./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20a3f63356fd659246c00e5ede12e6614dd9fbac2adaea7d2f156fbd054111cd --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 18:40:28,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 18:40:28,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 18:40:28,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 18:40:28,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 18:40:28,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 18:40:28,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 18:40:28,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 18:40:28,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 18:40:28,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 18:40:28,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 18:40:28,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 18:40:28,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 18:40:28,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 18:40:28,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 18:40:28,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 18:40:28,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 18:40:28,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 18:40:28,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 18:40:28,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 18:40:28,632 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 18:40:28,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 18:40:28,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 18:40:28,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 18:40:28,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 18:40:28,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 18:40:28,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 18:40:28,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 18:40:28,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 18:40:28,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 18:40:28,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 18:40:28,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 18:40:28,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 18:40:28,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 18:40:28,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 18:40:28,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 18:40:28,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 18:40:28,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 18:40:28,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 18:40:28,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 18:40:28,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 18:40:28,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 18:40:28,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 18:40:28,666 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 18:40:28,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 18:40:28,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 18:40:28,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 18:40:28,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 18:40:28,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 18:40:28,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 18:40:28,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 18:40:28,669 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 18:40:28,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 18:40:28,669 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 18:40:28,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 18:40:28,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 18:40:28,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 18:40:28,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 18:40:28,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 18:40:28,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 18:40:28,671 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 18:40:28,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 18:40:28,671 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 18:40:28,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 18:40:28,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 18:40:28,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 18:40:28,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 18:40:28,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 18:40:28,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 18:40:28,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 18:40:28,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 18:40:28,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 18:40:28,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 18:40:28,674 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 18:40:28,674 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 18:40:28,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 18:40:28,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20a3f63356fd659246c00e5ede12e6614dd9fbac2adaea7d2f156fbd054111cd [2022-07-19 18:40:28,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 18:40:28,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 18:40:28,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 18:40:28,939 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 18:40:28,940 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 18:40:28,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-07-19 18:40:29,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115f4bcc7/29571ea9c2e94dd49cb05e43871ef745/FLAGd9bd4b1c4 [2022-07-19 18:40:29,546 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 18:40:29,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-07-19 18:40:29,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115f4bcc7/29571ea9c2e94dd49cb05e43871ef745/FLAGd9bd4b1c4 [2022-07-19 18:40:29,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115f4bcc7/29571ea9c2e94dd49cb05e43871ef745 [2022-07-19 18:40:29,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 18:40:29,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 18:40:29,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 18:40:29,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 18:40:29,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 18:40:29,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 06:40:29" (1/1) ... [2022-07-19 18:40:29,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e6740a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:29, skipping insertion in model container [2022-07-19 18:40:29,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 06:40:29" (1/1) ... [2022-07-19 18:40:29,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 18:40:29,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 18:40:30,209 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15440,15453] [2022-07-19 18:40:30,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 18:40:30,285 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 18:40:30,371 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15440,15453] [2022-07-19 18:40:30,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 18:40:30,432 INFO L208 MainTranslator]: Completed translation [2022-07-19 18:40:30,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30 WrapperNode [2022-07-19 18:40:30,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 18:40:30,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 18:40:30,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 18:40:30,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 18:40:30,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30" (1/1) ... [2022-07-19 18:40:30,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30" (1/1) ... [2022-07-19 18:40:30,515 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1262 [2022-07-19 18:40:30,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 