./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c82e02bad63eada28ee405f8cd74dfaf9484d0aadaa27f27fe076fa722fdcdb7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:29:24,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:29:24,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:29:24,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:29:24,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:29:24,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:29:24,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:29:24,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:29:24,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:29:24,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:29:24,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:29:24,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:29:24,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:29:24,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:29:24,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:29:24,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:29:24,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:29:24,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:29:24,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:29:24,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:29:24,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:29:24,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:29:24,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:29:24,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:29:24,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:29:24,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:29:24,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:29:24,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:29:24,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:29:24,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:29:24,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:29:24,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:29:24,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:29:24,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:29:24,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:29:24,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:29:24,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:29:24,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:29:24,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:29:24,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:29:24,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:29:24,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:29:24,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:29:24,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:29:24,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:29:24,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:29:24,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:29:24,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:29:24,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:29:24,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:29:24,473 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:29:24,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:29:24,474 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:29:24,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:29:24,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:29:24,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:29:24,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:29:24,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:29:24,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:29:24,475 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:29:24,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:29:24,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:29:24,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:29:24,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:29:24,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:29:24,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:29:24,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:29:24,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:29:24,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:29:24,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:29:24,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:29:24,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:29:24,478 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:29:24,478 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:29:24,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:29:24,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:29:24,478 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c82e02bad63eada28ee405f8cd74dfaf9484d0aadaa27f27fe076fa722fdcdb7 [2021-12-21 13:29:24,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:29:24,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:29:24,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:29:24,691 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:29:24,691 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:29:24,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c [2021-12-21 13:29:24,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af720724b/eaa48abad7684b8495e5e0a0350938ea/FLAG8ad011755 [2021-12-21 13:29:25,093 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:29:25,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c [2021-12-21 13:29:25,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af720724b/eaa48abad7684b8495e5e0a0350938ea/FLAG8ad011755 [2021-12-21 13:29:25,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af720724b/eaa48abad7684b8495e5e0a0350938ea [2021-12-21 13:29:25,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:29:25,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:29:25,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:29:25,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:29:25,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:29:25,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3b7933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25, skipping insertion in model container [2021-12-21 13:29:25,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:29:25,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:29:25,759 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c[16852,16865] [2021-12-21 13:29:25,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:29:25,775 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:29:25,838 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c[16852,16865] [2021-12-21 13:29:25,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:29:25,851 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:29:25,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25 WrapperNode [2021-12-21 13:29:25,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:29:25,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:29:25,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:29:25,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:29:25,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,909 INFO L137 Inliner]: procedures = 26, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 453 [2021-12-21 13:29:25,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:29:25,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:29:25,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:29:25,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:29:25,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:29:25,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:29:25,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:29:25,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:29:25,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25" (1/1) ... [2021-12-21 13:29:25,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:29:25,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:29:25,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 13:29:25,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 13:29:26,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:29:26,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:29:26,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:29:26,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:29:26,114 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:29:26,115 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:29:26,471 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:29:26,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:29:26,479 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 13:29:26,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:29:26 BoogieIcfgContainer [2021-12-21 13:29:26,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:29:26,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:29:26,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:29:26,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:29:26,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:29:25" (1/3) ... [2021-12-21 13:29:26,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0df2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:29:26, skipping insertion in model container [2021-12-21 13:29:26,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:29:25" (2/3) ... [2021-12-21 13:29:26,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0df2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:29:26, skipping insertion in model container [2021-12-21 13:29:26,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:29:26" (3/3) ... [2021-12-21 13:29:26,497 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c [2021-12-21 13:29:26,500 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:29:26,500 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:29:26,529 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:29:26,533 