./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6374c4e2c0297c3123cfdf0954bdc9362f3fda9d9942785abd7924d756030a0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:52:33,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:52:33,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:52:33,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:52:33,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:52:33,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:52:33,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:52:33,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:52:33,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:52:33,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:52:33,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:52:33,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:52:33,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:52:33,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:52:33,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:52:33,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:52:33,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:52:33,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:52:33,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:52:33,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:52:33,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:52:33,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:52:33,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:52:33,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:52:33,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:52:33,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:52:33,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:52:33,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:52:33,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:52:33,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:52:33,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:52:33,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:52:33,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:52:33,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:52:33,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:52:33,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:52:33,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:52:33,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:52:33,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:52:33,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:52:33,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:52:33,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:52:33,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:52:33,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:52:33,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:52:33,515 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:52:33,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:52:33,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:52:33,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:52:33,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:52:33,521 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:52:33,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:52:33,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:52:33,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:52:33,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:52:33,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:52:33,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:52:33,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:52:33,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:52:33,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:52:33,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:52:33,524 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:52:33,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:52:33,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:52:33,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:52:33,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:52:33,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:52:33,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:52:33,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:52:33,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:52:33,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:52:33,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:52:33,527 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:52:33,527 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:52:33,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:52:33,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:52:33,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6374c4e2c0297c3123cfdf0954bdc9362f3fda9d9942785abd7924d756030a0 [2021-12-21 13:52:33,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:52:33,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:52:33,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:52:33,745 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:52:33,746 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:52:33,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:52:33,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29777a6a3/f6658258b1b84bb4a0d01741e4f8b8be/FLAGd54c6316c [2021-12-21 13:52:34,285 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:52:34,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:52:34,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29777a6a3/f6658258b1b84bb4a0d01741e4f8b8be/FLAGd54c6316c [2021-12-21 13:52:34,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29777a6a3/f6658258b1b84bb4a0d01741e4f8b8be [2021-12-21 13:52:34,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:52:34,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:52:34,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:52:34,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:52:34,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:52:34,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:52:34" (1/1) ... [2021-12-21 13:52:34,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31283316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:34, skipping insertion in model container [2021-12-21 13:52:34,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:52:34" (1/1) ... [2021-12-21 13:52:34,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:52:34,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:52:35,043 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9092,9105] [2021-12-21 13:52:35,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:52:35,093 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:52:35,136 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9092,9105] [2021-12-21 13:52:35,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:52:35,210 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:52:35,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35 WrapperNode [2021-12-21 13:52:35,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:52:35,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:52:35,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:52:35,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:52:35,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35" (1/1) ... [2021-12-21 13:52:35,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35" (1/1) ... [2021-12-21 13:52:35,270 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 729 [2021-12-21 13:52:35,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:52:35,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:52:35,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:52:35,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:52:35,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35" (1/1) ... [2021-12-21 13:52:35,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35" (1/1) ... [2021-12-21 13:52:35,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35" (1/1) ... [2021-12-21 13:52:35,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35" (1/1) ... [2021-12-21 13:52:35,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35" (1/1) ... [2021-12-21 13:52:35,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35" (1/1) ... [2021-12-21 13:52:35,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35" (1/1) ... [2021-12-21 13:52:35,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:52:35,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:52:35,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:52:35,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:52:35,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35" (1/1) ... [2021-12-21 13:52:35,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:52:35,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:52:35,346 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 13:52:35,372 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 13:52:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:52:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:52:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:52:35,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:52:35,508 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:52:35,509 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:52:36,014 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:52:36,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:52:36,022 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 13:52:36,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:52:36 BoogieIcfgContainer [2021-12-21 13:52:36,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:52:36,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:52:36,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:52:36,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:52:36,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:52:34" (1/3) ... [2021-12-21 13:52:36,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786f71ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:52:36, skipping insertion in model container [2021-12-21 13:52:36,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:52:35" (2/3) ... [2021-12-21 13:52:36,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786f71ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:52:36, skipping insertion in model container [2021-12-21 13:52:36,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:52:36" (3/3) ... [2021-12-21 13:52:36,032 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-21 13:52:36,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:52:36,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:52:36,074 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:52:36,080 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 13:52:36,080 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:52:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 175 states have (on average 1.76) internal successors, (308), 176 states have internal predecessors, (308), 0 states have call successors, (0), 0 states 