./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ed935744e0b15a55a11878fa4d21c1a0b8f1c4098e81aa4afd54cd8910ee834a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:53:35,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:53:35,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:53:35,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:53:35,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:53:35,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:53:35,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:53:35,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:53:35,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:53:35,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:53:35,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:53:35,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:53:35,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:53:35,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:53:35,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:53:35,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:53:35,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:53:35,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:53:35,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:53:35,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:53:35,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:53:35,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:53:35,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:53:35,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:53:35,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:53:35,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:53:35,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:53:35,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:53:35,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:53:35,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:53:35,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:53:35,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:53:35,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:53:35,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:53:35,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:53:35,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:53:35,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:53:35,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:53:35,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:53:35,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:53:35,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:53:35,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:53:35,673 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:53:35,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:53:35,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:53:35,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:53:35,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:53:35,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:53:35,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:53:35,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:53:35,680 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:53:35,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:53:35,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:53:35,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:53:35,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:53:35,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:53:35,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:53:35,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:53:35,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:53:35,682 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:53:35,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:53:35,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:53:35,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:53:35,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:53:35,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:53:35,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:53:35,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:53:35,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:53:35,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:53:35,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:53:35,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:53:35,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:53:35,684 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:53:35,685 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:53:35,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:53:35,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:53:35,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed935744e0b15a55a11878fa4d21c1a0b8f1c4098e81aa4afd54cd8910ee834a [2021-12-22 11:53:35,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:53:35,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:53:35,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:53:35,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:53:35,896 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:53:35,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:53:35,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca0fe897/16e437597207406180b62c66ecfc17f8/FLAG7b08b1e72 [2021-12-22 11:53:36,344 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:53:36,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:53:36,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca0fe897/16e437597207406180b62c66ecfc17f8/FLAG7b08b1e72 [2021-12-22 11:53:36,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca0fe897/16e437597207406180b62c66ecfc17f8 [2021-12-22 11:53:36,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:53:36,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:53:36,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:53:36,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:53:36,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:53:36,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:53:36" (1/1) ... [2021-12-22 11:53:36,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f119b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:36, skipping insertion in model container [2021-12-22 11:53:36,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:53:36" (1/1) ... [2021-12-22 11:53:36,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:53:36,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:53:37,080 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_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c[26792,26805] [2021-12-22 11:53:37,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:53:37,095 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:53:37,178 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_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c[26792,26805] [2021-12-22 11:53:37,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:53:37,198 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:53:37,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37 WrapperNode [2021-12-22 11:53:37,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:53:37,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:53:37,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:53:37,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:53:37,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37" (1/1) ... [2021-12-22 11:53:37,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37" (1/1) ... [2021-12-22 11:53:37,290 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 984 [2021-12-22 11:53:37,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:53:37,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:53:37,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:53:37,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:53:37,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37" (1/1) ... [2021-12-22 11:53:37,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37" (1/1) ... [2021-12-22 11:53:37,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37" (1/1) ... [2021-12-22 11:53:37,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37" (1/1) ... [2021-12-22 11:53:37,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37" (1/1) ... [2021-12-22 11:53:37,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37" (1/1) ... [2021-12-22 11:53:37,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37" (1/1) ... [2021-12-22 11:53:37,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:53:37,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:53:37,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:53:37,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:53:37,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37" (1/1) ... [2021-12-22 11:53:37,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:53:37,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:53:37,377 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 11:53:37,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 