./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/array-examples/standard_sentinel.i.v+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:01:16,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:01:16,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:01:16,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:01:16,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:01:16,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:01:16,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:01:16,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:01:16,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:01:16,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:01:16,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:01:16,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:01:16,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:01:16,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:01:16,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:01:16,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:01:16,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:01:16,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:01:16,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:01:16,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:01:16,525 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:01:16,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:01:16,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:01:16,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:01:16,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:01:16,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:01:16,530 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:01:16,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:01:16,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:01:16,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:01:16,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:01:16,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:01:16,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:01:16,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:01:16,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:01:16,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:01:16,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:01:16,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:01:16,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:01:16,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:01:16,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:01:16,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:01:16,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:01:16,564 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:01:16,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:01:16,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:01:16,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:01:16,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:01:16,566 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:01:16,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:01:16,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:01:16,567 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:01:16,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:01:16,568 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:01:16,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:01:16,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:01:16,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:01:16,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:01:16,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:01:16,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:01:16,570 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:01:16,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:01:16,570 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:01:16,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:01:16,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:01:16,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:01:16,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:01:16,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:01:16,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:01:16,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:01:16,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:01:16,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:01:16,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:01:16,573 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:01:16,573 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:01:16,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:01:16,573 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2022-07-11 22:01:16,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:01:16,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:01:16,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:01:16,806 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:01:16,806 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:01:16,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-07-11 22:01:16,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0d2a3e79/51f4030a944444f6ab63c3285ba97bb5/FLAGe638010ef [2022-07-11 22:01:17,206 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:01:17,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-07-11 22:01:17,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0d2a3e79/51f4030a944444f6ab63c3285ba97bb5/FLAGe638010ef [2022-07-11 22:01:17,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0d2a3e79/51f4030a944444f6ab63c3285ba97bb5 [2022-07-11 22:01:17,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:01:17,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:01:17,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:01:17,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:01:17,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:01:17,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67f9bbb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17, skipping insertion in model container [2022-07-11 22:01:17,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:01:17,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:01:17,457 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/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-07-11 22:01:17,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:01:17,469 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:01:17,489 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/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-07-11 22:01:17,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:01:17,504 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:01:17,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17 WrapperNode [2022-07-11 22:01:17,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:01:17,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:01:17,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:01:17,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:01:17,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,534 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2022-07-11 22:01:17,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:01:17,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:01:17,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:01:17,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:01:17,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:01:17,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:01:17,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:01:17,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:01:17,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17" (1/1) ... [2022-07-11 22:01:17,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:01:17,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:01:17,585 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) [2022-07-11 22:01:17,606 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 [2022-07-11 22:01:17,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:01:17,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:01:17,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:01:17,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:01:17,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:01:17,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:01:17,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:01:17,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:01:17,668 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:01:17,669 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:01:17,831 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:01:17,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:01:17,837 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-11 22:01:17,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:01:17 BoogieIcfgContainer [2022-07-11 22:01:17,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:01:17,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:01:17,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:01:17,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:01:17,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:01:17" (1/3) ... [2022-07-11 22:01:17,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3840e187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:01:17, skipping insertion in model container [2022-07-11 22:01:17,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:01:17" (2/3) ... [2022-07-11 22:01:17,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3840e187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:01:17, skipping insertion in model container [2022-07-11 22:01:17,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:01:17" (3/3) ... [2022-07-11 22:01:17,848 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2022-07-11 22:01:17,864 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:01:17,865 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:01:17,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:01:17,931 