./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2c3b1a53bc376cbb6283db57f6430d0a17b3acc99aa70ab198c7c36e6e59ecc9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 18:25:35,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:25:35,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:25:35,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:25:35,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:25:35,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:25:35,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:25:35,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:25:35,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:25:35,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:25:35,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:25:35,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:25:35,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:25:35,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:25:35,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:25:35,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:25:35,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:25:35,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:25:35,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:25:35,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:25:35,584 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:25:35,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:25:35,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:25:35,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:25:35,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:25:35,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:25:35,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:25:35,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:25:35,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:25:35,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:25:35,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:25:35,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:25:35,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:25:35,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:25:35,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:25:35,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:25:35,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:25:35,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:25:35,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:25:35,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:25:35,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:25:35,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:25:35,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:25:35,626 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:25:35,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:25:35,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:25:35,627 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:25:35,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:25:35,627 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:25:35,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:25:35,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:25:35,628 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:25:35,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:25:35,629 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:25:35,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:25:35,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:25:35,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:25:35,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:25:35,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:25:35,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:25:35,630 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:25:35,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:25:35,631 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:25:35,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:25:35,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:25:35,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:25:35,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:25:35,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:25:35,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:25:35,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:25:35,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:25:35,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:25:35,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:25:35,632 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:25:35,633 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:25:35,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:25:35,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c3b1a53bc376cbb6283db57f6430d0a17b3acc99aa70ab198c7c36e6e59ecc9 [2022-07-13 18:25:35,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:25:35,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:25:35,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:25:35,836 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:25:35,837 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:25:35,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c [2022-07-13 18:25:35,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/311a42d94/298f0aecf5ff406b90cad003c8416c66/FLAG45b043358 [2022-07-13 18:25:36,286 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:25:36,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c [2022-07-13 18:25:36,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/311a42d94/298f0aecf5ff406b90cad003c8416c66/FLAG45b043358 [2022-07-13 18:25:36,302 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/311a42d94/298f0aecf5ff406b90cad003c8416c66 [2022-07-13 18:25:36,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:25:36,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:25:36,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:25:36,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:25:36,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:25:36,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f47877c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36, skipping insertion in model container [2022-07-13 18:25:36,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:25:36,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:25:36,489 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c[11270,11283] [2022-07-13 18:25:36,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:25:36,500 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:25:36,539 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c[11270,11283] [2022-07-13 18:25:36,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:25:36,553 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:25:36,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36 WrapperNode [2022-07-13 18:25:36,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:25:36,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:25:36,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:25:36,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:25:36,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,582 INFO L137 Inliner]: procedures = 24, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 334 [2022-07-13 18:25:36,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:25:36,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:25:36,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:25:36,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:25:36,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:25:36,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:25:36,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:25:36,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:25:36,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36" (1/1) ... [2022-07-13 18:25:36,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:25:36,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:25:36,653 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) [2022-07-13 18:25:36,655 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 [2022-07-13 18:25:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:25:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:25:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:25:36,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:25:36,747 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:25:36,748 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:25:37,053 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:25:37,058 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:25:37,059 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 18:25:37,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:25:37 BoogieIcfgContainer [2022-07-13 18:25:37,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:25:37,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:25:37,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:25:37,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:25:37,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:25:36" (1/3) ... [2022-07-13 18:25:37,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fbc418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:25:37, skipping insertion in model container [2022-07-13 18:25:37,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:36" (2/3) ... [2022-07-13 