18:40:30,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 18:40:30,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 18:40:30,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 18:40:30,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30" (1/1) ... [2022-07-19 18:40:30,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30" (1/1) ... [2022-07-19 18:40:30,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30" (1/1) ... [2022-07-19 18:40:30,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30" (1/1) ... [2022-07-19 18:40:30,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30" (1/1) ... [2022-07-19 18:40:30,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30" (1/1) ... [2022-07-19 18:40:30,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30" (1/1) ... [2022-07-19 18:40:30,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 18:40:30,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 18:40:30,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 18:40:30,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 18:40:30,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30" (1/1) ... [2022-07-19 18:40:30,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 18:40:30,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 18:40:30,637 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) [2022-07-19 18:40:30,659 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 [2022-07-19 18:40:30,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 18:40:30,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 18:40:30,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 18:40:30,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 18:40:30,838 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 18:40:30,839 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 18:40:31,757 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 18:40:31,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 18:40:31,768 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 18:40:31,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 06:40:31 BoogieIcfgContainer [2022-07-19 18:40:31,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 18:40:31,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 18:40:31,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 18:40:31,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 18:40:31,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 06:40:29" (1/3) ... [2022-07-19 18:40:31,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7025f2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 06:40:31, skipping insertion in model container [2022-07-19 18:40:31,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:40:30" (2/3) ... [2022-07-19 18:40:31,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7025f2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 06:40:31, skipping insertion in model container [2022-07-19 18:40:31,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 06:40:31" (3/3) ... [2022-07-19 18:40:31,778 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-07-19 18:40:31,790 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 18:40:31,790 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 18:40:31,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 18:40:31,844 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e14f5fe, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@586b5837 [2022-07-19 18:40:31,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 18:40:31,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 331 states, 329 states have (on average 1.7750759878419453) internal successors, (584), 330 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-19 18:40:31,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:31,874 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:31,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:31,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1173717287, now seen corresponding path program 1 times [2022-07-19 18:40:31,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:31,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112856852] [2022-07-19 18:40:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:31,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:32,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:32,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112856852] [2022-07-19 18:40:32,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112856852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:32,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:32,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:40:32,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359775005] [2022-07-19 18:40:32,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:32,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:40:32,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:32,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:40:32,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:40:32,437 INFO L87 Difference]: Start difference. First operand has 331 states, 329 states have (on average 1.7750759878419453) internal successors, (584), 330 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:32,600 INFO L93 Difference]: Finished difference Result 640 states and 1112 transitions. [2022-07-19 18:40:32,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:40:32,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2022-07-19 18:40:32,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:32,616 INFO L225 Difference]: With dead ends: 640 [2022-07-19 18:40:32,617 INFO L226 Difference]: Without dead ends: 523 [2022-07-19 18:40:32,620 INFO L412 NwaCegarLoop]: 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 [2022-07-19 18:40:32,623 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 382 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:32,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 939 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 18:40:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-07-19 18:40:32,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 521. [2022-07-19 18:40:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.4923076923076923) internal successors, (776), 520 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 776 transitions. [2022-07-19 18:40:32,726 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 776 transitions. Word has length 152 [2022-07-19 18:40:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:32,728 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 776 transitions. [2022-07-19 18:40:32,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 776 transitions. [2022-07-19 18:40:32,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-19 18:40:32,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:32,736 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:32,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 18:40:32,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:32,738 INFO L85 PathProgramCache]: Analyzing trace with hash 341515684, now seen corresponding path program 1 times [2022-07-19 18:40:32,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:32,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987764407] [2022-07-19 18:40:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:32,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:32,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:32,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987764407] [2022-07-19 18:40:33,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987764407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:33,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:33,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 18:40:33,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114418761] [2022-07-19 18:40:33,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:33,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 