./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label46.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/eca-rers2012/Problem03_label46.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 541e7f2d0384c0fe15c71d37dc3b6d915f82dde67f224d182d5f6431c66d5181 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:28:49,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:28:49,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:28:49,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:28:49,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:28:49,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:28:49,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:28:49,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:28:49,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:28:49,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:28:49,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:28:49,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:28:49,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:28:49,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:28:49,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:28:49,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:28:49,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:28:49,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:28:49,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:28:49,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:28:49,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:28:49,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:28:49,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:28:49,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:28:49,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:28:49,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:28:49,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:28:49,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:28:49,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:28:49,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:28:49,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:28:49,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:28:49,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:28:49,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:28:49,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:28:49,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:28:49,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:28:49,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:28:49,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:28:49,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:28:49,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:28:49,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:28:49,564 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:28:49,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:28:49,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:28:49,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:28:49,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:28:49,566 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:28:49,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:28:49,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:28:49,567 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:28:49,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:28:49,568 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:28:49,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:28:49,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:28:49,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:28:49,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:28:49,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:28:49,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:28:49,569 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:28:49,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:28:49,570 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:28:49,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:28:49,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:28:49,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:28:49,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:28:49,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:28:49,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:28:49,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:28:49,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:28:49,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:28:49,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:28:49,573 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:28:49,573 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:28:49,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:28:49,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:28:49,574 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 541e7f2d0384c0fe15c71d37dc3b6d915f82dde67f224d182d5f6431c66d5181 [2021-12-21 10:28:49,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:28:49,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:28:49,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:28:49,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:28:49,806 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:28:49,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label46.c [2021-12-21 10:28:49,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe1a39eb/9a9d3adac4a942a087532d4e75d04579/FLAGc0b551c1a [2021-12-21 10:28:50,418 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:28:50,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label46.c [2021-12-21 10:28:50,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe1a39eb/9a9d3adac4a942a087532d4e75d04579/FLAGc0b551c1a [2021-12-21 10:28:50,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe1a39eb/9a9d3adac4a942a087532d4e75d04579 [2021-12-21 10:28:50,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:28:50,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:28:50,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:28:50,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:28:50,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:28:50,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:50" (1/1) ... [2021-12-21 10:28:50,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18608af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50, skipping insertion in model container [2021-12-21 10:28:50,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:50" (1/1) ... [2021-12-21 10:28:50,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:28:50,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:28:51,447 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/eca-rers2012/Problem03_label46.c[59207,59220] [2021-12-21 10:28:51,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:28:51,499 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:28:51,767 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/eca-rers2012/Problem03_label46.c[59207,59220] [2021-12-21 10:28:51,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:28:51,795 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:28:51,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51 WrapperNode [2021-12-21 10:28:51,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:28:51,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:28:51,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:28:51,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:28:51,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51" (1/1) ... [2021-12-21 10:28:51,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51" (1/1) ... [2021-12-21 10:28:51,921 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-21 10:28:51,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:28:51,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:28:51,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:28:51,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:28:51,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51" (1/1) ... [2021-12-21 10:28:51,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51" (1/1) ... [2021-12-21 10:28:51,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51" (1/1) ... [2021-12-21 10:28:51,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51" (1/1) ... [2021-12-21 10:28:52,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51" (1/1) ... [2021-12-21 10:28:52,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51" (1/1) ... [2021-12-21 10:28:52,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51" (1/1) ... [2021-12-21 10:28:52,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:28:52,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:28:52,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:28:52,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:28:52,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51" (1/1) ... [2021-12-21 10:28:52,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:28:52,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:28:52,093 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 10:28:52,101 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 10:28:52,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:28:52,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:28:52,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:28:52,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:28:52,243 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:28:52,255 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:28:53,556 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:28:53,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:28:53,567 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:28:53,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:53 BoogieIcfgContainer [2021-12-21 10:28:53,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:28:53,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:28:53,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:28:53,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:28:53,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:28:50" (1/3) ... [2021-12-21 10:28:53,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a93162b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:53, skipping insertion in model container [2021-12-21 10:28:53,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:51" (2/3) ... [2021-12-21 