18:25:37,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fbc418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:25:37, skipping insertion in model container [2022-07-13 18:25:37,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:25:37" (3/3) ... [2022-07-13 18:25:37,066 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c [2022-07-13 18:25:37,076 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:25:37,077 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:25:37,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:25:37,112 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@64ee56b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@27d358a0 [2022-07-13 18:25:37,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:25:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 91 states have (on average 1.7252747252747254) internal successors, (157), 92 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) [2022-07-13 18:25:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 18:25:37,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:37,121 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] [2022-07-13 18:25:37,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:37,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:37,125 INFO L85 PathProgramCache]: Analyzing trace with hash 8392247, now seen corresponding path program 1 times [2022-07-13 18:25:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:37,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151988150] [2022-07-13 18:25:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:37,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:37,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:37,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151988150] [2022-07-13 18:25:37,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151988150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:37,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:37,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 18:25:37,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857036579] [2022-07-13 18:25:37,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:37,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 18:25:37,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:37,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 18:25:37,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 18:25:37,348 INFO L87 Difference]: Start difference. First operand has 93 states, 91 states have (on average 1.7252747252747254) internal successors, (157), 92 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) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:37,371 INFO L93 Difference]: Finished difference Result 150 states and 246 transitions. [2022-07-13 18:25:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 18:25:37,373 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2022-07-13 18:25:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:37,379 INFO L225 Difference]: With dead ends: 150 [2022-07-13 18:25:37,380 INFO L226 Difference]: Without dead ends: 89 [2022-07-13 18:25:37,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 18:25:37,384 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:37,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-13 18:25:37,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-13 18:25:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.7045454545454546) internal successors, (150), 88 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 150 transitions. [2022-07-13 18:25:37,421 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 150 transitions. Word has length 33 [2022-07-13 18:25:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:37,422 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 150 transitions. [2022-07-13 18:25:37,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 150 transitions. [2022-07-13 18:25:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 18:25:37,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:37,426 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] [2022-07-13 18:25:37,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:25:37,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:37,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:37,427 INFO L85 PathProgramCache]: Analyzing trace with hash -501080843, now seen corresponding path program 1 times [2022-07-13 18:25:37,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:37,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124461192] [2022-07-13 18:25:37,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:37,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:37,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:37,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124461192] [2022-07-13 18:25:37,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124461192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:37,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:37,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:25:37,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270101576] [2022-07-13 18:25:37,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:37,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:25:37,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:37,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:25:37,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:25:37,550 INFO L87 Difference]: Start difference. First operand 89 states and 150 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:37,634 INFO L93 Difference]: Finished difference Result 145 states and 236 transitions. [2022-07-13 18:25:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:25:37,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2022-07-13 18:25:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:37,637 INFO L225 Difference]: With dead ends: 145 [2022-07-13 18:25:37,638 INFO L226 Difference]: Without dead ends: 89 [2022-07-13 18:25:37,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:25:37,642 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 3 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:37,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 558 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-13 18:25:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-13 18:25:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3522727272727273) internal successors, (119), 88 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2022-07-13 18:25:37,656 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 33 [2022-07-13 18:25:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:37,657 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2022-07-13 18:25:37,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2022-07-13 18:25:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 18:25:37,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:37,662 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] [2022-07-13 18:25:37,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 18:25:37,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash 988628396, now seen corresponding path program 1 times [2022-07-13 18:25:37,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:37,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353709323] [2022-07-13 18:25:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:37,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:37,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:37,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353709323] [2022-07-13 18:25:37,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353709323] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:37,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:37,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:37,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289362318] [2022-07-13 18:25:37,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:37,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:37,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:37,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:37,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:37,794 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:37,815 INFO L93 Difference]: Finished difference Result 187 states and 273 transitions. [2022-07-13 18:25:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2022-07-13 18:25:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:37,817 INFO L225 Difference]: With dead ends: 187 [2022-07-13 18:25:37,817 INFO L226 Difference]: Without dead ends: 135 [2022-07-13 18:25:37,817 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 [2022-07-13 18:25:37,818 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 72 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:37,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 267 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-13 18:25:37,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-07-13 18:25:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.4318181818181819) internal successors, (189), 132 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 189 transitions. [2022-07-13 18:25:37,829 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 189 transitions. Word has length 63 [2022-07-13 18:25:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:37,830 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 189 transitions. [2022-07-13 18:25:37,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 189 transitions. [2022-07-13 18:25:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 18:25:37,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:37,831 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] [2022-07-13 18:25:37,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 18:25:37,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash 243045666, now seen corresponding path program 1 times [2022-07-13 18:25:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:37,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792391143] [2022-07-13 18:25:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:37,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:37,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:37,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792391143] [2022-07-13 18:25:37,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792391143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:37,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:37,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:37,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352691523] [2022-07-13 18:25:37,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:37,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:37,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:37,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:37,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:37,876 INFO L87 Difference]: Start difference. First operand 133 states and 189 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:37,889 INFO L93 Difference]: Finished difference Result 313 states and 473 transitions. [2022-07-13 18:25:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:37,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2022-07-13 18:25:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:37,890 INFO L225 Difference]: With dead ends: 313 [2022-07-13 18:25:37,891 INFO L226 Difference]: Without dead ends: 217 [2022-07-13 18:25:37,891 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 [2022-07-13 18:25:37,892 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 68 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:37,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 266 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-13 18:25:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2022-07-13 18:25:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 318 transitions. [2022-07-13 18:25:37,913 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 318 transitions. Word has length 63 [2022-07-13 18:25:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:37,914 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 318 transitions. [2022-07-13 18:25:37,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 318 transitions. [2022-07-13 18:25:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 18:25:37,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:37,916 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] [2022-07-13 18:25:37,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 18:25:37,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:37,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1696985192, now seen corresponding path program 1 times [2022-07-13 18:25:37,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:37,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340447191] [2022-07-13 18:25:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:37,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:37,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340447191] [2022-07-13 18:25:37,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340447191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:37,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:37,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:37,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606454006] [2022-07-13 18:25:37,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:37,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:37,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:37,996 INFO L87 Difference]: Start difference. First operand 215 states and 318 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:38,018 INFO L93 Difference]: Finished difference Result 547 states and 840 transitions. [2022-07-13 18:25:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:38,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2022-07-13 18:25:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:38,020 INFO L225 Difference]: With dead ends: 547 [2022-07-13 18:25:38,020 INFO L226 Difference]: Without dead ends: 369 [2022-07-13 18:25:38,023 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 [2022-07-13 18:25:38,026 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 64 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:38,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 265 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-07-13 18:25:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 367. [2022-07-13 18:25:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.5136612021857923) internal successors, (554), 366 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 554 transitions. [2022-07-13 18:25:38,048 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 554 transitions. Word has length 63 [2022-07-13 18:25:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:38,049 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 554 transitions. [2022-07-13 18:25:38,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 554 transitions. [2022-07-13 18:25:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 18:25:38,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:38,053 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] [2022-07-13 18:25:38,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 18:25:38,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:38,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1003697422, now seen corresponding path program 1 times [2022-07-13 18:25:38,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:38,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296119062] [2022-07-13 18:25:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:38,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:38,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:38,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296119062] [2022-07-13 18:25:38,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296119062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:38,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:38,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:38,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671770542] [2022-07-13 18:25:38,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:38,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:38,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:38,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:38,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:38,122 INFO L87 Difference]: Start difference. First operand 367 states and 554 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:38,147 INFO L93 Difference]: Finished difference Result 979 states and 1508 transitions. [2022-07-13 18:25:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:38,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2022-07-13 18:25:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:38,151 INFO L225 Difference]: With dead ends: 979 [2022-07-13 18:25:38,151 INFO L226 Difference]: Without dead ends: 649 [2022-07-13 18:25:38,152 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 [2022-07-13 18:25:38,154 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 60 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:38,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 264 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-07-13 18:25:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 647. [2022-07-13 18:25:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 1.520123839009288) internal successors, (982), 646 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 982 transitions. [2022-07-13 18:25:38,177 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 982 transitions. Word has length 63 [2022-07-13 18:25:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:38,177 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 982 transitions. [2022-07-13 18:25:38,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 982 transitions. [2022-07-13 18:25:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 18:25:38,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:38,178 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] [2022-07-13 18:25:38,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 18:25:38,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:38,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1341490564, now seen corresponding path program 1 times [2022-07-13 18:25:38,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:38,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846738380] [2022-07-13 