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@3a6f0e80, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5b6e989e [2022-07-11 22:01:17,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:01:17,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-11 22:01:17,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:01:17,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:01:17,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:01:17,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:01:17,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1960333522, now seen corresponding path program 1 times [2022-07-11 22:01:17,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:01:17,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535048912] [2022-07-11 22:01:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:01:17,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:01:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:01:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:01:18,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:01:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535048912] [2022-07-11 22:01:18,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535048912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:01:18,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:01:18,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:01:18,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139939324] [2022-07-11 22:01:18,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:01:18,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:01:18,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:01:18,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:01:18,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:01:18,168 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:01:18,187 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2022-07-11 22:01:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:01:18,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-11 22:01:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:01:18,198 INFO L225 Difference]: With dead ends: 26 [2022-07-11 22:01:18,198 INFO L226 Difference]: Without dead ends: 13 [2022-07-11 22:01:18,200 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 [2022-07-11 22:01:18,204 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:01:18,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:01:18,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-11 22:01:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-07-11 22:01:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-07-11 22:01:18,230 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2022-07-11 22:01:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:01:18,230 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-07-11 22:01:18,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-07-11 22:01:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-11 22:01:18,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:01:18,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:01:18,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:01:18,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:01:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:01:18,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1620761708, now seen corresponding path program 1 times [2022-07-11 22:01:18,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:01:18,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211741028] [2022-07-11 22:01:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:01:18,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:01:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:01:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:01:18,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:01:18,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211741028] [2022-07-11 22:01:18,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211741028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:01:18,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836210595] [2022-07-11 22:01:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:01:18,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:01:18,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:01:18,285 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) [2022-07-11 22:01:18,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:01:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:01:18,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 22:01:18,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:01:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:01:18,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:01:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:01:18,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836210595] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:01:18,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:01:18,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-11 22:01:18,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73051601] [2022-07-11 22:01:18,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:01:18,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 22:01:18,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:01:18,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 22:01:18,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:01:18,403 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:18,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:01:18,428 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-07-11 22:01:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 22:01:18,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 11 [2022-07-11 22:01:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:01:18,430 INFO L225 Difference]: With dead ends: 25 [2022-07-11 22:01:18,430 INFO L226 Difference]: Without dead ends: 18 [2022-07-11 22:01:18,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:01:18,432 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:01:18,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:01:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-11 22:01:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-11 22:01:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-11 22:01:18,436 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2022-07-11 22:01:18,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:01:18,437 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-11 22:01:18,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-11 22:01:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-11 22:01:18,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:01:18,438 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:01:18,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 22:01:18,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:01:18,648 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:01:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:01:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash 47568678, now seen corresponding path program 2 times [2022-07-11 22:01:18,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:01:18,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85691639] [2022-07-11 22:01:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:01:18,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:01:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:01:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 22:01:18,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:01:18,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85691639] [2022-07-11 22:01:18,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85691639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:01:18,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:01:18,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 22:01:18,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761515697] [2022-07-11 22:01:18,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:01:18,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 22:01:18,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:01:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 22:01:18,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:01:18,775 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:18,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:01:18,803 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-07-11 22:01:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 22:01:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 17 [2022-07-11 22:01:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:01:18,805 INFO L225 Difference]: With dead ends: 23 [2022-07-11 22:01:18,805 INFO L226 Difference]: Without dead ends: 20 [2022-07-11 22:01:18,806 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 [2022-07-11 22:01:18,810 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:01:18,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:01:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-11 22:01:18,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-11 22:01:18,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-07-11 22:01:18,823 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-07-11 22:01:18,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:01:18,824 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-07-11 22:01:18,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-07-11 22:01:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-11 22:01:18,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:01:18,825 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:01:18,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 22:01:18,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:01:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:01:18,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1533228919, now seen corresponding path program 1 times [2022-07-11 22:01:18,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:01:18,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031557157] [2022-07-11 