./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77bdf1fd1feb16a304959a2005739d40d4ccd53f6bcac88343734528a26d2146 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:27:39,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:27:39,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:27:39,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:27:39,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:27:39,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:27:39,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:27:39,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:27:39,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:27:39,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:27:39,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:27:39,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:27:39,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:27:39,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:27:39,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:27:39,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:27:39,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:27:39,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:27:39,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:27:39,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:27:39,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:27:39,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:27:39,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:27:39,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:27:39,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:27:39,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:27:39,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:27:39,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:27:39,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:27:39,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:27:39,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:27:39,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:27:39,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:27:39,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:27:39,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:27:39,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:27:39,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:27:39,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:27:39,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:27:39,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:27:39,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:27:39,671 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:27:39,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:27:39,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:27:39,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:27:39,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:27:39,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:27:39,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:27:39,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:27:39,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:27:39,701 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:27:39,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:27:39,702 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:27:39,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:27:39,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:27:39,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:27:39,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:27:39,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:27:39,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:27:39,703 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:27:39,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:27:39,703 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:27:39,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:27:39,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:27:39,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:27:39,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:27:39,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:27:39,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:27:39,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:27:39,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:27:39,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:27:39,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:27:39,705 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:27:39,705 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:27:39,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:27:39,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:27:39,706 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77bdf1fd1feb16a304959a2005739d40d4ccd53f6bcac88343734528a26d2146 [2021-12-21 13:27:39,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:27:39,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:27:39,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:27:39,879 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:27:39,880 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:27:39,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c [2021-12-21 13:27:39,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d11bb6e/ea3c3495f86544089ff734cdc35aeb36/FLAG226ee0318 [2021-12-21 13:27:40,445 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:27:40,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c [2021-12-21 13:27:40,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d11bb6e/ea3c3495f86544089ff734cdc35aeb36/FLAG226ee0318 [2021-12-21 13:27:40,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d11bb6e/ea3c3495f86544089ff734cdc35aeb36 [2021-12-21 13:27:40,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:27:40,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:27:40,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:27:40,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:27:40,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:27:40,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:27:40" (1/1) ... [2021-12-21 13:27:40,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@119c5d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:40, skipping insertion in model container [2021-12-21 13:27:40,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:27:40" (1/1) ... [2021-12-21 13:27:40,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:27:40,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:27:41,195 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c[60917,60930] [2021-12-21 13:27:41,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:27:41,208 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:27:41,304 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c[60917,60930] [2021-12-21 13:27:41,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:27:41,328 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:27:41,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41 WrapperNode [2021-12-21 13:27:41,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:27:41,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:27:41,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:27:41,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:27:41,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41" (1/1) ... [2021-12-21 13:27:41,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41" (1/1) ... [2021-12-21 13:27:41,412 INFO L137 Inliner]: procedures = 24, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2051 [2021-12-21 13:27:41,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:27:41,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:27:41,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:27:41,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:27:41,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41" (1/1) ... [2021-12-21 13:27:41,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41" (1/1) ... [2021-12-21 13:27:41,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41" (1/1) ... [2021-12-21 13:27:41,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41" (1/1) ... [2021-12-21 13:27:41,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41" (1/1) ... [2021-12-21 13:27:41,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41" (1/1) ... [2021-12-21 13:27:41,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41" (1/1) ... [2021-12-21 13:27:41,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:27:41,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:27:41,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:27:41,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:27:41,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41" (1/1) ... [2021-12-21 