18:25:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:38,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:38,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:38,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846738380] [2022-07-13 18:25:38,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846738380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:38,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:38,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861670456] [2022-07-13 18:25:38,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:38,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:38,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:38,219 INFO L87 Difference]: Start difference. First operand 647 states and 982 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:38,253 INFO L93 Difference]: Finished difference Result 1771 states and 2712 transitions. [2022-07-13 18:25:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2022-07-13 18:25:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:38,259 INFO L225 Difference]: With dead ends: 1771 [2022-07-13 18:25:38,259 INFO L226 Difference]: Without dead ends: 1161 [2022-07-13 18:25:38,259 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 [2022-07-13 18:25:38,261 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 56 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:38,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 263 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-07-13 18:25:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1159. [2022-07-13 18:25:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 1.5112262521588946) internal successors, (1750), 1158 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1750 transitions. [2022-07-13 18:25:38,297 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1750 transitions. Word has length 63 [2022-07-13 18:25:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:38,297 INFO L495 AbstractCegarLoop]: Abstraction has 1159 states and 1750 transitions. [2022-07-13 18:25:38,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1750 transitions. [2022-07-13 18:25:38,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 18:25:38,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:38,297 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] [2022-07-13 18:25:38,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 18:25:38,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:38,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1735491334, now seen corresponding path program 1 times [2022-07-13 18:25:38,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:38,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048347516] [2022-07-13 18:25:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:38,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:38,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048347516] [2022-07-13 18:25:38,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048347516] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:38,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:38,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:25:38,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845238892] [2022-07-13 18:25:38,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:38,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:25:38,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:38,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:25:38,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:25:38,378 INFO L87 Difference]: Start difference. First operand 1159 states and 1750 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:38,946 INFO L93 Difference]: Finished difference Result 12379 states and 18880 transitions. [2022-07-13 18:25:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 18:25:38,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2022-07-13 18:25:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:38,977 INFO L225 Difference]: With dead ends: 12379 [2022-07-13 18:25:38,977 INFO L226 Difference]: Without dead ends: 11257 [2022-07-13 18:25:38,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-13 18:25:38,981 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1317 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:38,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1317 Valid, 953 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:25:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2022-07-13 18:25:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 2279. [2022-07-13 18:25:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 1.491659350307287) internal successors, (3398), 2278 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3398 transitions. [2022-07-13 18:25:39,151 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3398 transitions. Word has length 63 [2022-07-13 18:25:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:39,151 INFO L495 AbstractCegarLoop]: Abstraction has 2279 states and 3398 transitions. [2022-07-13 18:25:39,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3398 transitions. [2022-07-13 18:25:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 18:25:39,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:39,152 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] [2022-07-13 18:25:39,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 18:25:39,152 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1519410410, now seen corresponding path program 1 times [2022-07-13 18:25:39,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:39,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720500637] [2022-07-13 18:25:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:39,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:39,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:39,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720500637] [2022-07-13 18:25:39,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720500637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:39,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:39,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:39,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105592060] [2022-07-13 18:25:39,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:39,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:39,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:39,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:39,179 INFO L87 Difference]: Start difference. First operand 2279 states and 3398 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:39,329 INFO L93 Difference]: Finished difference Result 5565 states and 8314 transitions. [2022-07-13 18:25:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:39,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2022-07-13 18:25:39,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:39,337 INFO L225 Difference]: With dead ends: 5565 [2022-07-13 18:25:39,337 INFO L226 Difference]: Without dead ends: 3323 [2022-07-13 18:25:39,339 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 [2022-07-13 18:25:39,339 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 48 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:39,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 226 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2022-07-13 18:25:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3321. [2022-07-13 18:25:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.4771084337349398) internal successors, (4904), 3320 states have internal predecessors, (4904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 4904 transitions. [2022-07-13 18:25:39,482 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 4904 transitions. Word has length 65 [2022-07-13 18:25:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:39,483 INFO L495 AbstractCegarLoop]: Abstraction has 3321 states and 4904 transitions. [2022-07-13 18:25:39,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 4904 transitions. [2022-07-13 18:25:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 18:25:39,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:39,487 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] [2022-07-13 18:25:39,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 18:25:39,488 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:39,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1585903922, now seen corresponding path program 1 times [2022-07-13 18:25:39,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:39,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4330021] [2022-07-13 18:25:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:39,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:39,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:39,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4330021] [2022-07-13 18:25:39,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4330021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:39,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:39,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:25:39,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558423613] [2022-07-13 18:25:39,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:39,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:25:39,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:25:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:25:39,611 