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 13:29:26,534 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:29:26,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 142 states have (on average 1.7183098591549295) internal successors, (244), 143 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 13:29:26,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:26,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:29:26,552 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:26,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1333844149, now seen corresponding path program 1 times [2021-12-21 13:29:26,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:26,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776670866] [2021-12-21 13:29:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:26,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:26,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776670866] [2021-12-21 13:29:26,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776670866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:26,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:26,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:29:26,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803239233] [2021-12-21 13:29:26,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:26,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:29:26,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:29:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:29:26,819 INFO L87 Difference]: Start difference. First operand has 144 states, 142 states have (on average 1.7183098591549295) internal successors, (244), 143 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:26,915 INFO L93 Difference]: Finished difference Result 241 states and 401 transitions. [2021-12-21 13:29:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:29:26,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-21 13:29:26,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:26,926 INFO L225 Difference]: With dead ends: 241 [2021-12-21 13:29:26,926 INFO L226 Difference]: Without dead ends: 140 [2021-12-21 13:29:26,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:29:26,932 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 3 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:26,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 896 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:26,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-21 13:29:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-12-21 13:29:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.410071942446043) internal successors, (196), 139 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 196 transitions. [2021-12-21 13:29:26,970 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 196 transitions. Word has length 37 [2021-12-21 13:29:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:26,970 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 196 transitions. [2021-12-21 13:29:26,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 196 transitions. [2021-12-21 13:29:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 13:29:26,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:26,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:29:26,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:29:26,977 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:26,979 INFO L85 PathProgramCache]: Analyzing trace with hash -976812523, now seen corresponding path program 1 times [2021-12-21 13:29:26,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:26,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649671784] [2021-12-21 13:29:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:26,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:27,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:27,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649671784] [2021-12-21 13:29:27,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649671784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:27,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:27,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:27,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046425865] [2021-12-21 13:29:27,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:27,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:27,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:27,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:27,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:27,113 INFO L87 Difference]: Start difference. First operand 140 states and 196 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-12-21 13:29:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:27,140 INFO L93 Difference]: Finished difference Result 314 states and 474 transitions. [2021-12-21 13:29:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:27,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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 [2021-12-21 13:29:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:27,143 INFO L225 Difference]: With dead ends: 314 [2021-12-21 13:29:27,144 INFO L226 Difference]: Without dead ends: 221 [2021-12-21 13:29:27,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:27,146 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 133 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:27,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 444 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-21 13:29:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2021-12-21 13:29:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.481651376146789) internal successors, (323), 218 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 323 transitions. [2021-12-21 13:29:27,163 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 323 transitions. Word has length 77 [2021-12-21 13:29:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:27,165 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 323 transitions. [2021-12-21 13:29:27,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-12-21 13:29:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 323 transitions. [2021-12-21 13:29:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 13:29:27,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:27,169 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] [2021-12-21 13:29:27,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:29:27,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:27,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:27,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1251497554, now seen corresponding path program 1 times [2021-12-21 13:29:27,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:27,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982815051] [2021-12-21 13:29:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:27,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:27,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:27,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982815051] [2021-12-21 13:29:27,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982815051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:27,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:27,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:27,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536977821] [2021-12-21 13:29:27,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:27,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:27,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:27,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:27,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:27,272 INFO L87 Difference]: Start difference. First operand 219 states and 323 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:27,288 INFO L93 Difference]: Finished difference Result 539 states and 835 transitions. [2021-12-21 13:29:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-21 13:29:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:27,292 INFO L225 Difference]: With dead ends: 539 [2021-12-21 13:29:27,292 INFO L226 Difference]: Without dead ends: 367 [2021-12-21 13:29:27,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:27,295 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 128 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:27,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 435 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-21 13:29:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-12-21 13:29:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.5274725274725274) internal successors, (556), 364 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 556 transitions. [2021-12-21 13:29:27,319 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 556 transitions. Word has length 78 [2021-12-21 13:29:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:27,320 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 556 transitions. [2021-12-21 13:29:27,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,321 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 556 transitions. [2021-12-21 13:29:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 13:29:27,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:27,322 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] [2021-12-21 13:29:27,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:29:27,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:27,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:27,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2103523781, now seen corresponding path program 1 times [2021-12-21 13:29:27,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:27,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514561660] [2021-12-21 