22:01:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:01:18,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:01:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:01:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 22:01:18,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:01:18,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031557157] [2022-07-11 22:01:18,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031557157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:01:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912982820] [2022-07-11 22:01:18,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:01:18,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:01:18,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:01:18,915 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) [2022-07-11 22:01:18,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:01:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:01:18,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 22:01:18,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:01:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 22:01:19,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:01:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 22:01:19,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912982820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:01:19,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:01:19,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-11 22:01:19,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137257943] [2022-07-11 22:01:19,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:01:19,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 22:01:19,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:01:19,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 22:01:19,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:01:19,090 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:01:19,134 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-11 22:01:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 22:01:19,135 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2022-07-11 22:01:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:01:19,136 INFO L225 Difference]: With dead ends: 41 [2022-07-11 22:01:19,136 INFO L226 Difference]: Without dead ends: 32 [2022-07-11 22:01:19,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:01:19,137 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:01:19,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 42 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:01:19,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-11 22:01:19,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-11 22:01:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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) [2022-07-11 22:01:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-07-11 22:01:19,143 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2022-07-11 22:01:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:01:19,143 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-07-11 22:01:19,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-07-11 22:01:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-11 22:01:19,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:01:19,144 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:01:19,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-11 22:01:19,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-11 22:01:19,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:01:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:01:19,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1092675971, now seen corresponding path program 2 times [2022-07-11 22:01:19,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:01:19,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775523680] [2022-07-11 22:01:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:01:19,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:01:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:01:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 22:01:19,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:01:19,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775523680] [2022-07-11 22:01:19,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775523680] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:01:19,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755983168] [2022-07-11 22:01:19,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:01:19,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:01:19,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:01:19,548 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:01:19,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:01:19,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:01:19,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:01:19,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 22:01:19,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:01:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 22:01:19,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:01:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 22:01:19,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755983168] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:01:19,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:01:19,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-11 22:01:19,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804731136] [2022-07-11 22:01:19,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:01:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 22:01:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:01:19,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 22:01:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-11 22:01:19,968 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:01:20,066 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-07-11 22:01:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 22:01:20,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 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 31 [2022-07-11 22:01:20,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:01:20,072 INFO L225 Difference]: With dead ends: 65 [2022-07-11 22:01:20,072 INFO L226 Difference]: Without dead ends: 56 [2022-07-11 22:01:20,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-11 22:01:20,075 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:01:20,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:01:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-11 22:01:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-11 22:01:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-07-11 22:01:20,089 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2022-07-11 22:01:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:01:20,090 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-07-11 22:01:20,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-07-11 22:01:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 22:01:20,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:01:20,091 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:01:20,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:01:20,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:01:20,291 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:01:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:01:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1116944283, now seen corresponding path program 3 times [2022-07-11 22:01:20,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:01:20,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337921372] [2022-07-11 22:01:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:01:20,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:01:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:01:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 22:01:20,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:01:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337921372] [2022-07-11 22:01:20,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337921372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:01:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883675304] [2022-07-11 22:01:20,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:01:20,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:01:20,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:01:20,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:01:20,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:01:20,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-11 22:01:20,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:01:20,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 22:01:20,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:01:20,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-11 22:01:20,858 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:01:20,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-11 22:01:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-11 22:01:20,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:01:21,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-11 22:01:21,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-07-11 22:01:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-11 22:01:21,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883675304] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:01:21,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:01:21,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 33 [2022-07-11 22:01:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47230133] [2022-07-11 22:01:21,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:01:21,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-11 22:01:21,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:01:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-11 22:01:21,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 22:01:21,086 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:01:21,317 