INFO L87 Difference]: Start difference. First operand 3321 states and 4904 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:39,872 INFO L93 Difference]: Finished difference Result 6605 states and 9770 transitions. [2022-07-13 18:25:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:25:39,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2022-07-13 18:25:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:39,881 INFO L225 Difference]: With dead ends: 6605 [2022-07-13 18:25:39,881 INFO L226 Difference]: Without dead ends: 3323 [2022-07-13 18:25:39,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-13 18:25:39,884 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 337 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:39,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 425 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2022-07-13 18:25:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3321. [2022-07-13 18:25:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.4626506024096386) internal successors, (4856), 3320 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 4856 transitions. [2022-07-13 18:25:40,047 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 4856 transitions. Word has length 65 [2022-07-13 18:25:40,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:40,047 INFO L495 AbstractCegarLoop]: Abstraction has 3321 states and 4856 transitions. [2022-07-13 18:25:40,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:40,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 4856 transitions. [2022-07-13 18:25:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 18:25:40,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:40,048 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] [2022-07-13 18:25:40,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 18:25:40,049 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:40,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1503658279, now seen corresponding path program 1 times [2022-07-13 18:25:40,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:40,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170343195] [2022-07-13 18:25:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:40,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:40,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:40,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170343195] [2022-07-13 18:25:40,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170343195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:40,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:40,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 18:25:40,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492245295] [2022-07-13 18:25:40,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:40,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 18:25:40,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 18:25:40,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:25:40,114 INFO L87 Difference]: Start difference. First operand 3321 states and 4856 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:40,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:40,504 INFO L93 Difference]: Finished difference Result 6164 states and 8906 transitions. [2022-07-13 18:25:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 18:25:40,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-07-13 18:25:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:40,522 INFO L225 Difference]: With dead ends: 6164 [2022-07-13 18:25:40,522 INFO L226 Difference]: Without dead ends: 6162 [2022-07-13 18:25:40,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-13 18:25:40,525 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 628 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:40,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 580 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6162 states. [2022-07-13 18:25:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6162 to 3513. [2022-07-13 18:25:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 1.4328018223234624) internal successors, (5032), 3512 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5032 transitions. [2022-07-13 18:25:40,734 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5032 transitions. Word has length 66 [2022-07-13 18:25:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:40,734 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 5032 transitions. [2022-07-13 18:25:40,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5032 transitions. [2022-07-13 18:25:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-13 18:25:40,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:40,737 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:40,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 18:25:40,737 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash 550206538, now seen corresponding path program 1 times [2022-07-13 18:25:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:40,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833427258] [2022-07-13 18:25:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:40,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 18:25:40,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:40,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833427258] [2022-07-13 18:25:40,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833427258] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:40,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:40,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:25:40,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900096444] [2022-07-13 18:25:40,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:40,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:25:40,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:25:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:25:40,790 INFO L87 Difference]: Start difference. First operand 3513 states and 5032 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:41,742 INFO L93 Difference]: Finished difference Result 21589 states and 30958 transitions. [2022-07-13 18:25:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:25:41,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-13 18:25:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:41,778 INFO L225 Difference]: With dead ends: 21589 [2022-07-13 18:25:41,779 INFO L226 Difference]: Without dead ends: 18115 [2022-07-13 18:25:41,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:25:41,786 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 843 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:41,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 673 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:41,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18115 states. [2022-07-13 18:25:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18115 to 6985. [2022-07-13 18:25:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6985 states, 6984 states have (on average 1.4284077892325315) internal successors, (9976), 6984 states have internal predecessors, (9976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6985 states to 6985 states and 9976 transitions. [2022-07-13 18:25:42,220 INFO L78 Accepts]: Start accepts. Automaton has 6985 states and 9976 transitions. Word has length 94 [2022-07-13 18:25:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:42,221 INFO L495 AbstractCegarLoop]: Abstraction has 6985 states and 9976 transitions. [2022-07-13 18:25:42,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 6985 states and 9976 transitions. [2022-07-13 18:25:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-13 18:25:42,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:42,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:42,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 18:25:42,223 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:42,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1218576278, now seen corresponding path program 1 times [2022-07-13 18:25:42,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:42,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955781077] [2022-07-13 18:25:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:42,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 18:25:42,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:42,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955781077] [2022-07-13 18:25:42,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955781077] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:42,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:42,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:25:42,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202683407] [2022-07-13 18:25:42,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:42,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:25:42,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:25:42,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:25:42,281 INFO L87 Difference]: Start difference. First operand 6985 states and 9976 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:43,449 INFO L93 Difference]: Finished difference Result 