:10,433 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 13:29:10,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:29:10,434 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:10,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1119250846, now seen corresponding path program 1 times [2021-12-21 13:29:10,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:10,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536300650] [2021-12-21 13:29:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:10,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:10,459 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 13:29:10,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536300650] [2021-12-21 13:29:10,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536300650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:10,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:10,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:10,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629250981] [2021-12-21 13:29:10,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:10,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:10,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:10,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:10,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:10,462 INFO L87 Difference]: Start difference. First operand 14280 states and 20887 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 13:29:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:11,392 INFO L93 Difference]: Finished difference Result 28783 states and 42269 transitions. [2021-12-21 13:29:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 13:29:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:11,427 INFO L225 Difference]: With dead ends: 28783 [2021-12-21 13:29:11,427 INFO L226 Difference]: Without dead ends: 20652 [2021-12-21 13:29:11,440 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 13:29:11,441 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 111 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 387 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 13:29:11,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 387 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20652 states. [2021-12-21 13:29:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20652 to 20650. [2021-12-21 13:29:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20650 states, 20649 states have (on average 1.4517410044069932) internal successors, (29977), 20649 states have internal predecessors, (29977), 0 states have call successors, (0), 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 13:29:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 29977 transitions. [2021-12-21 13:29:12,447 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 29977 transitions. Word has length 72 [2021-12-21 13:29:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:12,447 INFO L470 AbstractCegarLoop]: Abstraction has 20650 states and 29977 transitions. [2021-12-21 13:29:12,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 13:29:12,449 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 29977 transitions. [2021-12-21 13:29:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 13:29:12,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:12,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:29:12,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:29:12,457 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1256319803, now seen corresponding path program 1 times [2021-12-21 13:29:12,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:12,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672893274] [2021-12-21 13:29:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:12,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:12,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:12,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672893274] [2021-12-21 13:29:12,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672893274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:12,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:12,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:12,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651775171] [2021-12-21 13:29:12,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:12,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:12,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:12,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:12,508 INFO L87 Difference]: Start difference. First operand 20650 states and 29977 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 13:29:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:13,914 INFO L93 Difference]: Finished difference Result 51965 states and 75309 transitions. [2021-12-21 13:29:13,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:13,915 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 99 [2021-12-21 13:29:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:13,962 INFO L225 Difference]: With dead ends: 51965 [2021-12-21 13:29:13,962 INFO L226 Difference]: Without dead ends: 34683 [2021-12-21 13:29:13,983 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 13:29:13,984 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 84 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:13,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 325 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34683 states. [2021-12-21 13:29:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34683 to 33297. [2021-12-21 13:29:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33297 states, 33296 states have (on average 1.4366590581451226) internal successors, (47835), 33296 states have internal predecessors, (47835), 0 states have call successors, (0), 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 13:29:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33297 states to 33297 states and 47835 transitions. [2021-12-21 13:29:15,867 INFO L78 Accepts]: Start accepts. Automaton has 33297 states and 47835 transitions. Word has length 99 [2021-12-21 13:29:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:15,867 INFO L470 AbstractCegarLoop]: Abstraction has 33297 states and 47835 transitions. [2021-12-21 13:29:15,867 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 13:29:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 33297 states and 47835 transitions. [2021-12-21 13:29:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 13:29:15,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:15,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:29:15,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:29:15,882 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:15,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1278390955, now seen corresponding path program 1 times [2021-12-21 13:29:15,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:15,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583509737] [2021-12-21 13:29:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:15,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:29:15,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:15,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583509737] [2021-12-21 13:29:15,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583509737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:15,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:15,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:29:15,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271669253] [2021-12-21 13:29:15,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:15,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:29:15,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:15,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:29:15,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:29:15,945 INFO L87 Difference]: Start difference. First operand 33297 states and 47835 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 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 13:29:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:18,771 INFO L93 Difference]: Finished difference Result 82133 states and 119169 transitions. [2021-12-21 13:29:18,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:29:18,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 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 13:29:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:18,872 INFO L225 Difference]: With dead ends: 82133 [2021-12-21 13:29:18,872 INFO L226 Difference]: Without dead ends: 69243 [2021-12-21 13:29:18,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:29:18,898 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 1071 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:18,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 1209 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:29:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69243 states. [2021-12-21 13:29:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69243 to 45897. [2021-12-21 13:29:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45897 states, 45896 states have (on average 1.4365304165940387) internal successors, (65931), 45896 states have internal predecessors, (65931), 0 states have call successors, (0), 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 13:29:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45897 states to 45897 states and 65931 transitions. [2021-12-21 13:29:21,948 INFO L78 Accepts]: Start accepts. Automaton has 45897 states and 65931 transitions. Word has length 99 [2021-12-21 