13:27:41,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:27:41,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:27:41,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 13:27:41,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 13:27:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:27:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:27:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:27:41,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:27:41,708 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:27:41,709 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:27:42,842 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:27:42,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:27:42,856 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 13:27:42,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:27:42 BoogieIcfgContainer [2021-12-21 13:27:42,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:27:42,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:27:42,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:27:42,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:27:42,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:27:40" (1/3) ... [2021-12-21 13:27:42,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f03a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:27:42, skipping insertion in model container [2021-12-21 13:27:42,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:27:41" (2/3) ... [2021-12-21 13:27:42,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f03a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:27:42, skipping insertion in model container [2021-12-21 13:27:42,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:27:42" (3/3) ... [2021-12-21 13:27:42,866 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c [2021-12-21 13:27:42,873 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:27:42,873 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:27:42,937 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:27:42,944 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 13:27:42,944 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:27:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 706 states, 704 states have (on average 1.8508522727272727) internal successors, (1303), 705 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-21 13:27:42,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:42,998 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] [2021-12-21 13:27:42,999 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:43,004 INFO L85 PathProgramCache]: Analyzing trace with hash -745157910, now seen corresponding path program 1 times [2021-12-21 13:27:43,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:43,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814808257] [2021-12-21 13:27:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:43,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:43,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:43,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814808257] [2021-12-21 13:27:43,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814808257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:43,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:43,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 13:27:43,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006050946] [2021-12-21 13:27:43,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:43,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 13:27:43,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:43,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 13:27:43,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:27:43,415 INFO L87 Difference]: Start difference. First operand has 706 states, 704 states have (on average 1.8508522727272727) internal successors, (1303), 705 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:43,450 INFO L93 Difference]: Finished difference Result 867 states and 1580 transitions. [2021-12-21 13:27:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 13:27:43,452 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-12-21 13:27:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:43,464 INFO L225 Difference]: With dead ends: 867 [2021-12-21 13:27:43,465 INFO L226 Difference]: Without dead ends: 702 [2021-12-21 13:27:43,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:27:43,469 INFO L933 BasicCegarLoop]: 1300 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:43,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-21 13:27:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2021-12-21 13:27:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 1.848787446504993) internal successors, (1296), 701 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1296 transitions. [2021-12-21 13:27:43,567 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1296 transitions. Word has length 153 [2021-12-21 13:27:43,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:43,570 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1296 transitions. [2021-12-21 13:27:43,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:43,570 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1296 transitions. [2021-12-21 13:27:43,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-21 13:27:43,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:43,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:43,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:27:43,577 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:43,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1254631000, now seen corresponding path program 1 times [2021-12-21 13:27:43,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:43,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31540077] [2021-12-21 13:27:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:43,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:43,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:43,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31540077] [2021-12-21 13:27:43,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31540077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:43,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:43,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:27:43,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433345042] [2021-12-21 13:27:43,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:43,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:27:43,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:43,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:27:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:27:43,724 INFO L87 Difference]: Start difference. First operand 702 states and 1296 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:43,849 INFO L93 Difference]: Finished difference Result 862 states and 1570 transitions. [2021-12-21 13:27:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:27:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-12-21 13:27:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:43,869 INFO L225 Difference]: With dead ends: 862 [2021-12-21 13:27:43,869 INFO L226 Difference]: Without dead ends: 702 [2021-12-21 13:27:43,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:27:43,871 INFO L933 BasicCegarLoop]: 1294 mSDtfsCounter, 3 mSDsluCounter, 3819 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5113 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:43,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5113 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-21 13:27:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2021-12-21 13:27:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 1.7631954350927246) internal successors, (1236), 701 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1236 transitions. [2021-12-21 13:27:43,904 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1236 transitions. Word has length 153 [2021-12-21 13:27:43,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:43,905 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1236 transitions. [2021-12-21 13:27:43,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1236 transitions. [2021-12-21 13:27:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-21 13:27:43,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:43,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:43,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:27:43,917 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:43,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1674803025, now seen corresponding path program 1 times [2021-12-21 