25061 states and 35902 transitions. [2022-07-13 18:25:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:25:43,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-13 18:25:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:43,483 INFO L225 Difference]: With dead ends: 25061 [2022-07-13 18:25:43,483 INFO L226 Difference]: Without dead ends: 21587 [2022-07-13 18:25:43,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:25:43,492 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 739 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:43,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 738 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:25:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21587 states. [2022-07-13 18:25:44,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21587 to 12201. [2022-07-13 18:25:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12201 states, 12200 states have (on average 1.422295081967213) internal successors, (17352), 12200 states have internal predecessors, (17352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12201 states to 12201 states and 17352 transitions. [2022-07-13 18:25:44,228 INFO L78 Accepts]: Start accepts. Automaton has 12201 states and 17352 transitions. Word has length 94 [2022-07-13 18:25:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:44,229 INFO L495 AbstractCegarLoop]: Abstraction has 12201 states and 17352 transitions. [2022-07-13 18:25:44,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 12201 states and 17352 transitions. [2022-07-13 18:25:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-13 18:25:44,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:44,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:44,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 18:25:44,232 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:44,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:44,232 INFO L85 PathProgramCache]: Analyzing trace with hash -86936438, now seen corresponding path program 1 times [2022-07-13 18:25:44,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:44,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89325233] [2022-07-13 18:25:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:44,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:25:44,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:44,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89325233] [2022-07-13 18:25:44,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89325233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:44,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:44,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:25:44,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862357991] [2022-07-13 18:25:44,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:44,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:25:44,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:44,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:25:44,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:25:44,279 INFO L87 Difference]: Start difference. First operand 12201 states and 17352 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:45,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:45,732 INFO L93 Difference]: Finished difference Result 28533 states and 40846 transitions. [2022-07-13 18:25:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:25:45,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-13 18:25:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:45,781 INFO L225 Difference]: With dead ends: 28533 [2022-07-13 18:25:45,782 INFO L226 Difference]: Without dead ends: 25059 [2022-07-13 18:25:45,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:25:45,793 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 756 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:45,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [756 Valid, 750 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25059 states. [2022-07-13 18:25:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25059 to 15673. [2022-07-13 18:25:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15673 states, 15672 states have (on average 1.4226646248085757) internal successors, (22296), 15672 states have internal predecessors, (22296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15673 states to 15673 states and 22296 transitions. [2022-07-13 18:25:46,886 INFO L78 Accepts]: Start accepts. Automaton has 15673 states and 22296 transitions. Word has length 94 [2022-07-13 18:25:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:46,886 INFO L495 AbstractCegarLoop]: Abstraction has 15673 states and 22296 transitions. [2022-07-13 18:25:46,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 15673 states and 22296 transitions. [2022-07-13 18:25:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-13 18:25:46,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:46,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:46,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 18:25:46,891 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1322395478, now seen corresponding path program 1 times [2022-07-13 18:25:46,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:46,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233869072] [2022-07-13 18:25:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:46,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:25:46,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233869072] [2022-07-13 18:25:46,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233869072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:46,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:46,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:25:46,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943879810] [2022-07-13 18:25:46,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:46,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:25:46,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:46,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:25:46,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:25:46,945 INFO L87 Difference]: Start difference. First operand 15673 states and 22296 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:48,562 INFO L93 Difference]: Finished difference Result 32005 states and 45790 transitions. [2022-07-13 18:25:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:25:48,562 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-13 18:25:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:48,603 INFO L225 Difference]: With dead ends: 32005 [2022-07-13 18:25:48,603 INFO L226 Difference]: Without dead ends: 28531 [2022-07-13 18:25:48,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:25:48,616 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 826 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:48,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 755 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:48,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28531 states. [2022-07-13 18:25:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28531 to 19145. [2022-07-13 18:25:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19145 states, 19144 states have (on average 1.42290012536565) internal successors, (27240), 19144 states have internal predecessors, (27240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19145 states to 19145 states and 27240 transitions. [2022-07-13 18:25:49,974 INFO L78 Accepts]: Start accepts. Automaton has 19145 states and 27240 transitions. Word has length 94 [2022-07-13 18:25:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:49,974 INFO L495 AbstractCegarLoop]: Abstraction has 19145 states and 27240 transitions. [2022-07-13 18:25:49,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 19145 states and 27240 transitions. [2022-07-13 18:25:49,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-13 18:25:49,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:49,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:49,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 18:25:49,979 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1551576266, now seen corresponding path program 1 times [2022-07-13 18:25:49,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:49,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635660946] [2022-07-13 18:25:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:49,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:25:50,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:50,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635660946] [2022-07-13 18:25:50,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635660946] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:50,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:50,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:25:50,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055496140] [2022-07-13 18:25:50,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:50,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:25:50,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:50,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:25:50,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:25:50,031 INFO L87 Difference]: Start difference. First