18:40:33,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:33,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 18:40:33,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 18:40:33,005 INFO L87 Difference]: Start difference. First operand 521 states and 776 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:33,157 INFO L93 Difference]: Finished difference Result 1528 states and 2269 transitions. [2022-07-19 18:40:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 18:40:33,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2022-07-19 18:40:33,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:33,165 INFO L225 Difference]: With dead ends: 1528 [2022-07-19 18:40:33,165 INFO L226 Difference]: Without dead ends: 1016 [2022-07-19 18:40:33,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:40:33,174 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 1049 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:33,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1049 Valid, 1197 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:40:33,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-07-19 18:40:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 1014. [2022-07-19 18:40:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 1.4777887462981243) internal successors, (1497), 1013 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1497 transitions. [2022-07-19 18:40:33,267 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1497 transitions. Word has length 152 [2022-07-19 18:40:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:33,270 INFO L495 AbstractCegarLoop]: Abstraction has 1014 states and 1497 transitions. [2022-07-19 18:40:33,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1497 transitions. [2022-07-19 18:40:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-19 18:40:33,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:33,279 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:33,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 18:40:33,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:33,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1004817416, now seen corresponding path program 1 times [2022-07-19 18:40:33,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:33,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261712103] [2022-07-19 18:40:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:33,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:33,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261712103] [2022-07-19 18:40:33,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261712103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:33,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:33,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:40:33,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919747572] [2022-07-19 18:40:33,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:33,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:40:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:40:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:40:33,351 INFO L87 Difference]: Start difference. First operand 1014 states and 1497 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 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) [2022-07-19 18:40:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:33,465 INFO L93 Difference]: Finished difference Result 3004 states and 4429 transitions. [2022-07-19 18:40:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:40:33,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 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 [2022-07-19 18:40:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:33,474 INFO L225 Difference]: With dead ends: 3004 [2022-07-19 18:40:33,474 INFO L226 Difference]: Without dead ends: 2018 [2022-07-19 18:40:33,477 INFO L412 NwaCegarLoop]: 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 [2022-07-19 18:40:33,481 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 471 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:33,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1219 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:40:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-07-19 18:40:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1016. [2022-07-19 18:40:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 1.476847290640394) internal successors, (1499), 1015 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1499 transitions. [2022-07-19 18:40:33,589 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1499 transitions. Word has length 153 [2022-07-19 18:40:33,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:33,589 INFO L495 AbstractCegarLoop]: Abstraction has 1016 states and 1499 transitions. [2022-07-19 18:40:33,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 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) [2022-07-19 18:40:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1499 transitions. [2022-07-19 18:40:33,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-19 18:40:33,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:33,593 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:33,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 18:40:33,594 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash -703528603, now seen corresponding path program 1 times [2022-07-19 18:40:33,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:33,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566840312] [2022-07-19 18:40:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:33,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:33,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:33,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566840312] [2022-07-19 18:40:33,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566840312] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:33,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:33,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 18:40:33,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294606789] [2022-07-19 18:40:33,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:33,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 18:40:33,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:33,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 18:40:33,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 18:40:33,764 INFO L87 Difference]: Start difference. First operand 1016 states and 1499 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:34,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:34,049 INFO L93 Difference]: Finished difference Result 2934 states and 4309 transitions. [2022-07-19 18:40:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 18:40:34,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 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 154 [2022-07-19 18:40:34,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:34,058 INFO L225 Difference]: With dead ends: 2934 [2022-07-19 18:40:34,058 INFO L226 Difference]: Without dead ends: 1948 [2022-07-19 18:40:34,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:40:34,066 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 951 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:34,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1234 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 18:40:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2022-07-19 18:40:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1946. [2022-07-19 18:40:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1945 states have (on average 1.45706940874036) internal successors, (2834), 1945 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2834 transitions. [2022-07-19 18:40:34,262 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2834 transitions. Word has