11:53:37,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:53:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:53:37,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:53:37,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:53:37,533 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:53:37,535 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:53:38,088 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:53:38,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:53:38,096 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:53:38,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:53:38 BoogieIcfgContainer [2021-12-22 11:53:38,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:53:38,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:53:38,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:53:38,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:53:38,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:53:36" (1/3) ... [2021-12-22 11:53:38,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759333c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:53:38, skipping insertion in model container [2021-12-22 11:53:38,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:37" (2/3) ... [2021-12-22 11:53:38,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759333c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:53:38, skipping insertion in model container [2021-12-22 11:53:38,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:53:38" (3/3) ... [2021-12-22 11:53:38,104 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:53:38,107 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:53:38,107 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:53:38,142 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:53:38,147 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 11:53:38,147 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:53:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 320 states, 318 states have (on average 1.7924528301886793) internal successors, (570), 319 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:38,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 11:53:38,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:38,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:38,172 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:38,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1302956056, now seen corresponding path program 1 times [2021-12-22 11:53:38,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:38,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388613497] [2021-12-22 11:53:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:38,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:38,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388613497] [2021-12-22 11:53:38,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388613497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:38,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:38,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:53:38,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666984069] [2021-12-22 11:53:38,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:38,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:53:38,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:38,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:53:38,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:53:38,512 INFO L87 Difference]: Start difference. First operand has 320 states, 318 states have (on average 1.7924528301886793) internal successors, (570), 319 states have internal predecessors, (570), 0 states have call successors, (0), 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 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:38,568 INFO L93 Difference]: Finished difference Result 453 states and 799 transitions. [2021-12-22 11:53:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:53:38,570 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-22 11:53:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:38,585 INFO L225 Difference]: With dead ends: 453 [2021-12-22 11:53:38,586 INFO L226 Difference]: Without dead ends: 316 [2021-12-22 11:53:38,590 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 [2021-12-22 11:53:38,597 INFO L933 BasicCegarLoop]: 563 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, 563 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 [2021-12-22 11:53:38,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-22 11:53:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-12-22 11:53:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.7873015873015874) internal successors, (563), 315 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 563 transitions. [2021-12-22 11:53:38,665 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 563 transitions. Word has length 77 [2021-12-22 11:53:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:38,666 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 563 transitions. [2021-12-22 11:53:38,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 563 transitions. [2021-12-22 11:53:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 11:53:38,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:38,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:38,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:53:38,669 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:38,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1436969562, now seen corresponding path program 1 times [2021-12-22 11:53:38,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:38,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289502091] [2021-12-22 11:53:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:38,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:38,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289502091] [2021-12-22 11:53:38,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289502091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:38,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:38,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:53:38,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144913612] [2021-12-22 11:53:38,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:38,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:53:38,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:53:38,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:38,806 INFO L87 Difference]: Start difference. First operand 316 states and 563 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:38,888 INFO L93 Difference]: Finished difference Result 452 states and 792 transitions. [2021-12-22 11:53:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:53:38,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-22 11:53:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:38,891 INFO L225 Difference]: With dead ends: 452 [2021-12-22 11:53:38,891 INFO L226 Difference]: Without dead ends: 316 [2021-12-22 11:53:38,892 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 [2021-12-22 11:53:38,894 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 3 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2207 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:38,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2207 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-22 11:53:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-12-22 11:53:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.6793650793650794) internal successors, (529), 315 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 529 transitions. [2021-12-22 11:53:38,902 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 529 transitions. Word has length 77 [2021-12-22 11:53:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:38,902 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 529 transitions. [2021-12-22 11:53:38,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 529 transitions. [2021-12-22 11:53:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-22 11:53:38,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:38,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:38,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:53:38,906 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1445636690, now seen corresponding path program 1 times [2021-12-22 11:53:38,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:38,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229434651] [2021-12-22 11:53:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:38,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:39,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229434651] [2021-12-22 11:53:39,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229434651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:39,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:39,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:39,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104119379] [2021-12-22 