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-07-11 22:01:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-11 22:01:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 55 [2022-07-11 22:01:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:01:21,321 INFO L225 Difference]: With dead ends: 71 [2022-07-11 22:01:21,322 INFO L226 Difference]: Without dead ends: 61 [2022-07-11 22:01:21,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=849, Unknown=0, NotChecked=0, Total=1190 [2022-07-11 22:01:21,325 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:01:21,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 90 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2022-07-11 22:01:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-11 22:01:21,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-07-11 22:01:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-07-11 22:01:21,339 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2022-07-11 22:01:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:01:21,340 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-07-11 22:01:21,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-07-11 22:01:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 22:01:21,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:01:21,344 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:01:21,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:01:21,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:01:21,556 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:01:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:01:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash 739565382, now seen corresponding path program 4 times [2022-07-11 22:01:21,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:01:21,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400529599] [2022-07-11 22:01:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:01:21,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:01:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:01:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:01:21,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:01:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400529599] [2022-07-11 22:01:21,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400529599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:01:21,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577706725] [2022-07-11 22:01:21,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:01:21,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:01:21,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:01:21,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:01:21,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:01:22,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:01:22,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:01:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-11 22:01:22,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:01:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:01:22,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:01:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:01:22,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577706725] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:01:22,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:01:22,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-07-11 22:01:22,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872181323] [2022-07-11 22:01:22,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:01:22,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-11 22:01:22,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:01:22,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-11 22:01:22,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-07-11 22:01:22,928 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:01:23,064 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2022-07-11 22:01:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-11 22:01:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 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 59 [2022-07-11 22:01:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:01:23,066 INFO L225 Difference]: With dead ends: 121 [2022-07-11 22:01:23,066 INFO L226 Difference]: Without dead ends: 110 [2022-07-11 22:01:23,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-07-11 22:01:23,068 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:01:23,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 42 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:01:23,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-11 22:01:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-07-11 22:01:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-07-11 22:01:23,077 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 59 [2022-07-11 22:01:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:01:23,077 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-07-11 22:01:23,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:01:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-07-11 22:01:23,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-11 22:01:23,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:01:23,079 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:01:23,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 22:01:23,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:01:23,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:01:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:01:23,300 INFO L85 PathProgramCache]: Analyzing trace with hash -736649004, now seen corresponding path program 5 times [2022-07-11 22:01:23,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:01:23,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766797815] [2022-07-11 22:01:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:01:23,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:01:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:01:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:01:24,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:01:24,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766797815] [2022-07-11 22:01:24,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766797815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:01:24,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331350703] [2022-07-11 22:01:24,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:01:24,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:01:24,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:01:24,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:01:24,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:02:52,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-07-11 22:02:52,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:02:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-11 22:02:52,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:02:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:02:52,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:02:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:02:55,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331350703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:02:55,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:02:55,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-07-11 22:02:55,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309880690] [2022-07-11 22:02:55,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:02:55,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-11 22:02:55,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:02:55,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-11 22:02:55,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-07-11 22:02:55,030 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:02:55,292 INFO L93 Difference]: Finished difference Result 221 states and 272 transitions. [2022-07-11 22:02:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-11 22:02:55,293 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 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 109 [2022-07-11 22:02:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:02:55,294 INFO L225 Difference]: With dead ends: 221 [2022-07-11 22:02:55,294 INFO L226 Difference]: Without dead ends: 210 [2022-07-11 22:02:55,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-07-11 22:02:55,297 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:02:55,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 50 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:02:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-11 22:02:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-07-11 22:02:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2022-07-11 22:02:55,309 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 109 [2022-07-11 22:02:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:02:55,310 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2022-07-11 22:02:55,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2022-07-11 22:02:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-07-11 22:02:55,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:02:55,313 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:02:55,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-11 22:02:55,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:55,523 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:02:55,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:02:55,524 INFO L85 PathProgramCache]: Analyzing trace with hash 929351024, now seen corresponding path program 6 times [2022-07-11 22:02:55,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:02:55,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879522769] [2022-07-11 22:02:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:02:55,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:02:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:02:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:02:58,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:02:58,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879522769] [2022-07-11 