13:29:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:27,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:27,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:27,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514561660] [2021-12-21 13:29:27,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514561660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:27,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:27,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:27,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196167246] [2021-12-21 13:29:27,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:27,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:27,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:27,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:27,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:27,401 INFO L87 Difference]: Start difference. First operand 365 states and 556 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:27,424 INFO L93 Difference]: Finished difference Result 953 states and 1494 transitions. [2021-12-21 13:29:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:27,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-21 13:29:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:27,427 INFO L225 Difference]: With dead ends: 953 [2021-12-21 13:29:27,429 INFO L226 Difference]: Without dead ends: 635 [2021-12-21 13:29:27,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:27,431 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 123 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:27,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 426 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-12-21 13:29:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 633. [2021-12-21 13:29:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 1.5506329113924051) internal successors, (980), 632 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 980 transitions. [2021-12-21 13:29:27,465 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 980 transitions. Word has length 79 [2021-12-21 13:29:27,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:27,467 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 980 transitions. [2021-12-21 13:29:27,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,467 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 980 transitions. [2021-12-21 13:29:27,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-21 13:29:27,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:27,468 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] [2021-12-21 13:29:27,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:29:27,468 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash -508152546, now seen corresponding path program 1 times [2021-12-21 13:29:27,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:27,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728964967] [2021-12-21 13:29:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:27,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:27,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728964967] [2021-12-21 13:29:27,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728964967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:27,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:27,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:27,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971474725] [2021-12-21 13:29:27,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:27,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:27,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:27,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:27,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:27,544 INFO L87 Difference]: Start difference. First operand 633 states and 980 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:27,570 INFO L93 Difference]: Finished difference Result 1709 states and 2686 transitions. [2021-12-21 13:29:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:27,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-21 13:29:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:27,574 INFO L225 Difference]: With dead ends: 1709 [2021-12-21 13:29:27,574 INFO L226 Difference]: Without dead ends: 1123 [2021-12-21 13:29:27,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:27,575 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 118 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:27,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 417 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-12-21 13:29:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1121. [2021-12-21 13:29:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.5571428571428572) internal successors, (1744), 1120 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1744 transitions. [2021-12-21 13:29:27,599 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1744 transitions. Word has length 80 [2021-12-21 13:29:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:27,600 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1744 transitions. [2021-12-21 13:29:27,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1744 transitions. [2021-12-21 13:29:27,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-21 13:29:27,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:27,601 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] [2021-12-21 13:29:27,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:29:27,601 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1230501237, now seen corresponding path program 1 times [2021-12-21 13:29:27,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:27,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919047367] [2021-12-21 13:29:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:27,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:27,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:27,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919047367] [2021-12-21 13:29:27,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919047367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:27,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:27,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:27,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255788780] [2021-12-21 13:29:27,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:27,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:27,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:27,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:27,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:27,637 INFO L87 Difference]: Start difference. First operand 1121 states and 1744 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:27,694 INFO L93 Difference]: Finished difference Result 3077 states and 4818 transitions. [2021-12-21 13:29:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:27,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-21 13:29:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:27,700 INFO L225 Difference]: With dead ends: 3077 [2021-12-21 13:29:27,700 INFO L226 Difference]: Without dead ends: 2003 [2021-12-21 13:29:27,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:27,702 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 113 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:27,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 408 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-12-21 13:29:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 2001. [2021-12-21 13:29:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 1.552) internal successors, (3104), 2000 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 3104 transitions. [2021-12-21 13:29:27,759 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 3104 transitions. Word has length 81 [2021-12-21 13:29:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:27,759 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 3104 transitions. [2021-12-21 13:29:27,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 3104 transitions. [2021-12-21 13:29:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 13:29:27,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:27,762 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] [2021-12-21 13:29:27,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:29:27,763 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:27,763 INFO L85 PathProgramCache]: Analyzing trace with hash -937142130, now seen corresponding path program 1 times [2021-12-21 13:29:27,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:27,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326259207] [2021-12-21 13:29:27,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:27,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:27,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:27,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326259207] [2021-12-21 13:29:27,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326259207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:27,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:27,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:29:27,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162096004] [2021-12-21 13:29:27,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:27,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:29:27,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:29:27,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:29:27,847 INFO L87 Difference]: Start difference. First operand 2001 states and 3104 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:28,340 INFO L93 Difference]: Finished difference Result 15679 states and 24503 transitions. [2021-12-21 13:29:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:29:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-21 13:29:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:28,380 