13:27:43,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:43,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224584258] [2021-12-21 13:27:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:43,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:44,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:44,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224584258] [2021-12-21 13:27:44,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224584258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:44,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:44,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:27:44,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318896794] [2021-12-21 13:27:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:44,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:27:44,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:44,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:27:44,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:44,138 INFO L87 Difference]: Start difference. First operand 702 states and 1236 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:44,189 INFO L93 Difference]: Finished difference Result 1001 states and 1751 transitions. [2021-12-21 13:27:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:27:44,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-12-21 13:27:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:44,193 INFO L225 Difference]: With dead ends: 1001 [2021-12-21 13:27:44,193 INFO L226 Difference]: Without dead ends: 845 [2021-12-21 13:27:44,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:44,195 INFO L933 BasicCegarLoop]: 1235 mSDtfsCounter, 237 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:44,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 2407 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-21 13:27:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 843. [2021-12-21 13:27:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 1.7517814726840855) internal successors, (1475), 842 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1475 transitions. [2021-12-21 13:27:44,231 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1475 transitions. Word has length 212 [2021-12-21 13:27:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:44,232 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1475 transitions. [2021-12-21 13:27:44,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1475 transitions. [2021-12-21 13:27:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-21 13:27:44,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:44,234 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:44,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:27:44,235 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1449767861, now seen corresponding path program 1 times [2021-12-21 13:27:44,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:44,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641919917] [2021-12-21 13:27:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:44,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:44,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:44,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641919917] [2021-12-21 13:27:44,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641919917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:44,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:44,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:27:44,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090386839] [2021-12-21 13:27:44,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:44,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:27:44,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:44,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:27:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:44,347 INFO L87 Difference]: Start difference. First operand 843 states and 1475 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:44,373 INFO L93 Difference]: Finished difference Result 1415 states and 2451 transitions. [2021-12-21 13:27:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:27:44,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-12-21 13:27:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:44,379 INFO L225 Difference]: With dead ends: 1415 [2021-12-21 13:27:44,379 INFO L226 Difference]: Without dead ends: 1118 [2021-12-21 13:27:44,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:44,390 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 237 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:44,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 2415 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-12-21 13:27:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1116. [2021-12-21 13:27:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 1.7390134529147983) internal successors, (1939), 1115 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1939 transitions. [2021-12-21 13:27:44,418 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1939 transitions. Word has length 216 [2021-12-21 13:27:44,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:44,419 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 1939 transitions. [2021-12-21 13:27:44,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:44,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1939 transitions. [2021-12-21 13:27:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-21 13:27:44,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:44,422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:44,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:27:44,423 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:44,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1203576295, now seen corresponding path program 1 times [2021-12-21 13:27:44,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:44,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861697021] [2021-12-21 13:27:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:44,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:44,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861697021] [2021-12-21 13:27:44,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861697021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:44,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:44,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:27:44,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832788052] [2021-12-21 13:27:44,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:44,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:27:44,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:27:44,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:44,548 INFO L87 Difference]: Start difference. First operand 1116 states and 1939 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:44,581 INFO L93 Difference]: Finished difference Result 2212 states and 3801 transitions. [2021-12-21 13:27:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:27:44,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2021-12-21 13:27:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:44,588 INFO L225 Difference]: With dead ends: 2212 [2021-12-21 13:27:44,588 INFO L226 Difference]: Without dead ends: 1642 [2021-12-21 13:27:44,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:44,594 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 229 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:44,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 2416 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-12-21 13:27:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2021-12-21 13:27:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.7223917022574742) internal successors, (2823), 1639 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2823 transitions. [2021-12-21 13:27:44,626 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2823 transitions. Word has length 220 [2021-12-21 13:27:44,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:44,627 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 2823 transitions. [2021-12-21 13:27:44,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2823 transitions. [2021-12-21 13:27:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-21 13:27:44,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:44,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:44,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:27:44,633 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:44,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:44,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1763181181, now seen corresponding path program 1 times [2021-12-21 