11:53:39,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:39,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:39,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:39,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:39,024 INFO L87 Difference]: Start difference. First operand 316 states and 529 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:39,058 INFO L93 Difference]: Finished difference Result 568 states and 957 transitions. [2021-12-22 11:53:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:39,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-22 11:53:39,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:39,060 INFO L225 Difference]: With dead ends: 568 [2021-12-22 11:53:39,060 INFO L226 Difference]: Without dead ends: 436 [2021-12-22 11:53:39,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:39,062 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 194 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:39,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1006 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:39,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-12-22 11:53:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 433. [2021-12-22 11:53:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.6759259259259258) internal successors, (724), 432 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 724 transitions. [2021-12-22 11:53:39,072 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 724 transitions. Word has length 110 [2021-12-22 11:53:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:39,072 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 724 transitions. [2021-12-22 11:53:39,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 724 transitions. [2021-12-22 11:53:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 11:53:39,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:39,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:39,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:53:39,075 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -880032262, now seen corresponding path program 1 times [2021-12-22 11:53:39,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:39,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071056287] [2021-12-22 11:53:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:39,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:39,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:39,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071056287] [2021-12-22 11:53:39,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071056287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:39,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:39,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:39,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39606474] [2021-12-22 11:53:39,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:39,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:39,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:39,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:39,155 INFO L87 Difference]: Start difference. First operand 433 states and 724 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:39,180 INFO L93 Difference]: Finished difference Result 911 states and 1528 transitions. [2021-12-22 11:53:39,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:39,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-22 11:53:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:39,183 INFO L225 Difference]: With dead ends: 911 [2021-12-22 11:53:39,183 INFO L226 Difference]: Without dead ends: 662 [2021-12-22 11:53:39,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:39,185 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 195 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:39,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 1019 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:39,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-22 11:53:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 658. [2021-12-22 11:53:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.6757990867579908) internal successors, (1101), 657 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1101 transitions. [2021-12-22 11:53:39,206 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1101 transitions. Word has length 113 [2021-12-22 11:53:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:39,207 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1101 transitions. [2021-12-22 11:53:39,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1101 transitions. [2021-12-22 11:53:39,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 11:53:39,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:39,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:39,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:53:39,210 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:39,212 INFO L85 PathProgramCache]: Analyzing trace with hash 164082803, now seen corresponding path program 1 times [2021-12-22 11:53:39,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:39,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037334068] [2021-12-22 11:53:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:39,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:39,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:39,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037334068] [2021-12-22 11:53:39,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037334068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:39,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:39,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:39,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980051511] [2021-12-22 11:53:39,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:39,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:39,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:39,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:39,321 INFO L87 Difference]: Start difference. First operand 658 states and 1101 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:39,368 INFO L93 Difference]: Finished difference Result 1566 states and 2623 transitions. [2021-12-22 11:53:39,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:39,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-12-22 11:53:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:39,372 INFO L225 Difference]: With dead ends: 1566 [2021-12-22 11:53:39,372 INFO L226 Difference]: Without dead ends: 1092 [2021-12-22 11:53:39,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:39,374 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 188 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:39,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1020 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-12-22 11:53:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1086. [2021-12-22 11:53:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 1.6709677419354838) internal successors, (1813), 1085 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1813 transitions. [2021-12-22 11:53:39,393 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1813 transitions. Word has length 116 [2021-12-22 11:53:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:39,394 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1813 transitions. [2021-12-22 11:53:39,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1813 transitions. [2021-12-22 11:53:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-22 11:53:39,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:39,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:39,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:53:39,396 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:39,397 INFO L85 PathProgramCache]: Analyzing trace with hash 725306107, now seen corresponding path program 1 times [2021-12-22 11:53:39,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:39,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831591566] [2021-12-22 11:53:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:39,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:39,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:39,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831591566] [2021-12-22 11:53:39,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831591566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:39,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:39,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:39,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132782110] [2021-12-22 11:53:39,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:39,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:39,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:39,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:39,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:39,444 INFO L87 Difference]: Start difference. First operand 1086 states and 1813 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:39,481 INFO L93 Difference]: Finished difference Result 2810 states and 