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 13:52:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 13:52:36,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:36,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:36,116 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash -822713823, now seen corresponding path program 1 times [2021-12-21 13:52:36,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:36,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157798342] [2021-12-21 13:52:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:36,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:36,564 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 13:52:36,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:36,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157798342] [2021-12-21 13:52:36,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157798342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:36,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:36,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:52:36,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608064188] [2021-12-21 13:52:36,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:36,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:52:36,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:36,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:52:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:52:36,608 INFO L87 Difference]: Start difference. First operand has 177 states, 175 states have (on average 1.76) internal successors, (308), 176 states have internal predecessors, (308), 0 states have call successors, (0), 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 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 13:52:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:37,152 INFO L93 Difference]: Finished difference Result 1131 states and 1831 transitions. [2021-12-21 13:52:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 13:52:37,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-21 13:52:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:37,179 INFO L225 Difference]: With dead ends: 1131 [2021-12-21 13:52:37,180 INFO L226 Difference]: Without dead ends: 1036 [2021-12-21 13:52:37,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:52:37,189 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 2265 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2265 SdHoareTripleChecker+Valid, 3100 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:37,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2265 Valid, 3100 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:52:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-12-21 13:52:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 269. [2021-12-21 13:52:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.458955223880597) internal successors, (391), 268 states have internal predecessors, (391), 0 states have call successors, (0), 0 states 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 13:52:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 391 transitions. [2021-12-21 13:52:37,266 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 391 transitions. Word has length 90 [2021-12-21 13:52:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:37,267 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 391 transitions. [2021-12-21 13:52:37,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 13:52:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 391 transitions. [2021-12-21 13:52:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:52:37,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:37,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:37,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:52:37,270 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1483332975, now seen corresponding path program 1 times [2021-12-21 13:52:37,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:37,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961648495] [2021-12-21 13:52:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:37,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:37,465 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 13:52:37,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:37,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961648495] [2021-12-21 13:52:37,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961648495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:37,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:37,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:52:37,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315596542] [2021-12-21 13:52:37,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:37,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:52:37,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:52:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:52:37,469 INFO L87 Difference]: Start difference. First operand 269 states and 391 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:37,781 INFO L93 Difference]: Finished difference Result 1235 states and 1925 transitions. [2021-12-21 13:52:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:52:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-21 13:52:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:37,787 INFO L225 Difference]: With dead ends: 1235 [2021-12-21 13:52:37,788 INFO L226 Difference]: Without dead ends: 1095 [2021-12-21 13:52:37,793 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 13:52:37,795 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 1605 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 1854 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:37,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 1854 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-12-21 13:52:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 428. [2021-12-21 13:52:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.5105386416861826) internal successors, (645), 427 states have internal predecessors, (645), 0 states have call successors, (0), 0 states 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 13:52:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 645 transitions. [2021-12-21 13:52:37,861 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 645 transitions. Word has length 92 [2021-12-21 13:52:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:37,862 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 645 transitions. [2021-12-21 13:52:37,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 645 transitions. [2021-12-21 13:52:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:52:37,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:37,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:37,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:52:37,873 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:37,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1617802447, now seen corresponding path program 1 times [2021-12-21 13:52:37,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:37,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384779664] [2021-12-21 13:52:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:37,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:38,011 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 13:52:38,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:38,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384779664] [2021-12-21 13:52:38,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384779664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:38,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:38,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:52:38,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001402100] [2021-12-21 13:52:38,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:38,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:52:38,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:38,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:52:38,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:52:38,015 INFO L87 Difference]: Start difference. First operand 428 states and 645 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:38,287 INFO L93 Difference]: Finished difference Result 1389 states and 2171 transitions. [2021-12-21 13:52:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:52:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-21 13:52:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:38,292 INFO L225 Difference]: With dead ends: 1389 [2021-12-21 13:52:38,293 INFO L226 Difference]: Without dead ends: 1249 [2021-12-21 13:52:38,293 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 13:52:38,294 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 1908 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1908 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:38,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1908 Valid, 1591 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-12-21 13:52:38,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 641. [2021-12-21 13:52:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 1.5390625) internal successors, (985), 640 states have internal predecessors, (985), 0 states have call successors, (0), 0 states 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 13:52:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 985 transitions. [2021-12-21 13:52:38,368 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 985 transitions. Word has length 92 [2021-12-21 13:52:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:38,369 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 985 transitions. [2021-12-21 13:52:38,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 985 transitions. [2021-12-21 13:52:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:52:38,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:38,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:38,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:52:38,375 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1906062023, now seen corresponding path program 1 times [2021-12-21 13:52:38,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:38,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945560611] [2021-12-21 13:52:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:38,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:38,515 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 13:52:38,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:38,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945560611] [2021-12-21 13:52:38,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945560611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:38,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:38,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:52:38,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454523509] [2021-12-21 