operand 19145 states and 27240 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:52,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:52,360 INFO L93 Difference]: Finished difference Result 33397 states and 47790 transitions. [2022-07-13 18:25:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:25:52,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-13 18:25:52,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:52,402 INFO L225 Difference]: With dead ends: 33397 [2022-07-13 18:25:52,402 INFO L226 Difference]: Without dead ends: 30963 [2022-07-13 18:25:52,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:25:52,413 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 823 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:52,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 698 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30963 states. [2022-07-13 18:25:53,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30963 to 21577. [2022-07-13 18:25:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 21576 states have (on average 1.4241750092695589) internal successors, (30728), 21576 states have internal predecessors, (30728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 30728 transitions. [2022-07-13 18:25:53,959 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 30728 transitions. Word has length 94 [2022-07-13 18:25:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:53,959 INFO L495 AbstractCegarLoop]: Abstraction has 21577 states and 30728 transitions. [2022-07-13 18:25:53,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 30728 transitions. [2022-07-13 18:25:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-13 18:25:53,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:53,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:53,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 18:25:53,965 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:53,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1418973216, now seen corresponding path program 1 times [2022-07-13 18:25:53,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:53,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470029914] [2022-07-13 18:25:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:53,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:54,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:54,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470029914] [2022-07-13 18:25:54,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470029914] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:25:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749682970] [2022-07-13 18:25:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:54,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:25:54,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:25:54,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:25:54,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 18:25:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 18:25:54,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:25:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:25:54,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:25:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:25:54,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749682970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:25:54,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:25:54,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 4] total 20 [2022-07-13 18:25:54,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693032771] [2022-07-13 18:25:54,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:25:54,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 18:25:54,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:54,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 18:25:54,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-13 18:25:54,726 INFO L87 Difference]: Start difference. First operand 21577 states and 30728 transitions. Second operand has 20 states, 20 states have (on average 13.45) internal successors, (269), 20 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:26:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:26:18,795 INFO L93 Difference]: Finished difference Result 255672 states and 363266 transitions. [2022-07-13 18:26:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-07-13 18:26:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 13.45) internal successors, (269), 20 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-07-13 18:26:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:26:19,258 INFO L225 Difference]: With dead ends: 255672 [2022-07-13 18:26:19,258 INFO L226 Difference]: Without dead ends: 234134 [2022-07-13 18:26:19,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10622 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4277, Invalid=20529, Unknown=0, NotChecked=0, Total=24806 [2022-07-13 18:26:19,324 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 3930 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3930 SdHoareTripleChecker+Valid, 2501 SdHoareTripleChecker+Invalid, 3079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 18:26:19,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3930 Valid, 2501 Invalid, 3079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2866 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 18:26:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234134 states. [2022-07-13 18:26:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234134 to 115701. [2022-07-13 18:26:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115701 states, 115700 states have (on average 1.4059464131374244) internal successors, (162668), 115700 states have internal predecessors, (162668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:26:31,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115701 states to 115701 states and 162668 transitions. [2022-07-13 18:26:31,202 INFO L78 Accepts]: Start accepts. Automaton has 115701 states and 162668 transitions. Word has length 95 [2022-07-13 18:26:31,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:26:31,203 INFO L495 AbstractCegarLoop]: Abstraction has 115701 states and 162668 transitions. [2022-07-13 18:26:31,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.45) internal successors, (269), 20 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:26:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 115701 states and 162668 transitions. [2022-07-13 18:26:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-13 18:26:31,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:26:31,210 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:26:31,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 18:26:31,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 18:26:31,423 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:26:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:26:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash 125066402, now seen corresponding path program 1 times [2022-07-13 18:26:31,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:26:31,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593496878] [2022-07-13 18:26:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:26:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:26:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:26:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:26:31,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:26:31,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593496878] [2022-07-13 18:26:31,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593496878] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:26:31,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715667742] [2022-07-13 18:26:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:26:31,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:26:31,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:26:31,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:26:31,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 18:26:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:26:31,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 18:26:31,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:26:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:26:32,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:26:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:26:32,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715667742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:26:32,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:26:32,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2022-07-13 18:26:32,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891617798] [2022-07-13 18:26:32,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:26:32,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 18:26:32,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:26:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 18:26:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-07-13 18:26:32,808 INFO L87 Difference]: Start difference. First operand 115701 states and 162668 transitions. Second operand has 28 states, 28 states have (on average 9.0) internal successors, (252), 27 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)