4687 transitions. [2021-12-22 11:53:39,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:39,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-22 11:53:39,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:39,487 INFO L225 Difference]: With dead ends: 2810 [2021-12-22 11:53:39,487 INFO L226 Difference]: Without dead ends: 1908 [2021-12-22 11:53:39,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:39,489 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 181 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:39,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1021 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:39,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-12-22 11:53:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1898. [2021-12-22 11:53:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 1.6620980495519242) internal successors, (3153), 1897 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 3153 transitions. [2021-12-22 11:53:39,545 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 3153 transitions. Word has length 119 [2021-12-22 11:53:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:39,546 INFO L470 AbstractCegarLoop]: Abstraction has 1898 states and 3153 transitions. [2021-12-22 11:53:39,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 3153 transitions. [2021-12-22 11:53:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-22 11:53:39,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:39,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:39,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:53:39,549 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:39,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1859517548, now seen corresponding path program 1 times [2021-12-22 11:53:39,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:39,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160891837] [2021-12-22 11:53:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:39,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:39,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:39,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160891837] [2021-12-22 11:53:39,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160891837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:39,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:39,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:53:39,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151404255] [2021-12-22 11:53:39,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:39,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:53:39,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:53:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:53:39,623 INFO L87 Difference]: Start difference. First operand 1898 states and 3153 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:39,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:39,900 INFO L93 Difference]: Finished difference Result 9894 states and 16569 transitions. [2021-12-22 11:53:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 11:53:39,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-12-22 11:53:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:39,929 INFO L225 Difference]: With dead ends: 9894 [2021-12-22 11:53:39,929 INFO L226 Difference]: Without dead ends: 8180 [2021-12-22 11:53:39,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 11:53:39,936 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 2244 mSDsluCounter, 3823 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2244 SdHoareTripleChecker+Valid, 4354 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:39,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2244 Valid, 4354 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:53:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8180 states. [2021-12-22 11:53:40,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8180 to 3498. [2021-12-22 11:53:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3497 states have (on average 1.661424077780955) internal successors, (5810), 3497 states have internal predecessors, (5810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 5810 transitions. [2021-12-22 11:53:40,099 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 5810 transitions. Word has length 122 [2021-12-22 11:53:40,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:40,099 INFO L470 AbstractCegarLoop]: Abstraction has 3498 states and 5810 transitions. [2021-12-22 11:53:40,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 5810 transitions. [2021-12-22 11:53:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-22 11:53:40,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:40,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:40,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:53:40,102 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:40,103 INFO L85 PathProgramCache]: Analyzing trace with hash 389891547, now seen corresponding path program 1 times [2021-12-22 11:53:40,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:40,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524041436] [2021-12-22 11:53:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:40,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:40,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:40,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524041436] [2021-12-22 11:53:40,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524041436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:40,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:40,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:53:40,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207678555] [2021-12-22 11:53:40,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:40,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:53:40,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:40,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:53:40,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:53:40,152 INFO L87 Difference]: Start difference. First operand 3498 states and 5810 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:40,348 INFO L93 Difference]: Finished difference Result 10254 states and 17124 transitions. [2021-12-22 11:53:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:53:40,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-12-22 11:53:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:40,369 INFO L225 Difference]: With dead ends: 10254 [2021-12-22 11:53:40,369 INFO L226 Difference]: Without dead ends: 6940 [2021-12-22 11:53:40,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:40,375 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 653 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:40,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 1735 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6940 states. [2021-12-22 11:53:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6940 to 5202. [2021-12-22 11:53:40,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5202 states, 5201 states have (on average 1.6637185156700633) internal successors, (8653), 5201 states have internal predecessors, (8653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5202 states to 5202 states and 8653 transitions. [2021-12-22 11:53:40,542 INFO L78 Accepts]: Start accepts. Automaton has 5202 states and 8653 transitions. Word has length 123 [2021-12-22 11:53:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:40,542 INFO L470 AbstractCegarLoop]: Abstraction has 5202 states and 8653 transitions. [2021-12-22 11:53:40,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 5202 states and 8653 transitions. [2021-12-22 11:53:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-22 11:53:40,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:40,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:40,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:53:40,546 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:40,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1571101099, now seen corresponding path program 1 times [2021-12-22 11:53:40,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:40,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869794333] [2021-12-22 11:53:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:40,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:40,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:40,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869794333] [2021-12-22 11:53:40,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869794333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:40,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:40,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:53:40,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407455534] [2021-12-22 11:53:40,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:40,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:53:40,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:40,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:53:40,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:53:40,592 