13:52:38,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:38,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:52:38,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:38,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:52:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:52:38,519 INFO L87 Difference]: Start difference. First operand 641 states and 985 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:38,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:38,798 INFO L93 Difference]: Finished difference Result 1528 states and 2393 transitions. [2021-12-21 13:52:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:52:38,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-21 13:52:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:38,805 INFO L225 Difference]: With dead ends: 1528 [2021-12-21 13:52:38,806 INFO L226 Difference]: Without dead ends: 1388 [2021-12-21 13:52:38,810 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 13:52:38,817 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 2019 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:38,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2019 Valid, 1591 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-12-21 13:52:38,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 780. [2021-12-21 13:52:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 1.5494223363286264) internal successors, (1207), 779 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states 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 13:52:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1207 transitions. [2021-12-21 13:52:38,914 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1207 transitions. Word has length 92 [2021-12-21 13:52:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:38,914 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 1207 transitions. [2021-12-21 13:52:38,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1207 transitions. [2021-12-21 13:52:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:52:38,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:38,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:38,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:52:38,919 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash 614894983, now seen corresponding path program 1 times [2021-12-21 13:52:38,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:38,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219064202] [2021-12-21 13:52:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:38,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:38,992 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 13:52:38,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:38,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219064202] [2021-12-21 13:52:38,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219064202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:38,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:38,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:52:38,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336427854] [2021-12-21 13:52:38,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:38,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:52:38,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:38,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:52:38,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:52:38,996 INFO L87 Difference]: Start difference. First operand 780 states and 1207 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:39,191 INFO L93 Difference]: Finished difference Result 1968 states and 3097 transitions. [2021-12-21 13:52:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:52:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-21 13:52:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:39,197 INFO L225 Difference]: With dead ends: 1968 [2021-12-21 13:52:39,197 INFO L226 Difference]: Without dead ends: 1345 [2021-12-21 13:52:39,198 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 13:52:39,199 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 99 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:39,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 559 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:52:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-12-21 13:52:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1325. [2021-12-21 13:52:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 1.5521148036253776) internal successors, (2055), 1324 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states 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 13:52:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2055 transitions. [2021-12-21 13:52:39,364 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2055 transitions. Word has length 92 [2021-12-21 13:52:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:39,365 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 2055 transitions. [2021-12-21 13:52:39,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:39,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2055 transitions. [2021-12-21 13:52:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:52:39,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:39,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:39,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:52:39,370 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:39,371 INFO L85 PathProgramCache]: Analyzing trace with hash 858972646, now seen corresponding path program 1 times [2021-12-21 13:52:39,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:39,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963096313] [2021-12-21 13:52:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:39,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:39,444 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 13:52:39,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963096313] [2021-12-21 13:52:39,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963096313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:39,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:39,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:52:39,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756251311] [2021-12-21 13:52:39,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:39,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:52:39,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:39,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:52:39,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:52:39,447 INFO L87 Difference]: Start difference. First operand 1325 states and 2055 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:39,613 INFO L93 Difference]: Finished difference Result 2495 states and 3900 transitions. [2021-12-21 13:52:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:52:39,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-21 13:52:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:39,625 INFO L225 Difference]: With dead ends: 2495 [2021-12-21 13:52:39,625 INFO L226 Difference]: Without dead ends: 1327 [2021-12-21 13:52:39,627 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 13:52:39,627 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 125 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:39,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 541 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:52:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-12-21 13:52:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1325. [2021-12-21 13:52:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 1.5483383685800605) internal successors, (2050), 1324 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states 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 13:52:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2050 transitions. [2021-12-21 13:52:39,787 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2050 transitions. Word has length 92 [2021-12-21 13:52:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:39,787 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 2050 transitions. [2021-12-21 13:52:39,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2050 transitions. [2021-12-21 13:52:39,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:52:39,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:39,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:39,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:52:39,789 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:39,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1799043301, now seen corresponding path program 1 times [2021-12-21 13:52:39,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:39,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812282844] [2021-12-21 13:52:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:39,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:39,887 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 13:52:39,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:39,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812282844] [2021-12-21 13:52:39,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812282844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:39,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:39,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:52:39,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851913315] [2021-12-21 13:52:39,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:39,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:52:39,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:39,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:52:39,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:52:39,890 INFO L87 Difference]: Start difference. First operand 1325 states and 2050 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:40,307 INFO L93 Difference]: Finished difference Result 2943 states and 4594 transitions. [2021-12-21 13:52:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:52:40,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-21 13:52:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:40,317 INFO L225 Difference]: With dead ends: 2943 [2021-12-21 13:52:40,317 INFO L226 Difference]: Without dead ends: 2682 [2021-12-21 13:52:40,318 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 13:52:40,319 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 1557 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:40,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 1901 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-12-21 13:52:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1595. [2021-12-21 13:52:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 1.552697616060226) internal successors, (2475), 1594 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states 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 13:52:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2475 transitions. [2021-12-21 13:52:40,504 