22:02:58,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879522769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:02:58,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720169252] [2022-07-11 22:02:58,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:02:58,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:58,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:02:58,811 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:02:58,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:02:58,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-11 22:02:58,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:02:58,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 22:02:58,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:02:59,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-11 22:02:59,227 INFO L356 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2022-07-11 22:02:59,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2022-07-11 22:02:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-07-11 22:02:59,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:02:59,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-07-11 22:02:59,831 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:02:59,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2022-07-11 22:02:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2022-07-11 22:02:59,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720169252] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:02:59,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:02:59,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 9, 9] total 113 [2022-07-11 22:02:59,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149119058] [2022-07-11 22:02:59,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:02:59,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-07-11 22:02:59,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:02:59,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-07-11 22:02:59,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5097, Invalid=7559, Unknown=0, NotChecked=0, Total=12656 [2022-07-11 22:02:59,892 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 113 states, 113 states have (on average 2.0) internal successors, (226), 113 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:03:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:03:00,532 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2022-07-11 22:03:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-07-11 22:03:00,533 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 113 states have internal predecessors, (226), 0 states have call successors, (0), 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 209 [2022-07-11 22:03:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:03:00,534 INFO L225 Difference]: With dead ends: 230 [2022-07-11 22:03:00,534 INFO L226 Difference]: Without dead ends: 217 [2022-07-11 22:03:00,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 404 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5153, Invalid=8889, Unknown=0, NotChecked=0, Total=14042 [2022-07-11 22:03:00,537 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 116 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:03:00,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 45 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-07-11 22:03:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-11 22:03:00,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-07-11 22:03:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:03:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2022-07-11 22:03:00,559 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 209 [2022-07-11 22:03:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:03:00,560 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2022-07-11 22:03:00,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 113 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:03:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2022-07-11 22:03:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-11 22:03:00,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:03:00,566 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:03:00,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:03:00,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:03:00,772 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:03:00,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:03:00,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1504176460, now seen corresponding path program 7 times [2022-07-11 22:03:00,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:03:00,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365646411] [2022-07-11 22:03:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:03:00,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:03:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:03:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 22:03:04,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:03:04,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365646411] [2022-07-11 22:03:04,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365646411] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:03:04,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440063636] [2022-07-11 22:03:04,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:03:04,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:03:04,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:03:04,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:03:04,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:03:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:03:04,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-11 22:03:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:03:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 22:03:04,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:03:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9821 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 22:03:14,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440063636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:03:14,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:03:14,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2022-07-11 22:03:14,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561854292] [2022-07-11 22:03:14,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:03:14,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-07-11 22:03:14,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:03:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-07-11 22:03:14,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-07-11 22:03:14,194 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:03:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:03:14,988 INFO L93 Difference]: Finished difference Result 433 states and 535 transitions. [2022-07-11 22:03:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-07-11 22:03:14,992 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 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 215 [2022-07-11 22:03:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:03:14,993 INFO L225 Difference]: With dead ends: 433 [2022-07-11 22:03:14,993 INFO L226 Difference]: Without dead ends: 418 [2022-07-11 22:03:14,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-07-11 22:03:14,996 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 300 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:03:14,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 50 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 22:03:14,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-07-11 22:03:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2022-07-11 22:03:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.0047961630695443) internal successors, (419), 417 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:03:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 419 transitions. [2022-07-11 22:03:15,020 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 419 transitions. Word has length 215 [2022-07-11 22:03:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:03:15,020 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 419 transitions. [2022-07-11 22:03:15,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:03:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 419 transitions. [2022-07-11 22:03:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-07-11 22:03:15,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:03:15,027 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:03:15,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-11 22:03:15,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-11 22:03:15,244 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:03:15,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:03:15,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2094532266, now seen corresponding path program 8 times [2022-07-11 22:03:15,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:03:15,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458144094] [2022-07-11 22:03:15,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:03:15,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:03:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:03:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 22:03:27,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:03:27,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458144094] [2022-07-11 22:03:27,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458144094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:03:27,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320319148] [2022-07-11 22:03:27,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:03:27,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:03:27,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:03:27,935 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:03:27,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 