INFO L87 Difference]: Start difference. First operand 5202 states and 8653 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:40,867 INFO L93 Difference]: Finished difference Result 15284 states and 25488 transitions. [2021-12-22 11:53:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:53:40,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-22 11:53:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:40,893 INFO L225 Difference]: With dead ends: 15284 [2021-12-22 11:53:40,894 INFO L226 Difference]: Without dead ends: 10266 [2021-12-22 11:53:40,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:40,905 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 653 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:40,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 1725 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:40,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10266 states. [2021-12-22 11:53:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10266 to 7710. [2021-12-22 11:53:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7710 states, 7709 states have (on average 1.661304968218965) internal successors, (12807), 7709 states have internal predecessors, (12807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7710 states to 7710 states and 12807 transitions. [2021-12-22 11:53:41,172 INFO L78 Accepts]: Start accepts. Automaton has 7710 states and 12807 transitions. Word has length 124 [2021-12-22 11:53:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:41,172 INFO L470 AbstractCegarLoop]: Abstraction has 7710 states and 12807 transitions. [2021-12-22 11:53:41,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 7710 states and 12807 transitions. [2021-12-22 11:53:41,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-22 11:53:41,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:41,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:41,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:53:41,176 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:41,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:41,177 INFO L85 PathProgramCache]: Analyzing trace with hash -297104110, now seen corresponding path program 1 times [2021-12-22 11:53:41,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:41,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964488683] [2021-12-22 11:53:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:41,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:41,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:41,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964488683] [2021-12-22 11:53:41,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964488683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:41,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:41,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:53:41,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81673268] [2021-12-22 11:53:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:41,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:53:41,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:41,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:53:41,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:53:41,219 INFO L87 Difference]: Start difference. First operand 7710 states and 12807 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:41,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:41,559 INFO L93 Difference]: Finished difference Result 22700 states and 37800 transitions. [2021-12-22 11:53:41,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:53:41,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-12-22 11:53:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:41,586 INFO L225 Difference]: With dead ends: 22700 [2021-12-22 11:53:41,587 INFO L226 Difference]: Without dead ends: 15174 [2021-12-22 11:53:41,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:41,597 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 651 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:41,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 1727 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15174 states. [2021-12-22 11:53:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15174 to 11408. [2021-12-22 11:53:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11408 states, 11407 states have (on average 1.6588936617866223) internal successors, (18923), 11407 states have internal predecessors, (18923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11408 states to 11408 states and 18923 transitions. [2021-12-22 11:53:42,009 INFO L78 Accepts]: Start accepts. Automaton has 11408 states and 18923 transitions. Word has length 125 [2021-12-22 11:53:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:42,010 INFO L470 AbstractCegarLoop]: Abstraction has 11408 states and 18923 transitions. [2021-12-22 11:53:42,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11408 states and 18923 transitions. [2021-12-22 11:53:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-22 11:53:42,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:42,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:42,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:53:42,016 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash 353038505, now seen corresponding path program 1 times [2021-12-22 11:53:42,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:42,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958539994] [2021-12-22 11:53:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:42,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:42,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958539994] [2021-12-22 11:53:42,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958539994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:42,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:42,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:42,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359438945] [2021-12-22 11:53:42,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:42,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:42,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:42,062 INFO L87 Difference]: Start difference. First operand 11408 states and 18923 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:42,457 INFO L93 Difference]: Finished difference Result 25535 states and 42517 transitions. [2021-12-22 11:53:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:42,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-12-22 11:53:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:42,496 INFO L225 Difference]: With dead ends: 25535 [2021-12-22 11:53:42,497 INFO L226 Difference]: Without dead ends: 17604 [2021-12-22 11:53:42,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:42,507 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 201 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1184 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 [2021-12-22 11:53:42,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 1184 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:42,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17604 states. [2021-12-22 11:53:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17604 to 17602. [2021-12-22 11:53:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17602 states, 17601 states have (on average 1.6563263450940287) internal successors, (29153), 17601 states have internal predecessors, (29153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17602 states to 17602 states and 29153 transitions. [2021-12-22 11:53:43,017 INFO L78 Accepts]: Start accepts. Automaton has 17602 states and 29153 transitions. Word has length 126 [2021-12-22 11:53:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:43,017 INFO L470 AbstractCegarLoop]: Abstraction has 17602 states and 29153 transitions. [2021-12-22 11:53:43,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17602 states and 29153 transitions. [2021-12-22 11:53:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-22 11:53:43,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:43,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:43,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:53:43,020 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:43,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:43,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2087080898, now seen corresponding path program 1 times [2021-12-22 11:53:43,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:43,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662928793] [2021-12-22 11:53:43,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:43,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:43,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:43,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662928793] [2021-12-22 