length 154 [2022-07-19 18:40:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:34,263 INFO L495 AbstractCegarLoop]: Abstraction has 1946 states and 2834 transitions. [2022-07-19 18:40:34,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2834 transitions. [2022-07-19 18:40:34,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-19 18:40:34,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:34,267 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:34,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 18:40:34,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:34,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1206556903, now seen corresponding path program 1 times [2022-07-19 18:40:34,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:34,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687979609] [2022-07-19 18:40:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:34,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:34,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:34,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687979609] [2022-07-19 18:40:34,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687979609] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:34,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:34,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:40:34,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365814124] [2022-07-19 18:40:34,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:34,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:40:34,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:34,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:40:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:40:34,323 INFO L87 Difference]: Start difference. First operand 1946 states and 2834 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:34,622 INFO L93 Difference]: Finished difference Result 5762 states and 8382 transitions. [2022-07-19 18:40:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:40:34,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2022-07-19 18:40:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:34,637 INFO L225 Difference]: With dead ends: 5762 [2022-07-19 18:40:34,637 INFO L226 Difference]: Without dead ends: 3860 [2022-07-19 18:40:34,642 INFO L412 NwaCegarLoop]: 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 [2022-07-19 18:40:34,642 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 457 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:34,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 1085 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:40:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2022-07-19 18:40:34,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 1950. [2022-07-19 18:40:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 1.456131349409954) internal successors, (2838), 1949 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 2838 transitions. [2022-07-19 18:40:34,822 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 2838 transitions. Word has length 155 [2022-07-19 18:40:34,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:34,824 INFO L495 AbstractCegarLoop]: Abstraction has 1950 states and 2838 transitions. [2022-07-19 18:40:34,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:34,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 2838 transitions. [2022-07-19 18:40:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-19 18:40:34,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:34,830 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:34,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 18:40:34,831 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:34,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:34,831 INFO L85 PathProgramCache]: Analyzing trace with hash 109885862, now seen corresponding path program 1 times [2022-07-19 18:40:34,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:34,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129973426] [2022-07-19 18:40:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:34,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:34,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:34,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129973426] [2022-07-19 18:40:34,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129973426] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:34,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:34,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 18:40:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316943876] [2022-07-19 18:40:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:34,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 18:40:34,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 18:40:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 18:40:34,982 INFO L87 Difference]: Start difference. First operand 1950 states and 2838 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:35,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:35,362 INFO L93 Difference]: Finished difference Result 5638 states and 8174 transitions. [2022-07-19 18:40:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 18:40:35,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2022-07-19 18:40:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:35,377 INFO L225 Difference]: With dead ends: 5638 [2022-07-19 18:40:35,377 INFO L226 Difference]: Without dead ends: 3736 [2022-07-19 18:40:35,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:40:35,381 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 949 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:35,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 1219 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:40:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2022-07-19 18:40:35,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3734. [2022-07-19 18:40:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3734 states, 3733 states have (on average 1.4358424859362444) internal successors, (5360), 3733 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 5360 transitions. [2022-07-19 18:40:35,739 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 5360 transitions. Word has length 156 [2022-07-19 18:40:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:35,739 INFO L495 AbstractCegarLoop]: Abstraction has 3734 states and 5360 transitions. [2022-07-19 18:40:35,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 5360 transitions. [2022-07-19 18:40:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 18:40:35,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:35,744 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:35,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 18:40:35,745 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:35,745 INFO L85 PathProgramCache]: Analyzing trace with hash -289159494, now seen corresponding path program 1 times [2022-07-19 18:40:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:35,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6137063] [2022-07-19 18:40:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:35,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:35,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:35,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6137063] [2022-07-19 18:40:35,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6137063] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:35,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:35,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:40:35,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019028945] [2022-07-19 18:40:35,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:35,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:40:35,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:35,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:40:35,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:40:35,797 