INFO L225 Difference]: With dead ends: 15679 [2021-12-21 13:29:28,381 INFO L226 Difference]: Without dead ends: 13725 [2021-12-21 13:29:28,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:29:28,387 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 1747 mSDsluCounter, 2742 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1747 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:28,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1747 Valid, 2936 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:29:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13725 states. [2021-12-21 13:29:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13725 to 3953. [2021-12-21 13:29:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 1.54251012145749) internal successors, (6096), 3952 states have internal predecessors, (6096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 6096 transitions. [2021-12-21 13:29:28,651 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 6096 transitions. Word has length 82 [2021-12-21 13:29:28,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:28,652 INFO L470 AbstractCegarLoop]: Abstraction has 3953 states and 6096 transitions. [2021-12-21 13:29:28,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:28,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 6096 transitions. [2021-12-21 13:29:28,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 13:29:28,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:28,654 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] [2021-12-21 13:29:28,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:29:28,654 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash 630041935, now seen corresponding path program 1 times [2021-12-21 13:29:28,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:28,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157066332] [2021-12-21 13:29:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:28,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:28,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:28,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157066332] [2021-12-21 13:29:28,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157066332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:28,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:28,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:29:28,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485338525] [2021-12-21 13:29:28,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:28,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:29:28,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:29:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:29:28,790 INFO L87 Difference]: Start difference. First operand 3953 states and 6096 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:30,089 INFO L93 Difference]: Finished difference Result 24989 states and 38230 transitions. [2021-12-21 13:29:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:29:30,090 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-12-21 13:29:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:30,148 INFO L225 Difference]: With dead ends: 24989 [2021-12-21 13:29:30,149 INFO L226 Difference]: Without dead ends: 21083 [2021-12-21 13:29:30,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:29:30,159 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 881 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:30,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 1156 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:29:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21083 states. [2021-12-21 13:29:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21083 to 21073. [2021-12-21 13:29:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21073 states, 21072 states have (on average 1.5239179954441913) internal successors, (32112), 21072 states have internal predecessors, (32112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21073 states to 21073 states and 32112 transitions. [2021-12-21 13:29:31,258 INFO L78 Accepts]: Start accepts. Automaton has 21073 states and 32112 transitions. Word has length 83 [2021-12-21 13:29:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:31,258 INFO L470 AbstractCegarLoop]: Abstraction has 21073 states and 32112 transitions. [2021-12-21 13:29:31,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 21073 states and 32112 transitions. [2021-12-21 13:29:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 13:29:31,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:31,260 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] [2021-12-21 13:29:31,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:29:31,261 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:31,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1487130877, now seen corresponding path program 1 times [2021-12-21 13:29:31,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:31,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171431545] [2021-12-21 13:29:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:31,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:31,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171431545] [2021-12-21 13:29:31,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171431545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:31,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:31,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:29:31,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686724013] [2021-12-21 13:29:31,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:31,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:29:31,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:31,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:29:31,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:29:31,324 INFO L87 Difference]: Start difference. First operand 21073 states and 32112 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:33,157 INFO L93 Difference]: Finished difference Result 43635 states and 65713 transitions. [2021-12-21 13:29:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:29:33,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-21 13:29:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:33,251 INFO L225 Difference]: With dead ends: 43635 [2021-12-21 13:29:33,251 INFO L226 Difference]: Without dead ends: 43633 [2021-12-21 13:29:33,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:29:33,264 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 426 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:33,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 870 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43633 states. [2021-12-21 13:29:34,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43633 to 22225. [2021-12-21 13:29:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22225 states, 22224 states have (on average 1.4967602591792657) internal successors, (33264), 22224 states have internal predecessors, (33264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22225 states to 22225 states and 33264 transitions. [2021-12-21 13:29:34,761 INFO L78 Accepts]: Start accepts. Automaton has 22225 states and 33264 transitions. Word has length 84 [2021-12-21 13:29:34,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:34,761 INFO L470 AbstractCegarLoop]: Abstraction has 22225 states and 33264 transitions. [2021-12-21 13:29:34,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:34,762 INFO L276 IsEmpty]: Start isEmpty. Operand 22225 states and 33264 transitions. [2021-12-21 13:29:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-21 13:29:34,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:34,763 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] [2021-12-21 13:29:34,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:29:34,764 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:34,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1091004264, now seen corresponding path program 1 times [2021-12-21 13:29:34,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:34,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796792569] [2021-12-21 13:29:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:34,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:34,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796792569] [2021-12-21 13:29:34,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796792569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:34,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:34,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:34,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221400425] [2021-12-21 13:29:34,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:34,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:34,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:34,834 INFO L87 Difference]: Start difference. First operand 22225 states and 33264 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:36,813 INFO L93 Difference]: Finished difference Result 62165 states and 92658 transitions. [2021-12-21 13:29:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-12-21 13:29:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:36,873 INFO L225 Difference]: With dead ends: 62165 [2021-12-21 13:29:36,874 INFO L226 Difference]: Without dead ends: 39987 [2021-12-21 13:29:36,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:36,903 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 103 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:36,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 340 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39987 states. [2021-12-21 13:29:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39987 to 39633. [2021-12-21 13:29:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39633 