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2475 transitions. Word has length 92 [2021-12-21 13:52:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:40,505 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2475 transitions. [2021-12-21 13:52:40,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2475 transitions. [2021-12-21 13:52:40,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:52:40,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:40,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:40,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:52:40,507 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:40,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:40,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1982868957, now seen corresponding path program 1 times [2021-12-21 13:52:40,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:40,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237221190] [2021-12-21 13:52:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:40,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:40,608 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 13:52:40,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:40,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237221190] [2021-12-21 13:52:40,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237221190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:40,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:40,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:52:40,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480343892] [2021-12-21 13:52:40,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:40,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:52:40,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:40,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:52:40,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:52:40,611 INFO L87 Difference]: Start difference. First operand 1595 states and 2475 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:41,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:41,084 INFO L93 Difference]: Finished difference Result 3213 states and 5019 transitions. [2021-12-21 13:52:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:52:41,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-21 13:52:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:41,094 INFO L225 Difference]: With dead ends: 3213 [2021-12-21 13:52:41,094 INFO L226 Difference]: Without dead ends: 2952 [2021-12-21 13:52:41,095 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 13:52:41,096 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 1752 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1752 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:41,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1752 Valid, 2283 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:41,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2021-12-21 13:52:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 1870. [2021-12-21 13:52:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.555912252541466) internal successors, (2908), 1869 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states 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 13:52:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2908 transitions. [2021-12-21 13:52:41,338 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2908 transitions. Word has length 92 [2021-12-21 13:52:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:41,339 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2908 transitions. [2021-12-21 13:52:41,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2908 transitions. [2021-12-21 13:52:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:52:41,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:41,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:41,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:52:41,341 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash -820597111, now seen corresponding path program 1 times [2021-12-21 13:52:41,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:41,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081903849] [2021-12-21 13:52:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:41,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:41,425 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 13:52:41,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:41,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081903849] [2021-12-21 13:52:41,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081903849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:41,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:41,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:52:41,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672407506] [2021-12-21 13:52:41,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:41,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:52:41,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:41,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:52:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:52:41,427 INFO L87 Difference]: Start difference. First operand 1870 states and 2908 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:42,012 INFO L93 Difference]: Finished difference Result 3493 states and 5460 transitions. [2021-12-21 13:52:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:52:42,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-21 13:52:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:42,025 INFO L225 Difference]: With dead ends: 3493 [2021-12-21 13:52:42,025 INFO L226 Difference]: Without dead ends: 3232 [2021-12-21 13:52:42,026 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 13:52:42,027 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 2004 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2004 SdHoareTripleChecker+Valid, 1924 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:42,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2004 Valid, 1924 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-12-21 13:52:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 2150. [2021-12-21 13:52:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.5583992554676593) internal successors, (3349), 2149 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states 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 13:52:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3349 transitions. [2021-12-21 13:52:42,323 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3349 transitions. Word has length 92 [2021-12-21 13:52:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:42,323 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3349 transitions. [2021-12-21 13:52:42,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3349 transitions. [2021-12-21 13:52:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 13:52:42,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:42,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:42,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:52:42,325 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:42,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:42,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2115523499, now seen corresponding path program 1 times [2021-12-21 13:52:42,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:42,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046194043] [2021-12-21 13:52:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:42,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:42,384 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 13:52:42,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:42,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046194043] [2021-12-21 13:52:42,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046194043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:42,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:42,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:52:42,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304762824] [2021-12-21 13:52:42,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:42,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:52:42,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:42,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:52:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:52:42,386 INFO L87 Difference]: Start difference. First operand 2150 states and 3349 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:42,807 INFO L93 Difference]: Finished difference Result 4250 states and 6646 transitions. [2021-12-21 13:52:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:52:42,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-21 13:52:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:42,815 INFO L225 Difference]: With dead ends: 4250 [2021-12-21 13:52:42,816 INFO L226 Difference]: Without dead ends: 2150 [2021-12-21 13:52:42,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:52:42,819 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 645 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:42,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 140 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-12-21 13:52:43,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 2150. [2021-12-21 13:52:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.5439739413680782) internal successors, (3318), 2149 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states 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 13:52:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3318 transitions. [2021-12-21 13:52:43,151 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3318 transitions. Word has length 93 [2021-12-21 13:52:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:43,152 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3318 transitions. [2021-12-21 13:52:43,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3318 transitions. [2021-12-21 13:52:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-21 13:52:43,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:43,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:43,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:52:43,154 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:43,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1622736142, now seen corresponding path program 1 times [2021-12-21 13:52:43,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:43,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353471309] [2021-12-21 13:52:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:43,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:43,216 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 13:52:43,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:43,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353471309] [2021-12-21 