INFO L87 Difference]: Start difference. First operand 3734 states and 5360 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:36,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:36,380 INFO L93 Difference]: Finished difference Result 10770 states and 15502 transitions. [2022-07-19 18:40:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:40:36,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2022-07-19 18:40:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:36,407 INFO L225 Difference]: With dead ends: 10770 [2022-07-19 18:40:36,407 INFO L226 Difference]: Without dead ends: 7376 [2022-07-19 18:40:36,413 INFO L412 NwaCegarLoop]: 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 [2022-07-19 18:40:36,414 INFO L413 NwaCegarLoop]: 922 mSDtfsCounter, 443 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:36,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1395 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:40:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2022-07-19 18:40:36,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 3742. [2022-07-19 18:40:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3742 states, 3741 states have (on average 1.4349104517508688) internal successors, (5368), 3741 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:36,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 5368 transitions. [2022-07-19 18:40:36,858 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 5368 transitions. Word has length 157 [2022-07-19 18:40:36,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:36,858 INFO L495 AbstractCegarLoop]: Abstraction has 3742 states and 5368 transitions. [2022-07-19 18:40:36,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 5368 transitions. [2022-07-19 18:40:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-19 18:40:36,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:36,863 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:36,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 18:40:36,864 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:36,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:36,864 INFO L85 PathProgramCache]: Analyzing trace with hash 405722455, now seen corresponding path program 1 times [2022-07-19 18:40:36,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:36,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885666062] [2022-07-19 18:40:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:36,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:36,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:36,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885666062] [2022-07-19 18:40:36,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885666062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:36,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:36,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 18:40:36,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622018389] [2022-07-19 18:40:37,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:37,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 18:40:37,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:37,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 18:40:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:40:37,001 INFO L87 Difference]: Start difference. First operand 3742 states and 5368 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:37,701 INFO L93 Difference]: Finished difference Result 10856 states and 15513 transitions. [2022-07-19 18:40:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 18:40:37,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2022-07-19 18:40:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:37,730 INFO L225 Difference]: With dead ends: 10856 [2022-07-19 18:40:37,731 INFO L226 Difference]: Without dead ends: 7202 [2022-07-19 18:40:37,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:40:37,737 INFO L413 NwaCegarLoop]: 796 mSDtfsCounter, 1291 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:37,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 1226 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 18:40:37,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7202 states. [2022-07-19 18:40:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7202 to 7200. [2022-07-19 18:40:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 1.4147798305320183) internal successors, (10185), 7199 states have internal predecessors, (10185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 10185 transitions. [2022-07-19 18:40:38,624 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 10185 transitions. Word has length 158 [2022-07-19 18:40:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:38,624 INFO L495 AbstractCegarLoop]: Abstraction has 7200 states and 10185 transitions. [2022-07-19 18:40:38,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 10185 transitions. [2022-07-19 18:40:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-19 18:40:38,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:38,635 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:38,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 18:40:38,637 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:38,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:38,638 INFO L85 PathProgramCache]: Analyzing trace with hash 427918951, now seen corresponding path program 1 times [2022-07-19 18:40:38,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:38,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210629193] [2022-07-19 18:40:38,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:38,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:38,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210629193] [2022-07-19 18:40:38,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210629193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:38,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:38,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 18:40:38,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193428396] [2022-07-19 18:40:38,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:38,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 18:40:38,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:38,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 18:40:38,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 18:40:38,737 INFO L87 Difference]: Start difference. First operand 7200 states and 10185 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:39,288 INFO L93 Difference]: Finished difference Result 12624 states and 17845 transitions. [2022-07-19 18:40:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 18:40:39,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2022-07-19 18:40:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:39,299 INFO L225 Difference]: With dead ends: 12624 [2022-07-19 18:40:39,300 INFO L226 Difference]: Without dead ends: 5498 [2022-07-19 18:40:39,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:40:39,309 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 65 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1477 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 [2022-07-19 18:40:39,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1477 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:40:39,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5498 states. [2022-07-19 18:40:39,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5498 to 5498. [2022-07-19 18:40:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5498 states, 5497 states have (on average 1.4122248499181371) internal successors, (7763), 5497 states have internal predecessors, (7763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5498 states to 5498 states and 7763 transitions. [2022-07-19 18:40:39,848 INFO L78 Accepts]: Start accepts. Automaton has 5498 states and 7763 transitions. Word has length 158 [2022-07-19 18:40:39,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:39,848 INFO L495 AbstractCegarLoop]: Abstraction has 5498 states and 7763 transitions. [2022-07-19 18:40:39,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:39,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5498 states and 7763 transitions. [2022-07-19 18:40:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-19 18:40:39,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:39,856 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:39,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 18:40:39,856 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:39,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash -479009960, now seen corresponding path program 1 times [2022-07-19 18:40:39,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:39,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152034375] [2022-07-19 18:40:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:39,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:39,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:39,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152034375] [2022-07-19 18:40:39,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152034375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:39,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:39,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:40:39,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6852089] [2022-07-19 18:40:39,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:39,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:40:39,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:39,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:40:39,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:40:39,904 INFO L87 Difference]: Start difference. First operand 5498 states and 7763 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:40,523 INFO L93 Difference]: Finished difference Result 12146 states and 17705 transitions. [2022-07-19 18:40:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:40:40,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2022-07-19 18:40:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:40,538 INFO L225 Difference]: With dead ends: 12146 [2022-07-19 18:40:40,539 INFO L226 Difference]: Without dead ends: 7260 [2022-07-19 18:40:40,545 INFO L412 NwaCegarLoop]: 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 [2022-07-19 18:40:40,546 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 233 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:40,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 976 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:40:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7260 states. [2022-07-19 18:40:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7260 to 7114. [2022-07-19 18:40:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 7113 states have (on average 1.4580345845634752) internal successors, (10371), 7113 states have internal predecessors, (10371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 10371 transitions. [2022-07-19 18:40:41,208 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 10371 transitions. Word has length 159 [2022-07-19 18:40:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:41,208 INFO L495 AbstractCegarLoop]: Abstraction has 7114 states and 10371 transitions. [2022-07-19 18:40:41,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 10371 transitions. [2022-07-19 18:40:41,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-19 18:40:41,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:41,217 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:41,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 18:40:41,217 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:41,218 INFO L85 PathProgramCache]: Analyzing trace with hash -513222824, now seen corresponding path program 1 times [2022-07-19 18:40:41,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:41,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112118502] [2022-07-19 18:40:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:41,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:41,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:41,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112118502] [2022-07-19 18:40:41,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112118502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:41,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:41,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 18:40:41,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678731719] [2022-07-19 18:40:41,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:41,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 18:40:41,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:41,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 18:40:41,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 18:40:41,366 INFO L87 Difference]: Start difference. First operand 7114 states and 10371 transitions. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:44,619 INFO L93 Difference]: Finished difference Result 31490 states and 47926 transitions. [2022-07-19 18:40:44,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 18:40:44,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 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 162 [2022-07-19 18:40:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:44,683 INFO L225 Difference]: With dead ends: 31490 [2022-07-19 18:40:44,683 INFO L226 Difference]: Without dead ends: 25126 [2022-07-19 18:40:44,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2022-07-19 18:40:44,698 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 4205 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4205 SdHoareTripleChecker+Valid, 2451 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:44,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4205 Valid, 2451 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 18:40:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25126 states. [2022-07-19 18:40:46,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25126 to 17214. [2022-07-19 18:40:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17214 states, 17213 states have (on average 1.4880032533550223) internal successors, (25613), 17213 states have internal predecessors, (25613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:46,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17214 states to 17214 states and 25613 transitions. [2022-07-19 18:40:46,554 INFO L78 Accepts]: Start accepts. Automaton has 17214 states and 25613 transitions. Word has length 162 [2022-07-19 18:40:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:46,555 INFO L495 AbstractCegarLoop]: Abstraction has 17214 states and 25613 transitions. [2022-07-19 18:40:46,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 8 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 17214 states and 25613 transitions. [2022-07-19 18:40:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-19 18:40:46,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:46,568 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:46,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 18:40:46,569 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:46,569 INFO L85 PathProgramCache]: Analyzing trace with hash -707459681, now seen corresponding path program 1 times [2022-07-19 18:40:46,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:46,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82924357] [2022-07-19 18:40:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:46,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:46,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82924357] [2022-07-19 