states, 39632 states have (on average 1.4731530076705692) internal successors, (58384), 39632 states have internal predecessors, (58384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:39,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39633 states to 39633 states and 58384 transitions. [2021-12-21 13:29:39,130 INFO L78 Accepts]: Start accepts. Automaton has 39633 states and 58384 transitions. Word has length 85 [2021-12-21 13:29:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:39,131 INFO L470 AbstractCegarLoop]: Abstraction has 39633 states and 58384 transitions. [2021-12-21 13:29:39,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 39633 states and 58384 transitions. [2021-12-21 13:29:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-21 13:29:39,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:39,137 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] [2021-12-21 13:29:39,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:29:39,138 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:39,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1624392677, now seen corresponding path program 1 times [2021-12-21 13:29:39,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:39,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788030368] [2021-12-21 13:29:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:39,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:39,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:39,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788030368] [2021-12-21 13:29:39,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788030368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:39,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:39,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:39,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5080495] [2021-12-21 13:29:39,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:39,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:39,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:39,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:39,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:39,178 INFO L87 Difference]: Start difference. First operand 39633 states and 58384 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:41,897 INFO L93 Difference]: Finished difference Result 79768 states and 117910 transitions. [2021-12-21 13:29:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:29:41,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-12-21 13:29:41,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:42,053 INFO L225 Difference]: With dead ends: 79768 [2021-12-21 13:29:42,054 INFO L226 Difference]: Without dead ends: 57589 [2021-12-21 13:29:42,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:42,080 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 134 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:42,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 465 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:29:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57589 states. [2021-12-21 13:29:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57589 to 57587. [2021-12-21 13:29:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57587 states, 57586 states have (on average 1.4640016670718576) internal successors, (84306), 57586 states have internal predecessors, (84306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57587 states to 57587 states and 84306 transitions. [2021-12-21 13:29:45,615 INFO L78 Accepts]: Start accepts. Automaton has 57587 states and 84306 transitions. Word has length 86 [2021-12-21 13:29:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:45,615 INFO L470 AbstractCegarLoop]: Abstraction has 57587 states and 84306 transitions. [2021-12-21 13:29:45,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 57587 states and 84306 transitions. [2021-12-21 13:29:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-21 13:29:45,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:45,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:29:45,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:29:45,637 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:45,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2050835095, now seen corresponding path program 1 times [2021-12-21 13:29:45,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:45,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971252970] [2021-12-21 13:29:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:45,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 13:29:45,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:45,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971252970] [2021-12-21 13:29:45,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971252970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:45,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:45,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:29:45,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565871541] [2021-12-21 13:29:45,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:45,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:29:45,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:45,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:29:45,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:29:45,720 INFO L87 Difference]: Start difference. First operand 57587 states and 84306 transitions. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:29:52,485 INFO L93 Difference]: Finished difference Result 151601 states and 224249 transitions. [2021-12-21 13:29:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:29:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-21 13:29:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:29:52,714 INFO L225 Difference]: With dead ends: 151601 [2021-12-21 13:29:52,715 INFO L226 Difference]: Without dead ends: 126399 [2021-12-21 13:29:52,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:29:52,760 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 1521 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:29:52,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 2249 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:29:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126399 states. [2021-12-21 13:29:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126399 to 80787. [2021-12-21 13:29:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80787 states, 80786 states have (on average 1.4650310697398063) internal successors, (118354), 80786 states have internal predecessors, (118354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80787 states to 80787 states and 118354 transitions. [2021-12-21 13:29:58,109 INFO L78 Accepts]: Start accepts. Automaton has 80787 states and 118354 transitions. Word has length 117 [2021-12-21 13:29:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:29:58,109 INFO L470 AbstractCegarLoop]: Abstraction has 80787 states and 118354 transitions. [2021-12-21 13:29:58,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:29:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 80787 states and 118354 transitions. [2021-12-21 13:29:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-21 13:29:58,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:29:58,147 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:29:58,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:29:58,148 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:29:58,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:29:58,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1501711577, now seen corresponding path program 1 times [2021-12-21 13:29:58,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:29:58,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291561450] [2021-12-21 13:29:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:29:58,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:29:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:29:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:29:58,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:29:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291561450] [2021-12-21 13:29:58,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291561450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:29:58,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:29:58,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:29:58,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035429077] [2021-12-21 13:29:58,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:29:58,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:29:58,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:29:58,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:29:58,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:29:58,182 INFO L87 Difference]: Start difference. First operand 80787 states and 118354 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:30:05,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:30:05,592 INFO L93 Difference]: Finished difference Result 192063 states and 281365 transitions. [2021-12-21 13:30:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:30:05,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-12-21 13:30:05,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:30:05,798 INFO L225 Difference]: With dead ends: 192063 [2021-12-21 13:30:05,798 INFO L226 Difference]: Without dead ends: 131197 [2021-12-21 13:30:05,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:30:05,838 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 104 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:30:05,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 402 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:30:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131197 states.