13:52:43,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353471309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:43,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:43,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:52:43,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711977562] [2021-12-21 13:52:43,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:43,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:52:43,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:43,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:52:43,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:52:43,219 INFO L87 Difference]: Start difference. First operand 2150 states and 3318 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:43,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:43,660 INFO L93 Difference]: Finished difference Result 4254 states and 6589 transitions. [2021-12-21 13:52:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:52:43,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-12-21 13:52:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:43,669 INFO L225 Difference]: With dead ends: 4254 [2021-12-21 13:52:43,669 INFO L226 Difference]: Without dead ends: 2150 [2021-12-21 13:52:43,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:52:43,673 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 650 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:43,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 132 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-12-21 13:52:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 2150. [2021-12-21 13:52:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.529548627268497) internal successors, (3287), 2149 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states 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 13:52:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3287 transitions. [2021-12-21 13:52:43,987 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3287 transitions. Word has length 94 [2021-12-21 13:52:43,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:43,987 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3287 transitions. [2021-12-21 13:52:43,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3287 transitions. [2021-12-21 13:52:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 13:52:43,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:43,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:43,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:52:43,989 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:43,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash -514732393, now seen corresponding path program 1 times [2021-12-21 13:52:43,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:43,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936381837] [2021-12-21 13:52:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:43,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:44,043 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 13:52:44,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:44,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936381837] [2021-12-21 13:52:44,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936381837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:44,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:44,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:52:44,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408766528] [2021-12-21 13:52:44,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:44,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:52:44,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:44,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:52:44,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:52:44,045 INFO L87 Difference]: Start difference. First operand 2150 states and 3287 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 13:52:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:44,481 INFO L93 Difference]: Finished difference Result 4238 states and 6509 transitions. [2021-12-21 13:52:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:52:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-12-21 13:52:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:44,490 INFO L225 Difference]: With dead ends: 4238 [2021-12-21 13:52:44,490 INFO L226 Difference]: Without dead ends: 2150 [2021-12-21 13:52:44,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:52:44,494 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 598 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:44,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 164 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:44,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-12-21 13:52:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 2150. [2021-12-21 13:52:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.5151233131689157) internal successors, (3256), 2149 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states 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 13:52:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3256 transitions. [2021-12-21 13:52:44,829 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3256 transitions. Word has length 95 [2021-12-21 13:52:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:44,829 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3256 transitions. [2021-12-21 13:52:44,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 13:52:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3256 transitions. [2021-12-21 13:52:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 13:52:44,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:44,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:44,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:52:44,831 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:44,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1777645674, now seen corresponding path program 1 times [2021-12-21 13:52:44,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:44,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798448529] [2021-12-21 13:52:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:44,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:44,901 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 13:52:44,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:44,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798448529] [2021-12-21 13:52:44,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798448529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:44,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:44,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:52:44,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325371915] [2021-12-21 13:52:44,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:44,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:52:44,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:44,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:52:44,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:52:44,904 INFO L87 Difference]: Start difference. First operand 2150 states and 3256 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 13:52:45,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:45,395 INFO L93 Difference]: Finished difference Result 4242 states and 6452 transitions. [2021-12-21 13:52:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:52:45,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-12-21 13:52:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:45,417 INFO L225 Difference]: With dead ends: 4242 [2021-12-21 13:52:45,417 INFO L226 Difference]: Without dead ends: 2150 [2021-12-21 13:52:45,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:52:45,421 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 603 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:45,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 156 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:45,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-12-21 13:52:45,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 2150. [2021-12-21 13:52:45,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.5006979990693345) internal successors, (3225), 2149 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states 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 13:52:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3225 transitions. [2021-12-21 13:52:45,781 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3225 transitions. Word has length 96 [2021-12-21 13:52:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:45,781 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3225 transitions. [2021-12-21 13:52:45,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 13:52:45,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3225 transitions. [2021-12-21 13:52:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 13:52:45,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:45,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:45,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:52:45,783 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:45,784 INFO L85 PathProgramCache]: Analyzing trace with hash -341822485, now seen corresponding path program 1 times [2021-12-21 13:52:45,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:45,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298372174] [2021-12-21 13:52:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:45,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:45,833 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 13:52:45,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:45,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298372174] [2021-12-21 13:52:45,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298372174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:45,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:45,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:52:45,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422488438] [2021-12-21 13:52:45,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:45,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:52:45,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:45,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:52:45,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:52:45,836 INFO L87 Difference]: Start difference. First operand 2150 states and 3225 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:52:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:46,221 INFO L93 Difference]: Finished difference Result 4246 states and 6395 transitions. [2021-12-21 13:52:46,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:52:46,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-21 13:52:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:46,225 INFO L225 Difference]: With dead ends: 4246 [2021-12-21 13:52:46,226 INFO L226 Difference]: Without dead ends: 2150 [2021-12-21 13:52:46,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:52:46,229 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 608 