18:40:46,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82924357] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:46,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:46,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 18:40:46,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729028223] [2022-07-19 18:40:46,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:46,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 18:40:46,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:46,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 18:40:46,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 18:40:46,676 INFO L87 Difference]: Start difference. First operand 17214 states and 25613 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:48,464 INFO L93 Difference]: Finished difference Result 33258 states and 51099 transitions. [2022-07-19 18:40:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 18:40:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 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 162 [2022-07-19 18:40:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:48,511 INFO L225 Difference]: With dead ends: 33258 [2022-07-19 18:40:48,511 INFO L226 Difference]: Without dead ends: 21376 [2022-07-19 18:40:48,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 18:40:48,533 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 621 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:48,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 1013 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:40:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21376 states. [2022-07-19 18:40:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21376 to 21374. [2022-07-19 18:40:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21374 states, 21373 states have (on average 1.4983858138773218) internal successors, (32025), 21373 states have internal predecessors, (32025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21374 states to 21374 states and 32025 transitions. [2022-07-19 18:40:50,860 INFO L78 Accepts]: Start accepts. Automaton has 21374 states and 32025 transitions. Word has length 162 [2022-07-19 18:40:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:50,861 INFO L495 AbstractCegarLoop]: Abstraction has 21374 states and 32025 transitions. [2022-07-19 18:40:50,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 21374 states and 32025 transitions. [2022-07-19 18:40:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-19 18:40:50,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:50,877 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:50,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 18:40:50,878 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:50,878 INFO L85 PathProgramCache]: Analyzing trace with hash -286071921, now seen corresponding path program 1 times [2022-07-19 18:40:50,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:50,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285736022] [2022-07-19 18:40:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:50,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:50,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285736022] [2022-07-19 18:40:50,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285736022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:50,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:50,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 18:40:50,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421406018] [2022-07-19 18:40:50,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:50,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 18:40:50,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:50,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 18:40:50,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 18:40:50,982 INFO L87 Difference]: Start difference. First operand 21374 states and 32025 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:40:54,288 INFO L93 Difference]: Finished difference Result 56244 states and 84126 transitions. [2022-07-19 18:40:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 18:40:54,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 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 162 [2022-07-19 18:40:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:40:54,346 INFO L225 Difference]: With dead ends: 56244 [2022-07-19 18:40:54,346 INFO L226 Difference]: Without dead ends: 35002 [2022-07-19 18:40:54,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:40:54,381 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 934 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:40:54,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 1235 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:40:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35002 states. [2022-07-19 18:40:58,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35002 to 35000. [2022-07-19 18:40:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35000 states, 34999 states have (on average 1.4782993799822852) internal successors, (51739), 34999 states have internal predecessors, (51739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35000 states to 35000 states and 51739 transitions. [2022-07-19 18:40:58,483 INFO L78 Accepts]: Start accepts. Automaton has 35000 states and 51739 transitions. Word has length 162 [2022-07-19 18:40:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:40:58,483 INFO L495 AbstractCegarLoop]: Abstraction has 35000 states and 51739 transitions. [2022-07-19 18:40:58,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:40:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 35000 states and 51739 transitions. [2022-07-19 18:40:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-19 18:40:58,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:40:58,501 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:40:58,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 18:40:58,501 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:40:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:40:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash 540747690, now seen corresponding path program 1 times [2022-07-19 18:40:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:40:58,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436639261] [2022-07-19 18:40:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:40:58,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:40:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:40:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:40:58,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:40:58,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436639261] [2022-07-19 18:40:58,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436639261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:40:58,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:40:58,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 18:40:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433302012] [2022-07-19 18:40:58,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:40:58,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 18:40:58,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:40:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 18:40:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 18:40:58,591 INFO L87 Difference]: Start difference. First operand 35000 states and 51739 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:41:01,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:41:01,951 INFO L93 Difference]: Finished difference Result 62916 states and 93045 transitions. [2022-07-19 18:41:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 18:41:01,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 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 164 [2022-07-19 