13:29:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:21,949 INFO L470 AbstractCegarLoop]: Abstraction has 45897 states and 65931 transitions. [2021-12-21 13:29:21,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 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 13:29:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 45897 states and 65931 transitions. [2021-12-21 13:29:21,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 13:29:21,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:21,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:29:21,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:29:21,964 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:21,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1536118245, now seen corresponding path program 1 times [2021-12-21 13:29:21,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:21,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107124228] [2021-12-21 13:29:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:21,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:21,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:21,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107124228] [2021-12-21 13:29:21,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107124228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:21,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:21,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:21,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363444131] [2021-12-21 13:29:21,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:21,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:21,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:21,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:21,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:21,996 INFO L87 Difference]: Start difference. First operand 45897 states and 65931 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 13:29:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:25,208 INFO L93 Difference]: Finished difference Result 91107 states and 130738 transitions. [2021-12-21 13:29:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:25,209 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 99 [2021-12-21 13:29:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:25,298 INFO L225 Difference]: With dead ends: 91107 [2021-12-21 13:29:25,298 INFO L226 Difference]: Without dead ends: 65137 [2021-12-21 13:29:25,319 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 13:29:25,321 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 87 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:25,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 351 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:25,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65137 states. [2021-12-21 13:29:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65137 to 59867. [2021-12-21 13:29:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59867 states, 59866 states have (on average 1.4217084822770856) internal successors, (85112), 59866 states have internal predecessors, (85112), 0 states have call successors, (0), 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 13:29:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59867 states to 59867 states and 85112 transitions. [2021-12-21 13:29:28,458 INFO L78 Accepts]: Start accepts. Automaton has 59867 states and 85112 transitions. Word has length 99 [2021-12-21 13:29:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:28,458 INFO L470 AbstractCegarLoop]: Abstraction has 59867 states and 85112 transitions. [2021-12-21 13:29:28,459 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 13:29:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 59867 states and 85112 transitions. [2021-12-21 13:29:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 13:29:28,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:28,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:29:28,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:29:28,478 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:28,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:28,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1963464309, now seen corresponding path program 1 times [2021-12-21 13:29:28,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:28,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498312229] [2021-12-21 13:29:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:28,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:28,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:28,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498312229] [2021-12-21 13:29:28,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498312229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:28,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:28,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:28,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047075973] [2021-12-21 13:29:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:28,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:28,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:28,505 INFO L87 Difference]: Start difference. First operand 59867 states and 85112 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 13:29:32,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:32,258 INFO L93 Difference]: Finished difference Result 95012 states and 134424 transitions. [2021-12-21 13:29:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:32,259 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 99 [2021-12-21 13:29:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:32,349 INFO L225 Difference]: With dead ends: 95012 [2021-12-21 13:29:32,349 INFO L226 Difference]: Without dead ends: 63682 [2021-12-21 13:29:32,379 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 13:29:32,380 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 88 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:32,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 367 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63682 states. [2021-12-21 13:29:36,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63682 to 60732. [2021-12-21 13:29:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60732 states, 60731 states have (on average 1.3985773328283744) internal successors, (84937), 60731 states have internal predecessors, (84937), 0 states have call successors, (0), 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 13:29:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60732 states to 60732 states and 84937 transitions. [2021-12-21 13:29:36,156 INFO L78 Accepts]: Start accepts. Automaton has 60732 states and 84937 transitions. Word has length 99 [2021-12-21 13:29:36,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:36,156 INFO L470 AbstractCegarLoop]: Abstraction has 60732 states and 84937 transitions. [2021-12-21 13:29:36,156 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 13:29:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 60732 states and 84937 transitions. [2021-12-21 13:29:36,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 13:29:36,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:36,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:29:36,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:29:36,172 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:36,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash 429145653, now seen corresponding path program 1 times [2021-12-21 13:29:36,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:36,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451869349] [2021-12-21 13:29:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:36,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:29:36,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:36,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451869349] [2021-12-21 13:29:36,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451869349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:36,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:36,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:29:36,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574876259] [2021-12-21 13:29:36,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:36,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:29:36,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:29:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:29:36,239 INFO L87 Difference]: Start difference. First operand 60732 states and 84937 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 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 13:29:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:41,548 INFO L93 Difference]: Finished difference Result 117878 states and 166778 transitions. [2021-12-21 13:29:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:29:41,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 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 13:29:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:41,703 INFO L225 Difference]: With dead ends: 117878 [2021-12-21 13:29:41,704 INFO L226 Difference]: Without dead ends: 109236 [2021-12-21 13:29:41,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:29:41,728 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 1158 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:41,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1158 Valid, 1153 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:29:41,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109236 states.