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:46,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 148 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-12-21 13:52:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 2150. [2021-12-21 13:52:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.4862726849697534) internal successors, (3194), 2149 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states 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 13:52:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3194 transitions. [2021-12-21 13:52:46,494 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3194 transitions. Word has length 97 [2021-12-21 13:52:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:46,494 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3194 transitions. [2021-12-21 13:52:46,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:52:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3194 transitions. [2021-12-21 13:52:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 13:52:46,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:46,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:52:46,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:52:46,496 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash 331898154, now seen corresponding path program 1 times [2021-12-21 13:52:46,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:46,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314818333] [2021-12-21 13:52:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:46,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:46,548 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 13:52:46,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:46,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314818333] [2021-12-21 13:52:46,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314818333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:46,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:46,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:52:46,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103195622] [2021-12-21 13:52:46,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:46,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:52:46,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:52:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:52:46,550 INFO L87 Difference]: Start difference. First operand 2150 states and 3194 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:46,904 INFO L93 Difference]: Finished difference Result 4234 states and 6321 transitions. [2021-12-21 13:52:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:52:46,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-21 13:52:46,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:46,907 INFO L225 Difference]: With dead ends: 4234 [2021-12-21 13:52:46,907 INFO L226 Difference]: Without dead ends: 2150 [2021-12-21 13:52:46,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:52:46,910 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 566 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:46,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 172 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:52:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-12-21 13:52:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 2150. [2021-12-21 13:52:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.4718473708701723) internal successors, (3163), 2149 states have internal predecessors, (3163), 0 states have call successors, (0), 0 states 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 13:52:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3163 transitions. [2021-12-21 13:52:47,182 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3163 transitions. Word has length 98 [2021-12-21 13:52:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:47,182 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3163 transitions. [2021-12-21 13:52:47,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3163 transitions. [2021-12-21 13:52:47,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 13:52:47,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:47,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:47,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:52:47,185 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash 19008367, now seen corresponding path program 1 times [2021-12-21 13:52:47,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:47,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799593744] [2021-12-21 13:52:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:47,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:47,444 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 13:52:47,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:47,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799593744] [2021-12-21 13:52:47,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799593744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:47,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:47,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 13:52:47,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001937461] [2021-12-21 13:52:47,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:47,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 13:52:47,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 13:52:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:52:47,447 INFO L87 Difference]: Start difference. First operand 2150 states and 3163 transitions. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:48,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:48,812 INFO L93 Difference]: Finished difference Result 6244 states and 9211 transitions. [2021-12-21 13:52:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 13:52:48,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-21 13:52:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:48,821 INFO L225 Difference]: With dead ends: 6244 [2021-12-21 13:52:48,821 INFO L226 Difference]: Without dead ends: 4237 [2021-12-21 13:52:48,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-21 13:52:48,825 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 1327 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:48,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 614 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 13:52:48,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-12-21 13:52:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 2150. [2021-12-21 13:52:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.4695207073057235) internal successors, (3158), 2149 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states 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 13:52:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3158 transitions. [2021-12-21 13:52:49,163 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3158 transitions. Word has length 99 [2021-12-21 13:52:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:49,163 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3158 transitions. [2021-12-21 13:52:49,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3158 transitions. [2021-12-21 13:52:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-21 13:52:49,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:49,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:49,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:52:49,166 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1836312485, now seen corresponding path program 1 times [2021-12-21 13:52:49,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:49,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031733974] [2021-12-21 13:52:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:49,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:49,325 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 13:52:49,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:49,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031733974] [2021-12-21 13:52:49,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031733974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:49,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:49,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:52:49,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435897950] [2021-12-21 13:52:49,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:49,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:52:49,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:49,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:52:49,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:52:49,328 INFO L87 Difference]: Start difference. First operand 2150 states and 3158 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 13:52:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:50,517 INFO L93 Difference]: Finished difference Result 6144 states and 9078 transitions. [2021-12-21 13:52:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:52:50,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-21 13:52:50,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:50,523 INFO L225 Difference]: With dead ends: 6144 [2021-12-21 13:52:50,523 INFO L226 Difference]: Without dead ends: 4102 [2021-12-21 13:52:50,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:52:50,526 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 1663 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1663 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:50,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1663 Valid, 392 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:52:50,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-12-21 13:52:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 2150. [2021-12-21 13:52:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.4690553745928339) internal successors, (3157), 2149 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states 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 13:52:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3157 transitions. [2021-12-21 13:52:50,941 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3157 transitions. Word has length 100 [2021-12-21 13:52:50,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:50,942 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3157 transitions. [2021-12-21 13:52:50,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 13:52:50,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3157 transitions. [2021-12-21 13:52:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-21 13:52:50,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:50,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:50,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 13:52:50,944 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:50,944 INFO L85 PathProgramCache]: Analyzing trace with hash -332342721, now seen corresponding path program 1 times [2021-12-21 13:52:50,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:50,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214205729] [2021-12-21 13:52:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:50,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:51,148 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 13:52:51,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:51,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214205729] [2021-12-21 13:52:51,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214205729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:51,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:51,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:52:51,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297674107] [2021-12-21 13:52:51,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:51,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:52:51,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:51,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:52:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:52:51,152 INFO L87 Difference]: Start difference. First operand 2150 states and 3157 transitions. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 13:52:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:52,539 INFO L93 Difference]: Finished difference Result 6289 states and 9269 transitions. [2021-12-21 13:52:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 13:52:52,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-21 13:52:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:52,547 INFO L225 Difference]: With dead ends: 6289 [2021-12-21 13:52:52,547 INFO L226 Difference]: Without dead ends: 4252 [2021-12-21 13:52:52,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-12-21 13:52:52,550 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 1232 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:52,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1232 Valid, 842 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:52:52,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-12-21 13:52:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 2150. [2021-12-21 13:52:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.4681247091670544) internal successors, (3155), 2149 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states 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 13:52:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3155 transitions. [2021-12-21 13:52:52,990 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3155 transitions. Word has length 100 [2021-12-21 13:52:52,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:52,990 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3155 transitions. [2021-12-21 13:52:52,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 13:52:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3155 transitions. [2021-12-21 13:52:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-21 13:52:52,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:52,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:52,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 13:52:52,992 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash -60484552, now seen corresponding path program 1 times [2021-12-21 13:52:52,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:52,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625027288] [2021-12-21 13:52:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:52,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:53,148 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 13:52:53,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:53,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625027288] [2021-12-21 13:52:53,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625027288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:53,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:53,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:52:53,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666414498] [2021-12-21 13:52:53,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:53,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:52:53,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:53,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:52:53,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:52:53,151 INFO L87 Difference]: Start difference. First operand 2150 states and 3155 transitions. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 9 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:54,642 INFO L93 Difference]: Finished difference Result 6274 states and 9243 transitions. [2021-12-21 13:52:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 13:52:54,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 9 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-21 13:52:54,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:54,649 INFO L225 Difference]: With dead ends: 6274 [2021-12-21 13:52:54,649 INFO L226 Difference]: Without dead ends: 4247 [2021-12-21 13:52:54,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-12-21 13:52:54,653 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 1501 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:54,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1501 Valid, 659 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:52:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-12-21 13:52:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 2150. [2021-12-21 13:52:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.4662633783154955) internal successors, (3151), 2149 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states 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 13:52:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3151 transitions. [2021-12-21 13:52:55,166 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3151 transitions. Word has length 101 [2021-12-21 13:52:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:55,166 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3151 transitions. [2021-12-21 13:52:55,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 9 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3151 transitions. [2021-12-21 13:52:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 13:52:55,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:55,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:55,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 13:52:55,168 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:55,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash -427226295, now seen corresponding path program 1 times [2021-12-21 13:52:55,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:55,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653580083] [2021-12-21 13:52:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:55,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:52:55,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:55,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653580083] [2021-12-21 13:52:55,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653580083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:55,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:55,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:52:55,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545315671] [2021-12-21 13:52:55,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:55,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:52:55,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:52:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:52:55,346 INFO L87 Difference]: Start difference. First operand 2150 states and 3151 transitions. Second operand has 10 states, 10 states have (on average 10.2) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:56,819 INFO L93 Difference]: Finished difference Result 6199 states and 9127 transitions. [2021-12-21 13:52:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 13:52:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.2) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-21 13:52:56,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:52:56,825 INFO L225 Difference]: With dead ends: 6199 [2021-12-21 13:52:56,825 INFO L226 Difference]: Without dead ends: 4217 [2021-12-21 13:52:56,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-12-21 13:52:56,828 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 1448 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:52:56,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 637 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:52:56,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4217 states. [2021-12-21 13:52:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4217 to 2150. [2021-12-21 13:52:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.4634713820381573) internal successors, (3145), 2149 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states 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 13:52:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3145 transitions. [2021-12-21 13:52:57,354 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3145 transitions. Word has length 102 [2021-12-21 13:52:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:52:57,354 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3145 transitions. [2021-12-21 13:52:57,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.2) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3145 transitions. [2021-12-21 13:52:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 13:52:57,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:52:57,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:52:57,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 13:52:57,356 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:52:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:52:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1548711228, now seen corresponding path program 1 times [2021-12-21 13:52:57,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:52:57,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801170358] [2021-12-21 13:52:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:52:57,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:52:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:52:57,615 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 13:52:57,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:52:57,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801170358] [2021-12-21 13:52:57,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801170358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:52:57,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:52:57,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 13:52:57,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666276036] [2021-12-21 13:52:57,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:52:57,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 13:52:57,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:52:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 