13:27:44,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:44,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278468147] [2021-12-21 13:27:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:44,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:44,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:44,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278468147] [2021-12-21 13:27:44,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278468147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:44,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:44,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:27:44,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189394119] [2021-12-21 13:27:44,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:44,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:27:44,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:44,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:27:44,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:44,724 INFO L87 Difference]: Start difference. First operand 1640 states and 2823 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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 13:27:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:44,760 INFO L93 Difference]: Finished difference Result 3740 states and 6369 transitions. [2021-12-21 13:27:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:27:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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 224 [2021-12-21 13:27:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:44,768 INFO L225 Difference]: With dead ends: 3740 [2021-12-21 13:27:44,768 INFO L226 Difference]: Without dead ends: 2646 [2021-12-21 13:27:44,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:44,770 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 221 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 2417 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:44,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 2417 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-12-21 13:27:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2644. [2021-12-21 13:27:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 1.7037457434733259) internal successors, (4503), 2643 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 4503 transitions. [2021-12-21 13:27:44,828 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 4503 transitions. Word has length 224 [2021-12-21 13:27:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:44,828 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 4503 transitions. [2021-12-21 13:27:44,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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 13:27:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 4503 transitions. [2021-12-21 13:27:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-21 13:27:44,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:44,832 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:44,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:27:44,832 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:44,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1428296929, now seen corresponding path program 1 times [2021-12-21 13:27:44,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:44,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716059609] [2021-12-21 13:27:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:44,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:44,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:44,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716059609] [2021-12-21 13:27:44,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716059609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:44,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:44,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:27:44,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946168522] [2021-12-21 13:27:44,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:44,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:27:44,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:44,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:27:44,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:44,920 INFO L87 Difference]: Start difference. First operand 2644 states and 4503 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:44,974 INFO L93 Difference]: Finished difference Result 6664 states and 11241 transitions. [2021-12-21 13:27:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:27:44,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2021-12-21 13:27:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:44,988 INFO L225 Difference]: With dead ends: 6664 [2021-12-21 13:27:44,989 INFO L226 Difference]: Without dead ends: 4566 [2021-12-21 13:27:44,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:44,995 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 213 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:44,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 2418 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2021-12-21 13:27:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4564. [2021-12-21 13:27:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4564 states, 4563 states have (on average 1.6846373000219155) internal successors, (7687), 4563 states have internal predecessors, (7687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 7687 transitions. [2021-12-21 13:27:45,116 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 7687 transitions. Word has length 228 [2021-12-21 13:27:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:45,117 INFO L470 AbstractCegarLoop]: Abstraction has 4564 states and 7687 transitions. [2021-12-21 13:27:45,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 7687 transitions. [2021-12-21 13:27:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-21 13:27:45,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:45,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:45,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:27:45,122 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:45,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1256580795, now seen corresponding path program 1 times [2021-12-21 13:27:45,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:45,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459972083] [2021-12-21 13:27:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:45,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:45,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459972083] [2021-12-21 13:27:45,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459972083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:45,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:45,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:27:45,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724739257] [2021-12-21 13:27:45,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:45,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:27:45,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:45,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:27:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:27:45,229 INFO L87 Difference]: Start difference. First operand 4564 states and 7687 transitions. Second operand has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:45,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:45,711 INFO L93 Difference]: Finished difference Result 27368 states and 46209 transitions. [2021-12-21 13:27:45,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 13:27:45,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 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 232 [2021-12-21 13:27:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:45,820 INFO L225 Difference]: With dead ends: 27368 [2021-12-21 13:27:45,820 INFO L226 Difference]: Without dead ends: 23350 [2021-12-21 13:27:45,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:27:45,827 INFO L933 BasicCegarLoop]: 1220 mSDtfsCounter, 4454 mSDsluCounter, 7456 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4454 SdHoareTripleChecker+Valid, 8676 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:45,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4454 Valid, 8676 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:27:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23350 states. [2021-12-21 13:27:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23350 to 8423. [2021-12-21 13:27:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8423 states, 8422 states have (on average 1.678104963191641) internal successors, (14133), 