10:28:53,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a93162b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:53, skipping insertion in model container [2021-12-21 10:28:53,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:53" (3/3) ... [2021-12-21 10:28:53,577 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label46.c [2021-12-21 10:28:53,582 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:28:53,582 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:28:53,624 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:28:53,631 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 10:28:53,631 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:28:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 10:28:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-21 10:28:53,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:28:53,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:53,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:28:53,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:28:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1730728613, now seen corresponding path program 1 times [2021-12-21 10:28:53,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:28:53,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896715393] [2021-12-21 10:28:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:28:53,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:28:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:28:54,167 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 10:28:54,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:28:54,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896715393] [2021-12-21 10:28:54,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896715393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:28:54,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:28:54,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:28:54,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520044607] [2021-12-21 10:28:54,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:28:54,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:28:54,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:28:54,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:28:54,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:28:54,203 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 10:28:55,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:28:55,165 INFO L93 Difference]: Finished difference Result 835 states and 1478 transitions. [2021-12-21 10:28:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:28:55,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2021-12-21 10:28:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:28:55,188 INFO L225 Difference]: With dead ends: 835 [2021-12-21 10:28:55,188 INFO L226 Difference]: Without dead ends: 456 [2021-12-21 10:28:55,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:28:55,199 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 103 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:28:55,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 161 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:28:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-21 10:28:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 451. [2021-12-21 10:28:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5622222222222222) internal successors, (703), 450 states have internal predecessors, (703), 0 states have call successors, (0), 0 states 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 10:28:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 703 transitions. [2021-12-21 10:28:55,259 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 703 transitions. Word has length 185 [2021-12-21 10:28:55,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:28:55,260 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 703 transitions. [2021-12-21 10:28:55,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 10:28:55,260 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 703 transitions. [2021-12-21 10:28:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-21 10:28:55,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:28:55,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:55,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:28:55,264 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:28:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:28:55,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1408358515, now seen corresponding path program 1 times [2021-12-21 10:28:55,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:28:55,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441662505] [2021-12-21 10:28:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:28:55,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:28:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:28:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:28:55,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:28:55,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441662505] [2021-12-21 10:28:55,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441662505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:28:55,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:28:55,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:28:55,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962106773] [2021-12-21 10:28:55,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:28:55,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:28:55,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:28:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:28:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:28:55,440 INFO L87 Difference]: Start difference. First operand 451 states and 703 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 10:28:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:28:56,161 INFO L93 Difference]: Finished difference Result 1340 states and 2094 transitions. [2021-12-21 10:28:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:28:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 191 [2021-12-21 10:28:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:28:56,166 INFO L225 Difference]: With dead ends: 1340 [2021-12-21 10:28:56,166 INFO L226 Difference]: Without dead ends: 891 [2021-12-21 10:28:56,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:28:56,168 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:28:56,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 154 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:28:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-12-21 10:28:56,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2021-12-21 10:28:56,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 1.5474040632054176) internal successors, (1371), 886 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states 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 10:28:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1371 transitions. [2021-12-21 10:28:56,202 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1371 transitions. Word has length 191 [2021-12-21 10:28:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:28:56,202 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1371 transitions. [2021-12-21 10:28:56,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 10:28:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1371 transitions. [2021-12-21 10:28:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-21 10:28:56,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:28:56,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:56,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:28:56,207 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:28:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:28:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash 567972033, now seen corresponding path program 1 times [2021-12-21 10:28:56,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:28:56,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445567690] [2021-12-21 10:28:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:28:56,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:28:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:28:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:28:56,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:28:56,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445567690] [2021-12-21 10:28:56,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445567690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:28:56,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:28:56,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:28:56,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189893031] [2021-12-21 10:28:56,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:28:56,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:28:56,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:28:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:28:56,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:28:56,311 INFO L87 Difference]: Start difference. First operand 887 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 10:28:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:28:57,040 INFO L93 Difference]: Finished difference Result 2612 states and 4042 transitions. [2021-12-21 10:28:57,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:28:57,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 195 [2021-12-21 10:28:57,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:28:57,050 INFO L225 Difference]: With dead ends: 2612 [2021-12-21 10:28:57,050 INFO L226 Difference]: Without dead ends: 1727 [2021-12-21 10:28:57,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:28:57,058 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:28:57,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 114 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:28:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-12-21 10:28:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2021-12-21 10:28:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.4715777262180973) internal successors, (2537), 1724 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states 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 10:28:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2537 transitions. [2021-12-21 