13:52:57,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:52:57,618 INFO L87 Difference]: Start difference. First operand 2150 states and 3145 transitions. Second operand has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:53:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:53:09,137 INFO L93 Difference]: Finished difference Result 35963 states and 52585 transitions. [2021-12-21 13:53:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 13:53:09,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-21 13:53:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:53:09,189 INFO L225 Difference]: With dead ends: 35963 [2021-12-21 13:53:09,189 INFO L226 Difference]: Without dead ends: 34011 [2021-12-21 13:53:09,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2021-12-21 13:53:09,200 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 6343 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6343 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:53:09,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6343 Valid, 1571 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 13:53:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34011 states. [2021-12-21 13:53:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34011 to 2168. [2021-12-21 13:53:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 1.4591601292108907) internal successors, (3162), 2167 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states 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 13:53:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 3162 transitions. [2021-12-21 13:53:10,220 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 3162 transitions. Word has length 103 [2021-12-21 13:53:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:53:10,220 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 3162 transitions. [2021-12-21 13:53:10,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:53:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 3162 transitions. [2021-12-21 13:53:10,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 13:53:10,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:53:10,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:53:10,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 13:53:10,222 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:53:10,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:53:10,223 INFO L85 PathProgramCache]: Analyzing trace with hash 95562903, now seen corresponding path program 1 times [2021-12-21 13:53:10,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:53:10,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219005632] [2021-12-21 13:53:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:53:10,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:53:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:53:10,372 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 13:53:10,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:53:10,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219005632] [2021-12-21 13:53:10,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219005632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:53:10,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:53:10,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:53:10,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120781824] [2021-12-21 13:53:10,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:53:10,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:53:10,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:53:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:53:10,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:53:10,375 INFO L87 Difference]: Start difference. First operand 2168 states and 3162 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:53:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:53:12,279 INFO L93 Difference]: Finished difference Result 6146 states and 9028 transitions. [2021-12-21 13:53:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 13:53:12,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-21 13:53:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:53:12,285 INFO L225 Difference]: With dead ends: 6146 [2021-12-21 13:53:12,285 INFO L226 Difference]: Without dead ends: 4195 [2021-12-21 13:53:12,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-12-21 13:53:12,288 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 740 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:53:12,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 649 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:53:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-12-21 13:53:13,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 2150. [2021-12-21 13:53:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.4602140530479293) internal successors, (3138), 2149 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states 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 13:53:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 3138 transitions. [2021-12-21 13:53:13,045 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 3138 transitions. Word has length 104 [2021-12-21 13:53:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:53:13,045 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 3138 transitions. [2021-12-21 13:53:13,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:53:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 3138 transitions. [2021-12-21 13:53:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 13:53:13,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:53:13,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:53:13,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 13:53:13,047 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:53:13,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:53:13,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1323186080, now seen corresponding path program 1 times [2021-12-21 13:53:13,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:53:13,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944828529] [2021-12-21 13:53:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:53:13,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:53:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:53:13,419 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 13:53:13,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:53:13,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944828529] [2021-12-21 13:53:13,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944828529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:53:13,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:53:13,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 13:53:13,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137200522] [2021-12-21 13:53:13,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:53:13,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 13:53:13,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:53:13,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 13:53:13,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:53:13,421 INFO L87 Difference]: Start difference. First operand 2150 states and 3138 transitions. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:53:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:53:19,484 INFO L93 Difference]: Finished difference Result 12640 states and 18659 transitions. [2021-12-21 13:53:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 13:53:19,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-21 13:53:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:53:19,497 INFO L225 Difference]: With dead ends: 12640 [2021-12-21 13:53:19,497 INFO L226 Difference]: Without dead ends: 12078 [2021-12-21 13:53:19,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-12-21 13:53:19,501 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 1555 mSDsluCounter, 4094 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 4656 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 13:53:19,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1555 Valid, 4656 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 13:53:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12078 states. [2021-12-21 13:53:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12078 to 2124. [2021-12-21 13:53:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.460197833254828) internal successors, (3100), 2123 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states 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 13:53:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3100 transitions. [2021-12-21 13:53:20,478 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3100 transitions. Word has length 104 [2021-12-21 13:53:20,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:53:20,478 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 3100 transitions. [2021-12-21 13:53:20,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:53:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3100 transitions. [2021-12-21 13:53:20,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 13:53:20,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:53:20,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:53:20,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 13:53:20,480 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:53:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:53:20,481 INFO L85 PathProgramCache]: Analyzing trace with hash -977108255, now seen corresponding path program 1 times [2021-12-21 13:53:20,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:53:20,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321365530] [2021-12-21 13:53:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:53:20,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:53:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:53:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:53:21,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:53:21,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321365530] [2021-12-21 13:53:21,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321365530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:53:21,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:53:21,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-12-21 13:53:21,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315706102] [2021-12-21 13:53:21,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:53:21,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-21 13:53:21,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:53:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-21 13:53:21,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 13:53:21,896 INFO L87 Difference]: Start difference. First operand 2124 states and 3100 transitions. Second operand has 38 states, 38 states have (on average 2.736842105263158) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)