11:53:43,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662928793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:43,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:43,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:53:43,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154964961] [2021-12-22 11:53:43,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:43,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:53:43,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:43,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:53:43,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:53:43,064 INFO L87 Difference]: Start difference. First operand 17602 states and 29153 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:43,960 INFO L93 Difference]: Finished difference Result 52054 states and 86438 transitions. [2021-12-22 11:53:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:53:43,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-12-22 11:53:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:44,034 INFO L225 Difference]: With dead ends: 52054 [2021-12-22 11:53:44,034 INFO L226 Difference]: Without dead ends: 34638 [2021-12-22 11:53:44,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:53:44,054 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 649 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:44,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 1769 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:53:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34638 states. [2021-12-22 11:53:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34638 to 26040. [2021-12-22 11:53:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26040 states, 26039 states have (on average 1.653634932217059) internal successors, (43059), 26039 states have internal predecessors, (43059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26040 states to 26040 states and 43059 transitions. [2021-12-22 11:53:44,838 INFO L78 Accepts]: Start accepts. Automaton has 26040 states and 43059 transitions. Word has length 126 [2021-12-22 11:53:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:44,840 INFO L470 AbstractCegarLoop]: Abstraction has 26040 states and 43059 transitions. [2021-12-22 11:53:44,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:44,841 INFO L276 IsEmpty]: Start isEmpty. Operand 26040 states and 43059 transitions. [2021-12-22 11:53:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-22 11:53:44,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:44,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:44,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:53:44,845 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1488761057, now seen corresponding path program 1 times [2021-12-22 11:53:44,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:44,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306409695] [2021-12-22 11:53:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:44,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:44,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:44,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306409695] [2021-12-22 11:53:44,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306409695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:44,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:44,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:44,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283982222] [2021-12-22 11:53:44,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:44,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:44,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:44,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:44,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:44,916 INFO L87 Difference]: Start difference. First operand 26040 states and 43059 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:45,704 INFO L93 Difference]: Finished difference Result 58346 states and 96474 transitions. [2021-12-22 11:53:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:45,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-12-22 11:53:45,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:45,792 INFO L225 Difference]: With dead ends: 58346 [2021-12-22 11:53:45,793 INFO L226 Difference]: Without dead ends: 40136 [2021-12-22 11:53:45,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:45,823 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 180 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1078 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 [2021-12-22 11:53:45,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1078 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40136 states. [2021-12-22 11:53:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40136 to 40134. [2021-12-22 11:53:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40134 states, 40133 states have (on average 1.6451797772406747) internal successors, (66026), 40133 states have internal predecessors, (66026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40134 states to 40134 states and 66026 transitions. [2021-12-22 11:53:47,043 INFO L78 Accepts]: Start accepts. Automaton has 40134 states and 66026 transitions. Word has length 126 [2021-12-22 11:53:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:47,043 INFO L470 AbstractCegarLoop]: Abstraction has 40134 states and 66026 transitions. [2021-12-22 11:53:47,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 40134 states and 66026 transitions. [2021-12-22 11:53:47,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-22 11:53:47,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:47,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:47,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:53:47,046 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:47,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:47,046 INFO L85 PathProgramCache]: Analyzing trace with hash 814940521, now seen corresponding path program 1 times [2021-12-22 11:53:47,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:47,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298441555] [2021-12-22 11:53:47,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:47,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:47,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:47,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298441555] [2021-12-22 11:53:47,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298441555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:47,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:47,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:47,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577738868] [2021-12-22 11:53:47,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:47,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:47,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:47,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:47,092 INFO L87 Difference]: Start difference. First operand 40134 states and 66026 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:48,330 INFO L93 Difference]: Finished difference Result 88954 states and 146360 transitions. [2021-12-22 11:53:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:48,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-12-22 11:53:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:48,434 INFO L225 Difference]: With dead ends: 88954 [2021-12-22 11:53:48,435 INFO L226 Difference]: Without dead ends: 60870 [2021-12-22 11:53:48,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:48,461 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 187 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1123 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 [2021-12-22 11:53:48,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1123 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60870 states. [2021-12-22 11:53:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60870 to 60868. [2021-12-22 11:53:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60868 states, 60867 states have (on average 1.6361410945175547) internal successors, (99587), 60867 states have internal predecessors, (99587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60868 states to 60868 states and 99587 transitions. [2021-12-22 11:53:50,230 INFO L78 Accepts]: Start accepts. Automaton has 60868 states and 99587 transitions. Word has length 126 [2021-12-22 11:53:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:50,230 INFO L470 AbstractCegarLoop]: Abstraction has 60868 states and 99587 transitions. [2021-12-22 11:53:50,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 60868 states and 99587 transitions. [2021-12-22 11:53:50,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-22 11:53:50,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:50,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:50,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:53:50,232 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:50,233 INFO L85 PathProgramCache]: Analyzing trace with hash -122812449, now seen corresponding path program 1 times [2021-12-22 11:53:50,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:50,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258546592] [2021-12-22 11:53:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:50,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:50,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:50,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258546592] [2021-12-22 11:53:50,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258546592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:50,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:50,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:53:50,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660330144] [2021-12-22 11:53:50,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:50,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:53:50,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:50,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:53:50,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:50,274 INFO L87 Difference]: Start difference. First operand 60868 states and 99587 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:52,483 INFO L93 Difference]: Finished difference Result 134291 states and 219638 transitions. [2021-12-22 11:53:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:53:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-12-22 11:53:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:52,619 INFO L225 Difference]: With dead ends: 134291 [2021-12-22 11:53:52,619 INFO L226 Difference]: Without dead ends: 91474 [2021-12-22 11:53:52,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:53:52,653 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 194 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1168 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 [2021-12-22 11:53:52,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1168 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91474 states. [2021-12-22 11:53:55,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91474 to 91472. [2021-12-22 11:53:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91472 states, 91471 states have (on average 1.6247225896732298) internal successors, (148615), 91471 states have internal predecessors, (148615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:55,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91472 states to 91472 states and 148615 transitions. [2021-12-22 11:53:55,575 INFO L78 Accepts]: Start accepts. Automaton has 91472 states and 148615 transitions. Word has length 126 [2021-12-22 11:53:55,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:55,576 INFO L470 AbstractCegarLoop]: Abstraction has 91472 states and 148615 transitions. [2021-12-22 11:53:55,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:55,576 INFO L276 IsEmpty]: Start isEmpty. Operand 91472 states and 148615 transitions. [2021-12-22 11:53:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-22 11:53:55,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:55,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:55,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:53:55,578 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:55,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:55,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2013833626, now seen corresponding path program 1 times [2021-12-22 11:53:55,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:55,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618190209] [2021-12-22 11:53:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:55,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:53:55,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:55,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618190209] [2021-12-22 11:53:55,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618190209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:55,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:55,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:53:55,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273472920] [2021-12-22 11:53:55,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:55,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:53:55,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:55,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:53:55,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:53:55,692 INFO L87 Difference]: Start difference. First operand 91472 states and 148615 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:58,329 INFO L93 Difference]: Finished difference Result 182712 states and 296850 transitions. [2021-12-22 11:53:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:53:58,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-12-22 11:53:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:58,618 INFO L225 Difference]: With dead ends: 182712 [2021-12-22 11:53:58,618 INFO L226 Difference]: Without dead ends: 91474 [2021-12-22 11:53:58,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:53:58,664 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 891 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:58,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 1994 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:53:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91474 states. [2021-12-22 11:54:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91474 to 91472. [2021-12-22 11:54:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91472 states, 91471 states have (on average 1.6178898230040122) internal successors, (147990), 91471 states have internal predecessors, (147990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:54:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91472 states to 91472 states and 147990 transitions. [2021-12-22 11:54:01,635 INFO L78 Accepts]: Start accepts. Automaton has 91472 states and 147990 transitions. Word has length 128 [2021-12-22 11:54:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:54:01,635 INFO L470 AbstractCegarLoop]: Abstraction has 91472 states and 147990 transitions. [2021-12-22 11:54:01,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:54:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 91472 states and 147990 transitions. [2021-12-22 11:54:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-22 11:54:01,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:54:01,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:54:01,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 11:54:01,637 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:54:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:54:01,637 INFO L85 PathProgramCache]: Analyzing trace with hash 967069717, now seen corresponding path program 1 times [2021-12-22 11:54:01,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:54:01,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404738548] [2021-12-22 11:54:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:54:01,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:54:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:54:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:54:01,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:54:01,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404738548] [2021-12-22 11:54:01,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404738548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:54:01,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:54:01,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:54:01,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079487278] [2021-12-22 11:54:01,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:54:01,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:54:01,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:54:01,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:54:01,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:54:01,757 INFO L87 Difference]: Start difference. First operand 91472 states and 147990 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:54:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:54:06,502 INFO L93 Difference]: Finished difference Result 267478 states and 433174 transitions. [2021-12-22 11:54:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:54:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-12-22 11:54:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:54:06,831 INFO L225 Difference]: With dead ends: 267478 [2021-12-22 11:54:06,832 INFO L226 Difference]: Without dead ends: 176240 [2021-12-22 11:54:06,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:54:06,902 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 699 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 2001 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:54:06,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 2001 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:54:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176240 states.