10:28:57,120 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2537 transitions. Word has length 195 [2021-12-21 10:28:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:28:57,122 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 2537 transitions. [2021-12-21 10:28:57,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 10:28:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2537 transitions. [2021-12-21 10:28:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-21 10:28:57,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:28:57,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:57,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:28:57,130 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:28:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:28:57,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1214228354, now seen corresponding path program 1 times [2021-12-21 10:28:57,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:28:57,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492880624] [2021-12-21 10:28:57,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:28:57,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:28:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:28:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:28:57,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:28:57,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492880624] [2021-12-21 10:28:57,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492880624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:28:57,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:28:57,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:28:57,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166843900] [2021-12-21 10:28:57,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:28:57,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:28:57,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:28:57,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:28:57,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:28:57,198 INFO L87 Difference]: Start difference. First operand 1725 states and 2537 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 10:28:57,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:28:57,888 INFO L93 Difference]: Finished difference Result 5091 states and 7490 transitions. [2021-12-21 10:28:57,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:28:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 198 [2021-12-21 10:28:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:28:57,902 INFO L225 Difference]: With dead ends: 5091 [2021-12-21 10:28:57,902 INFO L226 Difference]: Without dead ends: 3368 [2021-12-21 10:28:57,906 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 10:28:57,907 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 250 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:28:57,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 157 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:28:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-12-21 10:28:57,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 3366. [2021-12-21 10:28:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 1.4050520059435363) internal successors, (4728), 3365 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states 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 10:28:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4728 transitions. [2021-12-21 10:28:57,990 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4728 transitions. Word has length 198 [2021-12-21 10:28:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:28:57,991 INFO L470 AbstractCegarLoop]: Abstraction has 3366 states and 4728 transitions. [2021-12-21 10:28:57,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 10:28:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4728 transitions. [2021-12-21 10:28:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-21 10:28:57,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:28:57,999 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:57,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:28:58,000 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:28:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:28:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash 497552120, now seen corresponding path program 1 times [2021-12-21 10:28:58,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:28:58,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367833359] [2021-12-21 10:28:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:28:58,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:28:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:28:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 10:28:58,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:28:58,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367833359] [2021-12-21 10:28:58,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367833359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:28:58,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:28:58,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:28:58,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551952155] [2021-12-21 10:28:58,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:28:58,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:28:58,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:28:58,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:28:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:28:58,109 INFO L87 Difference]: Start difference. First operand 3366 states and 4728 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 10:28:58,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:28:58,855 INFO L93 Difference]: Finished difference Result 9999 states and 14055 transitions. [2021-12-21 10:28:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:28:58,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 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 218 [2021-12-21 10:28:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:28:58,880 INFO L225 Difference]: With dead ends: 9999 [2021-12-21 10:28:58,881 INFO L226 Difference]: Without dead ends: 6635 [2021-12-21 10:28:58,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:28:58,895 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 235 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:28:58,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 133 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:28:58,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-12-21 10:28:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 6626. [2021-12-21 10:28:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6626 states, 6625 states have (on average 1.3542641509433961) internal successors, (8972), 6625 states have internal predecessors, (8972), 0 states have call successors, (0), 0 states 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 10:28:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 8972 transitions. [2021-12-21 10:28:59,074 INFO L78 Accepts]: Start accepts. Automaton has 6626 states and 8972 transitions. Word has length 218 [2021-12-21 10:28:59,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:28:59,074 INFO L470 AbstractCegarLoop]: Abstraction has 6626 states and 8972 transitions. [2021-12-21 10:28:59,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 10:28:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 6626 states and 8972 transitions. [2021-12-21 10:28:59,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-21 10:28:59,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:28:59,087 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:59,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:28:59,087 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:28:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:28:59,088 INFO L85 PathProgramCache]: Analyzing trace with hash 404178270, now seen corresponding path program 1 times [2021-12-21 10:28:59,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:28:59,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532380832] [2021-12-21 10:28:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:28:59,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:28:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:28:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 10:28:59,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:28:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532380832] [2021-12-21 10:28:59,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532380832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:28:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858040856] [2021-12-21 10:28:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:28:59,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:28:59,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:28:59,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:28:59,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:28:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:28:59,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:28:59,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:28:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 10:28:59,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:28:59,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858040856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:28:59,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:28:59,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-21 10:28:59,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776884366] [2021-12-21 10:28:59,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:28:59,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:28:59,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:28:59,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:28:59,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:28:59,844 INFO L87 Difference]: Start difference. First operand 6626 states and 8972 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 10:29:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:00,168 INFO L93 Difference]: Finished difference Result 19869 states and 26907 transitions. [2021-12-21 10:29:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:00,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 