8422 states have internal predecessors, (14133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8423 states to 8423 states and 14133 transitions. [2021-12-21 13:27:46,189 INFO L78 Accepts]: Start accepts. Automaton has 8423 states and 14133 transitions. Word has length 232 [2021-12-21 13:27:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:46,190 INFO L470 AbstractCegarLoop]: Abstraction has 8423 states and 14133 transitions. [2021-12-21 13:27:46,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 8423 states and 14133 transitions. [2021-12-21 13:27:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-21 13:27:46,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:46,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:46,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:27:46,197 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:46,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1967080448, now seen corresponding path program 1 times [2021-12-21 13:27:46,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:46,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687516667] [2021-12-21 13:27:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:46,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:46,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:46,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687516667] [2021-12-21 13:27:46,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687516667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:46,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:46,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:27:46,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664986270] [2021-12-21 13:27:46,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:46,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:27:46,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:46,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:27:46,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:27:46,298 INFO L87 Difference]: Start difference. First operand 8423 states and 14133 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:46,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:46,647 INFO L93 Difference]: Finished difference Result 24532 states and 41276 transitions. [2021-12-21 13:27:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:27:46,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-21 13:27:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:46,677 INFO L225 Difference]: With dead ends: 24532 [2021-12-21 13:27:46,678 INFO L226 Difference]: Without dead ends: 16655 [2021-12-21 13:27:46,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:27:46,695 INFO L933 BasicCegarLoop]: 1224 mSDtfsCounter, 776 mSDsluCounter, 2465 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 3689 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:46,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 3689 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:27:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16655 states. [2021-12-21 13:27:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16655 to 12506. [2021-12-21 13:27:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.6790083966413434) internal successors, (20996), 12505 states have internal predecessors, (20996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 20996 transitions. [2021-12-21 13:27:47,073 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 20996 transitions. Word has length 233 [2021-12-21 13:27:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:47,074 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 20996 transitions. [2021-12-21 13:27:47,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 20996 transitions. [2021-12-21 13:27:47,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-21 13:27:47,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:47,081 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:47,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:27:47,082 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:47,082 INFO L85 PathProgramCache]: Analyzing trace with hash 159533448, now seen corresponding path program 1 times [2021-12-21 13:27:47,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:47,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420109322] [2021-12-21 13:27:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:47,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:47,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:47,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420109322] [2021-12-21 13:27:47,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420109322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:47,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:47,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:27:47,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661604018] [2021-12-21 13:27:47,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:47,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:27:47,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:27:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:47,163 INFO L87 Difference]: Start difference. First operand 12506 states and 20996 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:47,483 INFO L93 Difference]: Finished difference Result 25097 states and 42142 transitions. [2021-12-21 13:27:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:27:47,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-21 13:27:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:47,513 INFO L225 Difference]: With dead ends: 25097 [2021-12-21 13:27:47,514 INFO L226 Difference]: Without dead ends: 18751 [2021-12-21 13:27:47,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:47,528 INFO L933 BasicCegarLoop]: 1274 mSDtfsCounter, 214 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 2477 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:47,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 2477 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18751 states. [2021-12-21 13:27:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18751 to 18749. [2021-12-21 13:27:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18749 states, 18748 states have (on average 1.6717516535097077) internal successors, (31342), 18748 states have internal predecessors, (31342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18749 states to 18749 states and 31342 transitions. [2021-12-21 13:27:48,032 INFO L78 Accepts]: Start accepts. Automaton has 18749 states and 31342 transitions. Word has length 233 [2021-12-21 13:27:48,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:48,033 INFO L470 AbstractCegarLoop]: Abstraction has 18749 states and 31342 transitions. [2021-12-21 13:27:48,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 18749 states and 31342 transitions. [2021-12-21 13:27:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-21 13:27:48,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:48,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:48,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:27:48,039 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:48,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2066182408, now seen corresponding path program 1 times [2021-12-21 13:27:48,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:48,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869385598] [2021-12-21 13:27:48,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:48,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:48,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:48,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869385598] [2021-12-21 13:27:48,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869385598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:48,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:48,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:27:48,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435232051] [2021-12-21 13:27:48,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:48,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:27:48,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:27:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:48,133 INFO L87 Difference]: Start difference. First operand 18749 states and 31342 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:48,583 INFO L93 Difference]: Finished difference Result 35049 states and 58656 transitions. [2021-12-21 13:27:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:27:48,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-21 13:27:48,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:48,628 INFO L225 Difference]: With dead ends: 35049 [2021-12-21 13:27:48,628 INFO L226 Difference]: Without dead ends: 25707 [2021-12-21 13:27:48,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:48,637 INFO L933 BasicCegarLoop]: 1320 mSDtfsCounter, 222 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 2522 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:48,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 2522 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25707 states. [2021-12-21 13:27:49,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25707 to 25705. [2021-12-21 13:27:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25705 states, 25704 states have (on average 1.6654217242452536) internal successors, (42808), 25704 states have internal predecessors, (42808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25705 states to 25705 states and 42808 transitions. [2021-12-21 13:27:49,210 INFO L78 Accepts]: Start accepts. Automaton has 25705 states and 42808 transitions. Word has length 233 [2021-12-21 13:27:49,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:49,210 INFO L470 AbstractCegarLoop]: Abstraction has 25705 states and 42808 transitions. [2021-12-21 13:27:49,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 25705 states and 42808 transitions. [2021-12-21 13:27:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-21 13:27:49,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:49,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:49,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:27:49,215 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 116201608, now seen corresponding path program 1 times [2021-12-21 13:27:49,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:49,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096441411] [2021-12-21 13:27:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:49,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:49,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:49,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096441411] [2021-12-21 13:27:49,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096441411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:49,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:49,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:27:49,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730195693] [2021-12-21 13:27:49,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:49,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:27:49,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:27:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:49,293 INFO L87 Difference]: Start difference. First operand 25705 states and 42808 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:49,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:49,818 INFO L93 Difference]: Finished difference Result 48749 states and 81330 transitions. [2021-12-21 13:27:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:27:49,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-21 13:27:49,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:49,868 INFO L225 Difference]: With dead ends: 48749 [2021-12-21 13:27:49,868 INFO L226 Difference]: Without dead ends: 35549 [2021-12-21 13:27:49,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:49,885 INFO L933 BasicCegarLoop]: 1366 mSDtfsCounter, 230 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 2567 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:49,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 2567 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35549 states. [2021-12-21 13:27:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35549 to 35547. [2021-12-21 13:27:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35547 states, 35546 states have (on average 1.6612277049457043) internal successors, (59050), 35546 states have internal predecessors, (59050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35547 states to 35547 states and 59050 transitions. [2021-12-21 13:27:50,778 INFO L78 Accepts]: Start accepts. Automaton has 35547 states and 59050 transitions. Word has length 233 [2021-12-21 13:27:50,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:50,778 INFO L470 AbstractCegarLoop]: Abstraction has 35547 states and 59050 transitions. [2021-12-21 13:27:50,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:50,779 INFO L276 IsEmpty]: Start isEmpty. Operand 35547 states and 59050 transitions. [2021-12-21 13:27:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-21 13:27:50,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:50,782 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:50,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:27:50,783 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:50,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:50,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1001177080, now seen corresponding path program 1 times [2021-12-21 13:27:50,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:50,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810453474] [2021-12-21 13:27:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:50,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:50,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:50,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810453474] [2021-12-21 13:27:50,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810453474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:50,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:50,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:27:50,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873009603] [2021-12-21 13:27:50,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:50,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:27:50,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:27:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:50,866 INFO L87 Difference]: Start difference. First operand 35547 states and 59050 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:51,716 INFO L93 Difference]: Finished difference Result 68005 states and 113160 transitions. [2021-12-21 13:27:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:27:51,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-21 13:27:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:51,801 INFO L225 Difference]: With dead ends: 68005 [2021-12-21 13:27:51,801 INFO L226 Difference]: Without dead ends: 49501 [2021-12-21 13:27:51,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:51,823 INFO L933 BasicCegarLoop]: 1412 mSDtfsCounter, 238 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:51,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 2612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49501 states. [2021-12-21 13:27:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49501 to 49499. [2021-12-21 13:27:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49499 states, 49498 states have (on average 1.6563901571780677) internal successors, (81988), 49498 states have internal predecessors, (81988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49499 states to 49499 states and 81988 transitions. [2021-12-21 13:27:53,009 INFO L78 Accepts]: Start accepts. Automaton has 49499 states and 81988 transitions. Word has length 233 [2021-12-21 13:27:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:53,010 INFO L470 AbstractCegarLoop]: Abstraction has 49499 states and 81988 transitions. [2021-12-21 13:27:53,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 49499 states and 81988 transitions. [2021-12-21 13:27:53,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-21 13:27:53,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:53,013 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:53,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:27:53,014 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:53,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1255794568, now seen corresponding path program 1 times [2021-12-21 13:27:53,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:53,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457579584] [2021-12-21 13:27:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:53,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:53,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:53,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457579584] [2021-12-21 13:27:53,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457579584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:53,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:53,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:27:53,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869550055] [2021-12-21 