18:41:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:41:02,003 INFO L225 Difference]: With dead ends: 62916 [2022-07-19 18:41:02,003 INFO L226 Difference]: Without dead ends: 35000 [2022-07-19 18:41:02,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:41:02,040 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 53 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:41:02,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1438 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:41:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35000 states. [2022-07-19 18:41:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35000 to 35000. [2022-07-19 18:41:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35000 states, 34999 states have (on average 1.4782708077373639) internal successors, (51738), 34999 states have internal predecessors, (51738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:41:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35000 states to 35000 states and 51738 transitions. [2022-07-19 18:41:05,974 INFO L78 Accepts]: Start accepts. Automaton has 35000 states and 51738 transitions. Word has length 164 [2022-07-19 18:41:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:41:05,979 INFO L495 AbstractCegarLoop]: Abstraction has 35000 states and 51738 transitions. [2022-07-19 18:41:05,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:41:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 35000 states and 51738 transitions. [2022-07-19 18:41:06,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-19 18:41:06,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:41:06,017 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:41:06,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 18:41:06,024 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:41:06,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:41:06,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1686107341, now seen corresponding path program 1 times [2022-07-19 18:41:06,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:41:06,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198467142] [2022-07-19 18:41:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:41:06,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:41:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:41:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:41:06,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:41:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198467142] [2022-07-19 18:41:06,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198467142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:41:06,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:41:06,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:41:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647311961] [2022-07-19 18:41:06,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:41:06,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:41:06,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:41:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:41:06,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:41:06,097 INFO L87 Difference]: Start difference. First operand 35000 states and 51738 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:41:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:41:11,565 INFO L93 Difference]: Finished difference Result 87989 states and 130465 transitions. [2022-07-19 18:41:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:41:11,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 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 164 [2022-07-19 18:41:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:41:11,659 INFO L225 Difference]: With dead ends: 87989 [2022-07-19 18:41:11,660 INFO L226 Difference]: Without dead ends: 54467 [2022-07-19 18:41:11,704 INFO L412 NwaCegarLoop]: 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 [2022-07-19 18:41:11,705 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 395 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:41:11,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 1047 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:41:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54467 states. [2022-07-19 18:41:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54467 to 54465. [2022-07-19 18:41:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54465 states, 54464 states have (on average 1.4610568448883667) internal successors, (79575), 54464 states have internal predecessors, (79575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:41:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54465 states to 54465 states and 79575 transitions. [2022-07-19 18:41:17,862 INFO L78 Accepts]: Start accepts. Automaton has 54465 states and 79575 transitions. Word has length 164 [2022-07-19 18:41:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:41:17,862 INFO L495 AbstractCegarLoop]: Abstraction has 54465 states and 79575 transitions. [2022-07-19 18:41:17,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:41:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 54465 states and 79575 transitions. [2022-07-19 18:41:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-19 18:41:17,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:41:17,886 INFO L195 NwaCegarLoop]: 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] [2022-07-19 18:41:17,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 18:41:17,887 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:41:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:41:17,887 INFO L85 PathProgramCache]: Analyzing trace with hash -578160281, now seen corresponding path program 1 times [2022-07-19 18:41:17,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:41:17,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137455683] [2022-07-19 18:41:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:41:17,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:41:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:41:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:41:17,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:41:17,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137455683] [2022-07-19 18:41:17,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137455683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:41:17,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:41:17,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:41:17,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214110507] [2022-07-19 18:41:17,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:41:17,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:41:17,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:41:17,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:41:17,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:41:17,943 INFO L87 Difference]: Start difference. First operand 54465 states and 79575 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:41:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:41:27,242 INFO L93 Difference]: Finished difference Result 126465 states and 186745 transitions. [2022-07-19 18:41:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:41:27,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 168 [2022-07-19 18:41:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:41:27,378 INFO L225 Difference]: With dead ends: 126465 [2022-07-19 18:41:27,379 INFO L226 Difference]: Without dead ends: 82761 [2022-07-19 18:41:27,415 INFO L412 NwaCegarLoop]: 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 [2022-07-19 18:41:27,415 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 301 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:41:27,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1000 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:41:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82761 states.