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 223 [2021-12-21 10:29:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:00,219 INFO L225 Difference]: With dead ends: 19869 [2021-12-21 10:29:00,219 INFO L226 Difference]: Without dead ends: 13245 [2021-12-21 10:29:00,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:00,233 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 356 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:00,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 617 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:29:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13245 states. [2021-12-21 10:29:00,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13245 to 11594. [2021-12-21 10:29:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11594 states, 11593 states have (on average 1.3599585957043043) internal successors, (15766), 11593 states have internal predecessors, (15766), 0 states have call successors, (0), 0 states 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 10:29:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11594 states to 11594 states and 15766 transitions. [2021-12-21 10:29:00,503 INFO L78 Accepts]: Start accepts. Automaton has 11594 states and 15766 transitions. Word has length 223 [2021-12-21 10:29:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:00,504 INFO L470 AbstractCegarLoop]: Abstraction has 11594 states and 15766 transitions. [2021-12-21 10:29:00,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 10:29:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 11594 states and 15766 transitions. [2021-12-21 10:29:00,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-21 10:29:00,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:00,523 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:00,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:29:00,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-21 10:29:00,741 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:00,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:00,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1883887689, now seen corresponding path program 1 times [2021-12-21 10:29:00,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:00,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379057737] [2021-12-21 10:29:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:00,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:29:00,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:00,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379057737] [2021-12-21 10:29:00,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379057737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:29:00,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402311948] [2021-12-21 10:29:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:00,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:29:00,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:29:00,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:29:00,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:29:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:00,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:29:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:29:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 10:29:01,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:29:01,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402311948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:01,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:29:01,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:29:01,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865405320] [2021-12-21 10:29:01,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:01,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:01,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:01,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:01,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:01,380 INFO L87 Difference]: Start difference. First operand 11594 states and 15766 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 10:29:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:02,258 INFO L93 Difference]: Finished difference Result 32938 states and 44853 transitions. [2021-12-21 10:29:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:02,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 229 [2021-12-21 10:29:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:02,302 INFO L225 Difference]: With dead ends: 32938 [2021-12-21 10:29:02,303 INFO L226 Difference]: Without dead ends: 21346 [2021-12-21 10:29:02,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:02,321 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 55 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:02,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 418 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:29:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21346 states. [2021-12-21 10:29:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21346 to 20729. [2021-12-21 10:29:02,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20729 states, 20728 states have (on average 1.235478579698958) internal successors, (25609), 20728 states have internal predecessors, (25609), 0 states have call successors, (0), 0 states 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 10:29:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20729 states to 20729 states and 25609 transitions. [2021-12-21 10:29:02,778 INFO L78 Accepts]: Start accepts. Automaton has 20729 states and 25609 transitions. Word has length 229 [2021-12-21 10:29:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:02,780 INFO L470 AbstractCegarLoop]: Abstraction has 20729 states and 25609 transitions. [2021-12-21 10:29:02,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 10:29:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 20729 states and 25609 transitions. [2021-12-21 10:29:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-21 10:29:02,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:02,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:02,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:29:03,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-21 10:29:03,036 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1246639075, now seen corresponding path program 1 times [2021-12-21 10:29:03,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:03,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025086985] [2021-12-21 10:29:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:03,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:29:03,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:03,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025086985] [2021-12-21 10:29:03,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025086985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:03,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:29:03,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:29:03,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747454595] [2021-12-21 10:29:03,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:03,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:03,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:03,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:03,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:29:03,152 INFO L87 Difference]: Start difference. First operand 20729 states and 25609 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 10:29:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:03,596 INFO L93 Difference]: Finished difference Result 40743 states and 50304 transitions. [2021-12-21 10:29:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:03,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 246 [2021-12-21 10:29:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:03,725 INFO L225 Difference]: With dead ends: 40743 [2021-12-21 10:29:03,726 INFO L226 Difference]: Without dead ends: 20016 [2021-12-21 10:29:03,746 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 10:29:03,749 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:03,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:29:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20016 states. [2021-12-21 10:29:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20016 to 19610. [2021-12-21 10:29:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19610 states, 19609 states have (on average 1.216125248610332) internal successors, (23847), 19609 states have internal predecessors, (23847), 0 states have call successors, (0), 0 states 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 10:29:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19610 states to 19610 states and 23847 transitions. [2021-12-21 10:29:04,058 INFO L78 Accepts]: Start accepts. Automaton has 19610 states and 23847 transitions. Word has length 246 [2021-12-21 10:29:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:04,058 INFO L470 AbstractCegarLoop]: Abstraction has 19610 states and 23847 transitions. [2021-12-21 10:29:04,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 10:29:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 19610 states and 23847 transitions. [2021-12-21 10:29:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-21 10:29:04,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:04,156 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:04,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 10:29:04,157 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:04,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:04,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1351586102, now seen corresponding path program 1 times [2021-12-21 10:29:04,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:04,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766398244] [2021-12-21 10:29:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:04,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-21 10:29:04,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:04,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766398244] [2021-12-21 10:29:04,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766398244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:04,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:29:04,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:29:04,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872946636] [2021-12-21 10:29:04,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:04,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:04,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:04,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:04,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:29:04,241 INFO L87 Difference]: Start difference. First operand 19610 states and 23847 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:29:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:05,103 INFO L93 Difference]: Finished difference Result 44318 states and 53812 transitions. [2021-12-21 10:29:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:05,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-12-21 10:29:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:05,140 INFO L225 Difference]: With dead ends: 44318 [2021-12-21 10:29:05,140 INFO L226 Difference]: Without dead ends: 24710 [2021-12-21 10:29:05,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:29:05,160 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 224 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:05,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 118 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:29:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24710 states. [2021-12-21 10:29:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24710 to 24703. [2021-12-21 10:29:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24703 states, 24702 states have (on average 1.2094972067039107) internal successors, (29877), 24702 states have internal predecessors, (29877), 0 states have call successors, (0), 0 states 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 10:29:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24703 states to 24703 states and 29877 transitions. [2021-12-21 10:29:05,560 INFO L78 Accepts]: Start accepts. Automaton has 24703 states and 29877 transitions. Word has length 263 [2021-12-21 10:29:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:05,561 INFO L470 AbstractCegarLoop]: Abstraction has 24703 states and 29877 transitions. [2021-12-21 10:29:05,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:29:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 24703 states and 29877 transitions. [2021-12-21 10:29:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-21 10:29:05,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:05,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:05,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:29:05,599 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:05,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:05,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2060308471, now seen corresponding path program 1 times [2021-12-21 10:29:05,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:05,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268506622] [2021-12-21 10:29:05,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:05,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:29:05,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:05,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268506622] [2021-12-21 10:29:05,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268506622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:05,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:29:05,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:29:05,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764494779] [2021-12-21 10:29:05,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:05,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:05,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:29:05,749 INFO L87 Difference]: Start difference. First operand 24703 states and 29877 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states 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 10:29:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:06,560 INFO L93 Difference]: Finished difference Result 56304 states and 69149 transitions. [2021-12-21 10:29:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:06,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 275 [2021-12-21 10:29:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:06,740 INFO L225 Difference]: With dead ends: 56304 [2021-12-21 10:29:06,741 INFO L226 Difference]: Without dead ends: 31603 [2021-12-21 10:29:06,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:29:06,753 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 127 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:06,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 148 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:29:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31603 states. [2021-12-21 10:29:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31603 to 30182. [2021-12-21 10:29:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30182 states, 30181 states have (on average 1.1791193134753652) internal successors, (35587), 30181 states have internal predecessors, (35587), 0 states have call successors, (0), 0 states 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 10:29:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30182 states to 30182 states and 35587 transitions. [2021-12-21 10:29:07,267 INFO L78 Accepts]: Start accepts. Automaton has 30182 states and 35587 transitions. Word has length 275 [2021-12-21 10:29:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:07,268 INFO L470 AbstractCegarLoop]: Abstraction has 30182 states and 35587 transitions. [2021-12-21 10:29:07,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states 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 10:29:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 30182 states and 35587 transitions. [2021-12-21 10:29:07,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-12-21 10:29:07,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:07,300 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:07,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 10:29:07,300 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:07,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:07,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1907909627, now seen corresponding path program 1 times [2021-12-21 10:29:07,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:07,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381768871] [2021-12-21 10:29:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:07,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-21 10:29:07,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:07,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381768871] [2021-12-21 10:29:07,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381768871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:07,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:29:07,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:29:07,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301225174] [2021-12-21 10:29:07,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:07,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:07,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:07,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:07,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:29:07,444 INFO L87 Difference]: Start difference. First operand 30182 states and 35587 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:29:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:08,255 INFO L93 Difference]: Finished difference Result 69138 states and 82164 transitions. [2021-12-21 10:29:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:08,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 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 317 [2021-12-21 10:29:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:08,315 INFO L225 Difference]: With dead ends: 69138 [2021-12-21 10:29:08,316 INFO L226 Difference]: Without dead ends: 43237 [2021-12-21 10:29:08,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:29:08,448 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 160 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:08,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 153 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:29:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43237 states. [2021-12-21 10:29:09,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43237 to 39337. [2021-12-21 10:29:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39337 states, 39336 states have (on average 1.1970205409802726) internal successors, (47086), 39336 states have internal predecessors, (47086), 0 states have call successors, (0), 0 states 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 10:29:09,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39337 states to 39337 states and 47086 transitions. [2021-12-21 10:29:09,115 INFO L78 Accepts]: Start accepts. Automaton has 39337 states and 47086 transitions. Word has length 317 [2021-12-21 10:29:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:09,115 INFO L470 AbstractCegarLoop]: Abstraction has 39337 states and 47086 transitions. [2021-12-21 10:29:09,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:29:09,116 INFO L276 IsEmpty]: Start isEmpty. Operand 39337 states and 47086 transitions. [2021-12-21 10:29:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-21 10:29:09,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:09,160 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:29:09,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 10:29:09,161 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:09,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1371667299, now seen corresponding path program 1 times [2021-12-21 10:29:09,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:09,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811823265] [2021-12-21 10:29:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:09,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:29:09,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:09,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811823265] [2021-12-21 10:29:09,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811823265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:09,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:29:09,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:29:09,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387341205] [2021-12-21 10:29:09,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:09,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:09,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:09,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:09,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:29:09,326 INFO L87 Difference]: Start difference. First operand 39337 states and 47086 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 10:29:10,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:10,427 INFO L93 Difference]: Finished difference Result 91288 states and 108908 transitions. [2021-12-21 10:29:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:10,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 321 [2021-12-21 10:29:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:10,504 INFO L225 Difference]: With dead ends: 91288 [2021-12-21 10:29:10,505 INFO L226 Difference]: Without dead ends: 52564 [2021-12-21 10:29:10,533 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 10:29:10,534 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 208 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:10,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 378 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:29:10,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52564 states. [2021-12-21 10:29:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52564 to 52554. [2021-12-21 10:29:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52554 states, 52553 states have (on average 1.1587159629326584) internal successors, (60894), 52553 states have internal predecessors, (60894), 0 states have call successors, (0), 0 states 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 10:29:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52554 states to 52554 states and 60894 transitions. [2021-12-21 10:29:11,410 INFO L78 Accepts]: Start accepts. Automaton has 52554 states and 60894 transitions. Word has length 321 [2021-12-21 10:29:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:11,410 INFO L470 AbstractCegarLoop]: Abstraction has 52554 states and 60894 transitions. [2021-12-21 10:29:11,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 10:29:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 52554 states and 60894 transitions. [2021-12-21 10:29:11,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-12-21 10:29:11,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:11,477 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:29:11,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 10:29:11,478 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:11,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2120284311, now seen corresponding path program 1 times [2021-12-21 10:29:11,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:11,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613047372] [2021-12-21 10:29:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:11,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 154 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:29:11,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:11,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613047372] [2021-12-21 10:29:11,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613047372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:29:11,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876271087] [2021-12-21 10:29:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:11,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:29:11,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:29:11,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:29:11,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:29:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:11,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:29:11,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:29:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 10:29:12,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:29:12,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876271087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:12,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:29:12,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 10:29:12,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22963788] [2021-12-21 10:29:12,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:12,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:12,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:12,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:12,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:29:12,313 INFO L87 Difference]: Start difference. First operand 52554 states and 60894 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 10:29:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:13,248 INFO L93 Difference]: Finished difference Result 104299 states and 120883 transitions. [2021-12-21 10:29:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:13,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 338 [2021-12-21 10:29:13,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:13,321 INFO L225 Difference]: With dead ends: 104299 [2021-12-21 10:29:13,321 INFO L226 Difference]: Without dead ends: 51950 [2021-12-21 10:29:13,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:29:13,368 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 77 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:13,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 290 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:29:13,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51950 states. [2021-12-21 10:29:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51950 to 50723. [2021-12-21 10:29:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50723 states, 50722 states have (on average 1.142561413193486) internal successors, (57953), 50722 states have internal predecessors, (57953), 0 states have call successors, (0), 0 states 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 10:29:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50723 states to 50723 states and 57953 transitions. [2021-12-21 10:29:14,209 INFO L78 Accepts]: Start accepts. Automaton has 50723 states and 57953 transitions. Word has length 338 [2021-12-21 10:29:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:14,210 INFO L470 AbstractCegarLoop]: Abstraction has 50723 states and 57953 transitions. [2021-12-21 10:29:14,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 10:29:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 50723 states and 57953 transitions. [2021-12-21 10:29:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-21 10:29:14,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:14,249 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:14,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:29:14,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:29:14,459 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:14,459 INFO L85 PathProgramCache]: Analyzing trace with hash -814585628, now seen corresponding path program 1 times [2021-12-21 10:29:14,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:14,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796738399] [2021-12-21 10:29:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:14,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-21 10:29:14,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:14,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796738399] [2021-12-21 10:29:14,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796738399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:14,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:29:14,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:29:14,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68820672] [2021-12-21 10:29:14,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:14,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:29:14,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:29:14,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:29:14,599 INFO L87 Difference]: Start difference. First operand 50723 states and 57953 transitions. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 10:29:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:16,024 INFO L93 Difference]: Finished difference Result 126665 states and 144997 transitions. [2021-12-21 10:29:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:29:16,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 344 [2021-12-21 10:29:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:16,121 INFO L225 Difference]: With dead ends: 126665 [2021-12-21 10:29:16,121 INFO L226 Difference]: Without dead ends: 78186 [2021-12-21 10:29:16,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:29:16,156 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 365 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:16,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 81 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:29:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78186 states. [2021-12-21 10:29:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78186 to 70842. [2021-12-21 10:29:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70842 states, 70841 states have (on average 1.1387896839400913) internal successors, (80673), 70841 states have internal predecessors, (80673), 0 states have call successors, (0), 0 states 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 10:29:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70842 states to 70842 states and 80673 transitions. [2021-12-21 10:29:17,330 INFO L78 Accepts]: Start accepts. Automaton has 70842 states and 80673 transitions. Word has length 344 [2021-12-21 10:29:17,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:17,331 INFO L470 AbstractCegarLoop]: Abstraction has 70842 states and 80673 transitions. [2021-12-21 10:29:17,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 10:29:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 70842 states and 80673 transitions. [2021-12-21 10:29:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-21 10:29:17,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:17,399 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:29:17,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 10:29:17,399 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1104087719, now seen corresponding path program 1 times [2021-12-21 10:29:17,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:17,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073128047] [2021-12-21 10:29:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:17,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 252 proven. 6 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-21 10:29:17,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:17,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073128047] [2021-12-21 10:29:17,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073128047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:29:17,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454589167] [2021-12-21 10:29:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:17,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:29:17,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:29:17,592 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:29:17,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:29:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:18,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:29:18,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:29:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-21 10:29:18,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:29:18,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454589167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:18,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:29:18,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-21 10:29:18,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737774150] [2021-12-21 10:29:18,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:18,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:18,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:18,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:18,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:18,781 INFO L87 Difference]: Start difference. First operand 70842 states and 80673 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 10:29:19,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:19,926 INFO L93 Difference]: Finished difference Result 161673 states and 185223 transitions. [2021-12-21 10:29:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:19,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 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 434 [2021-12-21 10:29:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:20,037 INFO L225 Difference]: With dead ends: 161673 [2021-12-21 10:29:20,037 INFO L226 Difference]: Without dead ends: 91444 [2021-12-21 10:29:20,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:20,079 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 132 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:20,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 99 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:29:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91444 states. [2021-12-21 10:29:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91444 to 88987. [2021-12-21 10:29:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88987 states, 88986 states have (on average 1.1335266221652844) internal successors, (100868), 88986 states have internal predecessors, (100868), 0 states have call successors, (0), 0 states 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 10:29:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88987 states to 88987 states and 100868 transitions. [2021-12-21 10:29:21,575 INFO L78 Accepts]: Start accepts. Automaton has 88987 states and 100868 transitions. Word has length 434 [2021-12-21 10:29:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:21,575 INFO L470 AbstractCegarLoop]: Abstraction has 88987 states and 100868 transitions. [2021-12-21 10:29:21,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 10:29:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 88987 states and 100868 transitions. [2021-12-21 10:29:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-12-21 10:29:21,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:21,657 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:29:21,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:29:21,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 10:29:21,859 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:21,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1852664660, now seen corresponding path program 1 times [2021-12-21 10:29:21,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:21,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235453066] [2021-12-21 10:29:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:21,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 136 proven. 6 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-12-21 10:29:22,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:22,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235453066] [2021-12-21 10:29:22,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235453066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:29:22,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758196350] [2021-12-21 10:29:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:22,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:29:22,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:29:22,033 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:29:22,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:29:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:22,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:29:22,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:29:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-21 10:29:23,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:29:23,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758196350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:23,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:29:23,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-21 10:29:23,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336686432] [2021-12-21 10:29:23,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:23,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:23,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:23,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:23,173 INFO L87 Difference]: Start difference. First operand 88987 states and 100868 transitions. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 10:29:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:24,278 INFO L93 Difference]: Finished difference Result 253300 states and 287127 transitions. [2021-12-21 10:29:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:24,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 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 503 [2021-12-21 10:29:24,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:24,515 INFO L225 Difference]: With dead ends: 253300 [2021-12-21 10:29:24,515 INFO L226 Difference]: Without dead ends: 164721 [2021-12-21 10:29:24,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:24,541 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 209 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:24,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 525 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:29:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164721 states. [2021-12-21 10:29:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164721 to 156989. [2021-12-21 10:29:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156989 states, 156988 states have (on average 1.1355135424363645) internal successors, (178262), 156988 states have internal predecessors, (178262), 0 states have call successors, (0), 0 states 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 10:29:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156989 states to 156989 states and 178262 transitions. [2021-12-21 10:29:27,307 INFO L78 Accepts]: Start accepts. Automaton has 156989 states and 178262 transitions. Word has length 503 [2021-12-21 10:29:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:27,308 INFO L470 AbstractCegarLoop]: Abstraction has 156989 states and 178262 transitions. [2021-12-21 10:29:27,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 10:29:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 156989 states and 178262 transitions. [2021-12-21 10:29:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-12-21 10:29:27,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:27,439 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:29:27,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:29:27,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 10:29:27,640 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:27,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1280866654, now seen corresponding path program 1 times [2021-12-21 10:29:27,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:27,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255224738] [2021-12-21 10:29:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:27,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 202 proven. 6 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2021-12-21 10:29:27,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:27,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255224738] [2021-12-21 10:29:27,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255224738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:29:27,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420353922] [2021-12-21 10:29:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:27,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:29:27,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:29:27,775 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:29:27,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:29:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:27,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:29:27,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:29:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-12-21 10:29:28,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:29:28,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420353922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:28,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:29:28,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:29:28,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924695103] [2021-12-21 10:29:28,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:28,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:28,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:28,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:28,634 INFO L87 Difference]: Start difference. First operand 156989 states and 178262 transitions. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 10:29:30,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:30,408 INFO L93 Difference]: Finished difference Result 355328 states and 404703 transitions. [2021-12-21 10:29:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:30,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 515 [2021-12-21 10:29:30,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:31,073 INFO L225 Difference]: With dead ends: 355328 [2021-12-21 10:29:31,074 INFO L226 Difference]: Without dead ends: 202405 [2021-12-21 10:29:31,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:31,129 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:31,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 159 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:29:31,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202405 states. [2021-12-21 10:29:33,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202405 to 164301. [2021-12-21 10:29:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164301 states, 164300 states have (on average 1.1346013390139988) internal successors, (186415), 164300 states have internal predecessors, (186415), 0 states have call successors, (0), 0 states 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 10:29:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164301 states to 164301 states and 186415 transitions. [2021-12-21 10:29:33,777 INFO L78 Accepts]: Start accepts. Automaton has 164301 states and 186415 transitions. Word has length 515 [2021-12-21 10:29:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:33,777 INFO L470 AbstractCegarLoop]: Abstraction has 164301 states and 186415 transitions. [2021-12-21 10:29:33,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 10:29:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 164301 states and 186415 transitions. [2021-12-21 10:29:34,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-12-21 10:29:34,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:34,417 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:29:34,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-21 10:29:34,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 10:29:34,632 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:34,632 INFO L85 PathProgramCache]: Analyzing trace with hash -604117790, now seen corresponding path program 1 times [2021-12-21 10:29:34,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:34,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521912670] [2021-12-21 10:29:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:34,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 136 proven. 6 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-12-21 10:29:34,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:34,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521912670] [2021-12-21 10:29:34,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521912670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:29:34,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837145677] [2021-12-21 10:29:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:34,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:29:34,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:29:34,769 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:29:34,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:29:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:35,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:29:35,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:29:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 484 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-21 10:29:35,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:29:35,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837145677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:35,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:29:35,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:29:35,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652621437] [2021-12-21 10:29:35,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:35,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:35,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:35,678 INFO L87 Difference]: Start difference. First operand 164301 states and 186415 transitions. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 10:29:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:37,325 INFO L93 Difference]: Finished difference Result 299287 states and 340102 transitions. [2021-12-21 10:29:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:37,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 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 520 [2021-12-21 10:29:37,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:37,536 INFO L225 Difference]: With dead ends: 299287 [2021-12-21 10:29:37,536 INFO L226 Difference]: Without dead ends: 136206 [2021-12-21 10:29:37,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:37,606 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 120 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:37,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 325 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:29:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136206 states. [2021-12-21 10:29:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136206 to 134171. [2021-12-21 10:29:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134171 states, 134170 states have (on average 1.1093388984124617) internal successors, (148840), 134170 states have internal predecessors, (148840), 0 states have call successors, (0), 0 states 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 10:29:39,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134171 states to 134171 states and 148840 transitions. [2021-12-21 10:29:39,922 INFO L78 Accepts]: Start accepts. Automaton has 134171 states and 148840 transitions. Word has length 520 [2021-12-21 10:29:39,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:29:39,923 INFO L470 AbstractCegarLoop]: Abstraction has 134171 states and 148840 transitions. [2021-12-21 10:29:39,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 10:29:39,923 INFO L276 IsEmpty]: Start isEmpty. Operand 134171 states and 148840 transitions. [2021-12-21 10:29:40,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2021-12-21 10:29:40,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:29:40,015 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:29:40,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-21 10:29:40,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:29:40,216 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:29:40,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:29:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1802618137, now seen corresponding path program 1 times [2021-12-21 10:29:40,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:29:40,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468722278] [2021-12-21 10:29:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:40,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:29:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 217 proven. 6 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2021-12-21 10:29:40,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:29:40,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468722278] [2021-12-21 10:29:40,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468722278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:29:40,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145360309] [2021-12-21 10:29:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:29:40,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:29:40,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:29:40,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:29:40,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 10:29:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:29:40,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:29:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:29:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 516 proven. 0 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2021-12-21 10:29:41,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:29:41,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145360309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:29:41,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:29:41,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 10:29:41,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318498106] [2021-12-21 10:29:41,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:29:41,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:29:41,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:29:41,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:29:41,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:41,334 INFO L87 Difference]: Start difference. First operand 134171 states and 148840 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 10:29:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:29:42,808 INFO L93 Difference]: Finished difference Result 245547 states and 271598 transitions. [2021-12-21 10:29:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:29:42,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 591 [2021-12-21 10:29:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:29:42,964 INFO L225 Difference]: With dead ends: 245547 [2021-12-21 10:29:42,964 INFO L226 Difference]: Without dead ends: 112596 [2021-12-21 10:29:43,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:29:43,038 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 216 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:29:43,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 340 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:29:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112596 states.