13:27:53,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:53,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:27:53,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:53,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:27:53,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:53,101 INFO L87 Difference]: Start difference. First operand 49499 states and 81988 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:27:54,496 INFO L93 Difference]: Finished difference Result 109735 states and 182548 transitions. [2021-12-21 13:27:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:27:54,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-21 13:27:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:27:54,611 INFO L225 Difference]: With dead ends: 109735 [2021-12-21 13:27:54,612 INFO L226 Difference]: Without dead ends: 75497 [2021-12-21 13:27:54,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:27:54,645 INFO L933 BasicCegarLoop]: 1449 mSDtfsCounter, 246 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 2648 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:27:54,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 2648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:27:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75497 states. [2021-12-21 13:27:56,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75497 to 75495. [2021-12-21 13:27:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75495 states, 75494 states have (on average 1.6524889395183724) internal successors, (124753), 75494 states have internal predecessors, (124753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75495 states to 75495 states and 124753 transitions. [2021-12-21 13:27:56,651 INFO L78 Accepts]: Start accepts. Automaton has 75495 states and 124753 transitions. Word has length 233 [2021-12-21 13:27:56,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:27:56,652 INFO L470 AbstractCegarLoop]: Abstraction has 75495 states and 124753 transitions. [2021-12-21 13:27:56,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:27:56,657 INFO L276 IsEmpty]: Start isEmpty. Operand 75495 states and 124753 transitions. [2021-12-21 13:27:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-21 13:27:56,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:27:56,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:27:56,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:27:56,675 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:27:56,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:27:56,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1347640466, now seen corresponding path program 1 times [2021-12-21 13:27:56,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:27:56,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073593555] [2021-12-21 13:27:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:27:56,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:27:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:27:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:27:56,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:27:56,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073593555] [2021-12-21 13:27:56,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073593555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:27:56,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:27:56,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:27:56,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446080958] [2021-12-21 13:27:56,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:27:56,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:27:56,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:27:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:27:56,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:27:56,751 INFO L87 Difference]: Start difference. First operand 75495 states and 124753 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:28:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:00,170 INFO L93 Difference]: Finished difference Result 248936 states and 411966 transitions. [2021-12-21 13:28:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:28:00,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 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 234 [2021-12-21 13:28:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:00,485 INFO L225 Difference]: With dead ends: 248936 [2021-12-21 13:28:00,485 INFO L226 Difference]: Without dead ends: 174053 [2021-12-21 13:28:00,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:28:00,578 INFO L933 BasicCegarLoop]: 1224 mSDtfsCounter, 774 mSDsluCounter, 2513 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 3737 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:00,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 3737 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:28:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174053 states. [2021-12-21 13:28:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174053 to 124505. [2021-12-21 13:28:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124505 states, 124504 states have (on average 1.6479711495213005) internal successors, (205179), 124504 states have internal predecessors, (205179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:28:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124505 states to 124505 states and 205179 transitions. [2021-12-21 13:28:04,369 INFO L78 Accepts]: Start accepts. Automaton has 124505 states and 205179 transitions. Word has length 234 [2021-12-21 13:28:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:28:04,370 INFO L470 AbstractCegarLoop]: Abstraction has 124505 states and 205179 transitions. [2021-12-21 13:28:04,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:28:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand 124505 states and 205179 transitions. [2021-12-21 13:28:04,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-21 13:28:04,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:28:04,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:28:04,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:28:04,373 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:28:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:28:04,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1193778039, now seen corresponding path program 1 times [2021-12-21 13:28:04,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:28:04,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609981865] [2021-12-21 13:28:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:28:04,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:28:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:28:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:28:04,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:28:04,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609981865] [2021-12-21 13:28:04,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609981865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:28:04,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:28:04,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:28:04,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216140116] [2021-12-21 13:28:04,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:28:04,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:28:04,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:28:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:28:04,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:28:04,441 INFO L87 Difference]: Start difference. First operand 124505 states and 205179 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:28:10,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:28:10,493 INFO L93 Difference]: Finished difference Result 410480 states and 677550 transitions. [2021-12-21 13:28:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:28:10,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 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 235 [2021-12-21 13:28:10,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:28:11,117 INFO L225 Difference]: With dead ends: 410480 [2021-12-21 13:28:11,119 INFO L226 Difference]: Without dead ends: 286587 [2021-12-21 13:28:11,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:28:11,292 INFO L933 BasicCegarLoop]: 1224 mSDtfsCounter, 772 mSDsluCounter, 2561 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 3785 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:28:11,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 3785 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:28:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286587 states.