22:03:28,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:03:28,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:03:28,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 202 conjunts are in the unsatisfiable core [2022-07-11 22:03:28,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:03:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 22:03:28,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:04:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 40020 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 22:04:03,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320319148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:04:03,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:04:03,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2022-07-11 22:04:03,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021615061] [2022-07-11 22:04:03,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:04:03,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-07-11 22:04:03,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:04:03,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-07-11 22:04:03,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2022-07-11 22:04:03,750 INFO L87 Difference]: Start difference. First operand 418 states and 419 transitions. Second operand has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:04:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:04:07,402 INFO L93 Difference]: Finished difference Result 837 states and 1040 transitions. [2022-07-11 22:04:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-07-11 22:04:07,404 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 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 417 [2022-07-11 22:04:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:04:07,408 INFO L225 Difference]: With dead ends: 837 [2022-07-11 22:04:07,408 INFO L226 Difference]: Without dead ends: 822 [2022-07-11 22:04:07,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2022-07-11 22:04:07,420 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 603 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 22:04:07,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 66 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 22:04:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-07-11 22:04:07,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 822. [2022-07-11 22:04:07,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.002436053593179) internal successors, (823), 821 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:04:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 823 transitions. [2022-07-11 22:04:07,443 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 823 transitions. Word has length 417 [2022-07-11 22:04:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:04:07,443 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 823 transitions. [2022-07-11 22:04:07,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:04:07,445 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 823 transitions. [2022-07-11 22:04:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2022-07-11 22:04:07,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:04:07,464 INFO L195 NwaCegarLoop]: trace histogram [402, 402, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:04:07,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:04:07,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:04:07,691 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:04:07,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:04:07,691 INFO L85 PathProgramCache]: Analyzing trace with hash 482288662, now seen corresponding path program 9 times [2022-07-11 22:04:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:04:07,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231614265] [2022-07-11 22:04:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:04:07,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:04:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:04:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 22:04:55,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:04:55,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231614265] [2022-07-11 22:04:55,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231614265] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:04:55,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459517107] [2022-07-11 22:04:55,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:04:55,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:04:55,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:04:55,104 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:04:55,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:04:55,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-11 22:04:55,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:04:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-11 22:04:55,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:04:55,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-11 22:04:57,204 INFO L356 Elim1Store]: treesize reduction 52, result has 62.0 percent of original size [2022-07-11 22:04:57,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 103 [2022-07-11 22:04:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-07-11 22:04:57,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:05:00,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-07-11 22:05:00,218 INFO L356 Elim1Store]: treesize reduction 26, result has 67.1 percent of original size [2022-07-11 22:05:00,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 149 [2022-07-11 22:05:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 161624 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2022-07-11 22:05:00,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459517107] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:05:00,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:05:00,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 13, 13] total 425 [2022-07-11 22:05:00,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851076922] [2022-07-11 22:05:00,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:05:00,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 425 states [2022-07-11 22:05:00,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:05:00,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 425 interpolants. [2022-07-11 22:05:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81923, Invalid=98277, Unknown=0, NotChecked=0, Total=180200 [2022-07-11 22:05:00,460 INFO L87 Difference]: Start difference. First operand 822 states and 823 transitions. Second operand has 425 states, 425 states have (on average 1.9811764705882353) internal successors, (842), 425 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:05:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:05:06,850 INFO L93 Difference]: Finished difference Result 849 states and 855 transitions. [2022-07-11 22:05:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 422 states. [2022-07-11 22:05:06,851 INFO L78 Accepts]: Start accepts. Automaton has has 425 states, 425 states have (on average 1.9811764705882353) internal successors, (842), 425 states have internal predecessors, (842), 0 states have call successors, (0), 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 821 [2022-07-11 22:05:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:05:06,856 INFO L225 Difference]: With dead ends: 849 [2022-07-11 22:05:06,856 INFO L226 Difference]: Without dead ends: 833 [2022-07-11 22:05:06,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2052 GetRequests, 1620 SyntacticMatches, 2 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9115 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=82003, Invalid=104189, Unknown=0, NotChecked=0, Total=186192 [2022-07-11 22:05:06,868 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 414 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 22:05:06,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 76 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 961 Invalid, 0 Unknown, 148 Unchecked, 0.8s Time] [2022-07-11 22:05:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-07-11 22:05:06,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 832. [2022-07-11 22:05:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 1.0024067388688327) internal successors, (833), 831 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:05:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 833 transitions. [2022-07-11 22:05:06,890 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 833 transitions. Word has length 821 [2022-07-11 22:05:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:05:06,892 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 833 transitions. [2022-07-11 22:05:06,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 425 states, 425 states have (on average 1.9811764705882353) internal successors, (842), 425 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:05:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 833 transitions. [2022-07-11 22:05:06,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2022-07-11 22:05:06,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:05:06,899 INFO L195 NwaCegarLoop]: trace histogram [403, 403, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:05:06,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-11 22:05:07,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-11 22:05:07,100 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:05:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:05:07,101 INFO L85 PathProgramCache]: Analyzing trace with hash 838162272, now seen corresponding path program 10 times [2022-07-11 22:05:07,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:05:07,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829984406] [2022-07-11 22:05:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:05:07,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:05:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat