./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const3.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 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:31:48,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:31:48,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:31:48,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:31:48,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:31:48,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:31:48,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:31:48,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:31:48,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:31:48,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:31:48,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:31:48,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:31:48,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:31:48,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:31:48,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:31:48,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:31:48,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:31:48,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:31:48,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:31:48,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:31:48,354 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:31:48,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:31:48,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:31:48,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:31:48,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:31:48,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:31:48,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:31:48,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:31:48,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:31:48,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:31:48,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:31:48,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:31:48,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:31:48,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:31:48,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:31:48,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:31:48,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:31:48,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:31:48,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:31:48,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:31:48,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:31:48,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:31:48,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:31:48,389 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:31:48,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:31:48,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:31:48,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:31:48,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:31:48,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:31:48,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:31:48,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:31:48,391 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:31:48,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:31:48,392 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:31:48,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:31:48,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:31:48,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:31:48,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:31:48,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:31:48,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:31:48,393 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:31:48,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:31:48,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:31:48,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:31:48,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:31:48,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:31:48,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:31:48,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:31:48,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:31:48,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:31:48,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:31:48,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:31:48,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:31:48,395 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:31:48,396 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:31:48,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:31:48,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 [2022-07-13 10:31:48,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:31:48,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:31:48,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:31:48,595 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:31:48,595 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:31:48,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const3.c [2022-07-13 10:31:48,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9388a9021/10bb3b6e400d4fccb5fda216b8030a77/FLAG30bbb7160 [2022-07-13 10:31:48,920 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:31:48,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const3.c [2022-07-13 10:31:48,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9388a9021/10bb3b6e400d4fccb5fda216b8030a77/FLAG30bbb7160 [2022-07-13 10:31:49,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9388a9021/10bb3b6e400d4fccb5fda216b8030a77 [2022-07-13 10:31:49,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:31:49,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:31:49,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:31:49,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:31:49,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:31:49,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@365744c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49, skipping insertion in model container [2022-07-13 10:31:49,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:31:49,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:31:49,482 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-crafted/zero_sum_const3.c[406,419] [2022-07-13 10:31:49,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:31:49,523 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:31:49,533 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-crafted/zero_sum_const3.c[406,419] [2022-07-13 10:31:49,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:31:49,562 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:31:49,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49 WrapperNode [2022-07-13 10:31:49,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:31:49,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:31:49,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:31:49,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:31:49,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,596 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 104 [2022-07-13 10:31:49,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:31:49,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:31:49,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:31:49,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:31:49,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:31:49,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:31:49,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:31:49,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:31:49,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49" (1/1) ... [2022-07-13 10:31:49,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:31:49,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:31:49,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 10:31:49,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 10:31:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:31:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:31:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:31:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 10:31:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:31:49,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:31:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:31:49,730 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:31:49,731 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:31:49,906 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:31:49,910 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:31:49,910 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-07-13 10:31:49,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:31:49 BoogieIcfgContainer [2022-07-13 10:31:49,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:31:49,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:31:49,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:31:49,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:31:49,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:31:49" (1/3) ... [2022-07-13 10:31:49,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734a85db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:31:49, skipping insertion in model container [2022-07-13 10:31:49,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:31:49" (2/3) ... [2022-07-13 10:31:49,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734a85db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:31:49, skipping insertion in model container [2022-07-13 10:31:49,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:31:49" (3/3) ... [2022-07-13 10:31:49,917 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.c [2022-07-13 10:31:49,928 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:31:49,928 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:31:49,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:31:49,961 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@7d942e5d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@10e8cffe [2022-07-13 10:31:49,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:31:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:31:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 10:31:49,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:31:49,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:31:49,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:31:49,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:31:49,975 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2022-07-13 10:31:49,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:31:49,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055590104] [2022-07-13 10:31:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:31:49,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:31:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:31:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:31:50,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:31:50,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055590104] [2022-07-13 10:31:50,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055590104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:31:50,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:31:50,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 10:31:50,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284091185] [2022-07-13 10:31:50,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:31:50,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 10:31:50,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:31:50,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 10:31:50,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:31:50,123 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2022-07-13 10:31:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:31:50,137 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2022-07-13 10:31:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 10:31:50,139 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) Word has length 19 [2022-07-13 10:31:50,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:31:50,143 INFO L225 Difference]: With dead ends: 59 [2022-07-13 10:31:50,143 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 10:31:50,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:31:50,164 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:31:50,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:31:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 10:31:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-13 10:31:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:31:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-13 10:31:50,188 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2022-07-13 10:31:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:31:50,188 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-13 10:31:50,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2022-07-13 10:31:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-13 10:31:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 10:31:50,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:31:50,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:31:50,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:31:50,190 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:31:50,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:31:50,191 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2022-07-13 10:31:50,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:31:50,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924237065] [2022-07-13 10:31:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:31:50,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:31:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:31:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:31:50,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:31:50,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924237065] [2022-07-13 10:31:50,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924237065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:31:50,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:31:50,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 10:31:50,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597238158] [2022-07-13 10:31:50,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:31:50,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:31:50,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:31:50,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:31:50,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:31:50,283 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2022-07-13 10:31:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:31:50,328 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-07-13 10:31:50,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:31:50,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) Word has length 19 [2022-07-13 10:31:50,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:31:50,329 INFO L225 Difference]: With dead ends: 51 [2022-07-13 10:31:50,329 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 10:31:50,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:31:50,330 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:31:50,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:31:50,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 10:31:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-13 10:31:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:31:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-13 10:31:50,334 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2022-07-13 10:31:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:31:50,334 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-13 10:31:50,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2022-07-13 10:31:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-13 10:31:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 10:31:50,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:31:50,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:31:50,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 10:31:50,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:31:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:31:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2022-07-13 10:31:50,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:31:50,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166344341] [2022-07-13 10:31:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:31:50,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:31:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:31:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:31:50,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:31:50,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166344341] [2022-07-13 10:31:50,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166344341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:31:50,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:31:50,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:31:50,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755594628] [2022-07-13 10:31:50,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:31:50,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:31:50,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:31:50,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:31:50,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:31:50,405 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2022-07-13 10:31:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:31:50,485 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2022-07-13 10:31:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:31:50,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) Word has length 21 [2022-07-13 10:31:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:31:50,487 INFO L225 Difference]: With dead ends: 60 [2022-07-13 10:31:50,487 INFO L226 Difference]: Without dead ends: 41 [2022-07-13 10:31:50,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:31:50,490 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:31:50,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 15 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:31:50,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-13 10:31:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-07-13 10:31:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:31:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-07-13 10:31:50,495 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2022-07-13 10:31:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:31:50,495 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-07-13 10:31:50,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2022-07-13 10:31:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-07-13 10:31:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 10:31:50,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:31:50,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:31:50,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 10:31:50,497 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:31:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:31:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2022-07-13 10:31:50,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:31:50,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923083318] [2022-07-13 10:31:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:31:50,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:31:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:31:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 10:31:50,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:31:50,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923083318] [2022-07-13 10:31:50,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923083318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:31:50,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269046589] [2022-07-13 10:31:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:31:50,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:31:50,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:31:50,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:31:50,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:31:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:31:50,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:31:50,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:31:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 10:31:50,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:31:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 10:31:50,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269046589] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:31:50,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:31:50,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 10:31:50,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081778365] [2022-07-13 10:31:50,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:31:50,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 10:31:50,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:31:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 10:31:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:31:50,652 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:31:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:31:50,708 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-07-13 10:31:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 10:31:50,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-13 10:31:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:31:50,709 INFO L225 Difference]: With dead ends: 65 [2022-07-13 10:31:50,709 INFO L226 Difference]: Without dead ends: 37 [2022-07-13 10:31:50,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:31:50,710 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:31:50,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:31:50,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-13 10:31:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-07-13 10:31:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:31:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-13 10:31:50,734 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2022-07-13 10:31:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:31:50,735 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-13 10:31:50,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:31:50,735 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-13 10:31:50,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 10:31:50,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:31:50,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:31:50,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:31:50,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:31:50,944 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:31:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:31:50,945 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2022-07-13 10:31:50,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:31:50,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803903287] [2022-07-13 10:31:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:31:50,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:31:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:31:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:31:51,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:31:51,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803903287] [2022-07-13 10:31:51,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803903287] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:31:51,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833750802] [2022-07-13 10:31:51,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:31:51,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:31:51,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:31:51,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:31:51,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:31:51,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:31:51,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:31:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:31:51,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:31:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:31:51,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:31:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:31:51,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833750802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:31:51,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:31:51,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-13 10:31:51,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046869871] [2022-07-13 10:31:51,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:31:51,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 10:31:51,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:31:51,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 10:31:51,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-13 10:31:51,136 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:31:51,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:31:51,212 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-07-13 10:31:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 10:31:51,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 35 [2022-07-13 10:31:51,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:31:51,213 INFO L225 Difference]: With dead ends: 79 [2022-07-13 10:31:51,213 INFO L226 Difference]: Without dead ends: 55 [2022-07-13 10:31:51,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:31:51,214 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:31:51,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 18 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:31:51,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-13 10:31:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2022-07-13 10:31:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:31:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-07-13 10:31:51,218 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2022-07-13 10:31:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:31:51,218 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-07-13 10:31:51,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:31:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-07-13 10:31:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 10:31:51,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:31:51,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:31:51,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:31:51,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:31:51,436 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:31:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:31:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2022-07-13 10:31:51,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:31:51,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123874546] [2022-07-13 10:31:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:31:51,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:31:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:31:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:31:52,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:31:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123874546] [2022-07-13 10:31:52,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123874546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:31:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787133102] [2022-07-13 10:31:52,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:31:52,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:31:52,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:31:52,304 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) [2022-07-13 10:31:52,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:31:52,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 10:31:52,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:31:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-13 10:31:52,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:31:53,357 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:31:53,358 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 17 treesize of output 18 [2022-07-13 10:31:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:31:53,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:31:58,973 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:31:58,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 93 [2022-07-13 10:31:59,302 INFO L356 Elim1Store]: treesize reduction 40, result has 52.9 percent of original size [2022-07-13 10:31:59,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 54 [2022-07-13 10:31:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:31:59,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787133102] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:31:59,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:31:59,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 26] total 58 [2022-07-13 10:31:59,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417308045] [2022-07-13 10:31:59,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:31:59,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-13 10:31:59,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:31:59,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-13 10:31:59,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2951, Unknown=1, NotChecked=0, Total=3306 [2022-07-13 10:31:59,946 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:32:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:32:01,291 INFO L93 Difference]: Finished difference Result 132 states and 152 transitions. [2022-07-13 10:32:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-13 10:32:01,292 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 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 47 [2022-07-13 10:32:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:32:01,294 INFO L225 Difference]: With dead ends: 132 [2022-07-13 10:32:01,294 INFO L226 Difference]: Without dead ends: 126 [2022-07-13 10:32:01,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 51 SyntacticMatches, 27 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=788, Invalid=6183, Unknown=1, NotChecked=0, Total=6972 [2022-07-13 10:32:01,296 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 599 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:32:01,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 93 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 328 Invalid, 0 Unknown, 599 Unchecked, 0.2s Time] [2022-07-13 10:32:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-13 10:32:01,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 87. [2022-07-13 10:32:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 86 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:32:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2022-07-13 10:32:01,306 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 47 [2022-07-13 10:32:01,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:32:01,306 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2022-07-13 10:32:01,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:32:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2022-07-13 10:32:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-13 10:32:01,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:32:01,307 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:32:01,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 10:32:01,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:32:01,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:32:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:32:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2022-07-13 10:32:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:32:01,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440940403] [2022-07-13 10:32:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:32:01,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:32:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:32:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 10:32:01,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:32:01,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440940403] [2022-07-13 10:32:01,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440940403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:32:01,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292666825] [2022-07-13 10:32:01,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:32:01,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:32:01,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:32:01,596 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) [2022-07-13 10:32:01,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:32:01,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:32:01,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:32:01,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:32:01,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:32:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 10:32:01,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:32:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 10:32:01,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292666825] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:32:01,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:32:01,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-13 10:32:01,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952974266] [2022-07-13 10:32:01,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:32:01,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:32:01,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:32:01,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:32:01,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:32:01,747 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:32:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:32:01,935 INFO L93 Difference]: Finished difference Result 193 states and 222 transitions. [2022-07-13 10:32:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 10:32:01,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 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 49 [2022-07-13 10:32:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:32:01,936 INFO L225 Difference]: With dead ends: 193 [2022-07-13 10:32:01,936 INFO L226 Difference]: Without dead ends: 120 [2022-07-13 10:32:01,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-13 10:32:01,937 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 161 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:32:01,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 32 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:32:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-13 10:32:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2022-07-13 10:32:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 99 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:32:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2022-07-13 10:32:01,944 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 49 [2022-07-13 10:32:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:32:01,945 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2022-07-13 10:32:01,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:32:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2022-07-13 10:32:01,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 10:32:01,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:32:01,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:32:01,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:32:02,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:32:02,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:32:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:32:02,147 INFO L85 PathProgramCache]: Analyzing trace with hash -925733540, now seen corresponding path program 5 times [2022-07-13 10:32:02,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:32:02,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961778274] [2022-07-13 10:32:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:32:02,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:32:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:32:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 10:32:02,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:32:02,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961778274] [2022-07-13 10:32:02,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961778274] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:32:02,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053141888] [2022-07-13 10:32:02,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:32:02,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:32:02,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:32:02,195 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) [2022-07-13 10:32:02,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:32:02,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 10:32:02,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:32:02,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:32:02,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:32:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 10:32:02,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:32:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 10:32:02,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053141888] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:32:02,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:32:02,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-13 10:32:02,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152443268] [2022-07-13 10:32:02,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:32:02,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:32:02,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:32:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:32:02,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:32:02,349 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:32:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:32:02,531 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2022-07-13 10:32:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 10:32:02,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 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 51 [2022-07-13 10:32:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:32:02,532 INFO L225 Difference]: With dead ends: 112 [2022-07-13 10:32:02,532 INFO L226 Difference]: Without dead ends: 78 [2022-07-13 10:32:02,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:32:02,533 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:32:02,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 23 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:32:02,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-13 10:32:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2022-07-13 10:32:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:32:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-07-13 10:32:02,538 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2022-07-13 10:32:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:32:02,538 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-07-13 10:32:02,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:32:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-07-13 10:32:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 10:32:02,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:32:02,539 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:32:02,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 10:32:02,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:32:02,749 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:32:02,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:32:02,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2022-07-13 10:32:02,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:32:02,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260357034] [2022-07-13 10:32:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:32:02,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:32:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:32:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:32:04,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:32:04,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260357034] [2022-07-13 10:32:04,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260357034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:32:04,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054242545] [2022-07-13 10:32:04,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:32:04,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:32:04,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:32:04,940 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) [2022-07-13 10:32:04,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:32:04,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 10:32:04,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:32:04,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-13 10:32:04,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:32:07,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:32:07,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:32:07,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:32:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:32:07,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:32:07,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:32:07,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:32:07,957 INFO L356 Elim1Store]: treesize reduction 6, result has 68.4 percent of original size [2022-07-13 10:32:07,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 28 [2022-07-13 10:32:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:32:08,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:33:12,593 INFO L356 Elim1Store]: treesize reduction 185, result has 55.3 percent of original size [2022-07-13 10:33:12,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 245 [2022-07-13 10:33:15,244 INFO L356 Elim1Store]: treesize reduction 393, result has 5.1 percent of original size [2022-07-13 10:33:15,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 38 [2022-07-13 10:33:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:33:15,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054242545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:33:15,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:33:15,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 40] total 121 [2022-07-13 10:33:15,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542171988] [2022-07-13 10:33:15,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:33:15,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-07-13 10:33:15,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:33:15,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-07-13 10:33:15,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=13571, Unknown=18, NotChecked=0, Total=14520 [2022-07-13 10:33:15,757 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 121 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 121 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:33:21,422 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2022-07-13 10:33:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-13 10:33:21,422 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 121 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-13 10:33:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:33:21,423 INFO L225 Difference]: With dead ends: 114 [2022-07-13 10:33:21,423 INFO L226 Difference]: Without dead ends: 110 [2022-07-13 10:33:21,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 43 SyntacticMatches, 13 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8988 ImplicationChecksByTransitivity, 72.6s TimeCoverageRelationStatistics Valid=1930, Invalid=26782, Unknown=18, NotChecked=0, Total=28730 [2022-07-13 10:33:21,428 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1382 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 10:33:21,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 160 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1347 Invalid, 0 Unknown, 1382 Unchecked, 0.8s Time] [2022-07-13 10:33:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-13 10:33:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2022-07-13 10:33:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2022-07-13 10:33:21,439 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 61 [2022-07-13 10:33:21,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:33:21,439 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2022-07-13 10:33:21,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 121 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2022-07-13 10:33:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 10:33:21,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:33:21,440 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:33:21,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:33:21,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:33:21,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:33:21,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:33:21,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2022-07-13 10:33:21,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:33:21,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354450839] [2022-07-13 10:33:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:33:21,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:33:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:33:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:33:21,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:33:21,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354450839] [2022-07-13 10:33:21,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354450839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:33:21,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853757094] [2022-07-13 10:33:21,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:33:21,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:33:21,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:33:21,711 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) [2022-07-13 10:33:21,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:33:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:33:21,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 10:33:21,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:33:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:33:21,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:33:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:33:21,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853757094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:33:21,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:33:21,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-13 10:33:21,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42637382] [2022-07-13 10:33:21,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:33:21,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 10:33:21,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:33:21,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 10:33:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-13 10:33:21,916 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2022-07-13 10:33:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:33:22,190 INFO L93 Difference]: Finished difference Result 221 states and 246 transitions. [2022-07-13 10:33:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 10:33:22,190 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) Word has length 63 [2022-07-13 10:33:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:33:22,191 INFO L225 Difference]: With dead ends: 221 [2022-07-13 10:33:22,191 INFO L226 Difference]: Without dead ends: 126 [2022-07-13 10:33:22,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-13 10:33:22,192 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:33:22,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 42 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:33:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-13 10:33:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2022-07-13 10:33:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1047619047619048) internal successors, (116), 105 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2022-07-13 10:33:22,199 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 63 [2022-07-13 10:33:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:33:22,200 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2022-07-13 10:33:22,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2022-07-13 10:33:22,200 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2022-07-13 10:33:22,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 10:33:22,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:33:22,201 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:33:22,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:33:22,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:33:22,410 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:33:22,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:33:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash 156775434, now seen corresponding path program 8 times [2022-07-13 10:33:22,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:33:22,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933868260] [2022-07-13 10:33:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:33:22,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:33:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:33:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-13 10:33:22,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:33:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933868260] [2022-07-13 10:33:22,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933868260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:33:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098641289] [2022-07-13 10:33:22,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:33:22,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:33:22,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:33:22,471 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) [2022-07-13 10:33:22,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:33:22,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:33:22,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:33:22,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 10:33:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:33:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-13 10:33:22,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:33:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-13 10:33:22,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098641289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:33:22,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:33:22,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-13 10:33:22,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502766872] [2022-07-13 10:33:22,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:33:22,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 10:33:22,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:33:22,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 10:33:22,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-13 10:33:22,650 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2022-07-13 10:33:22,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:33:22,910 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2022-07-13 10:33:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 10:33:22,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) Word has length 65 [2022-07-13 10:33:22,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:33:22,911 INFO L225 Difference]: With dead ends: 118 [2022-07-13 10:33:22,911 INFO L226 Difference]: Without dead ends: 82 [2022-07-13 10:33:22,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-07-13 10:33:22,912 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 149 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:33:22,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 20 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:33:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-13 10:33:22,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-07-13 10:33:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-07-13 10:33:22,917 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2022-07-13 10:33:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:33:22,917 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-07-13 10:33:22,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2022-07-13 10:33:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-07-13 10:33:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-13 10:33:22,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:33:22,918 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:33:22,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:33:23,118 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,SelfDestructingSolverStorable10 [2022-07-13 10:33:23,118 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:33:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:33:23,119 INFO L85 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2022-07-13 10:33:23,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:33:23,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808275344] [2022-07-13 10:33:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:33:23,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:33:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:33:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:33:27,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:33:27,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808275344] [2022-07-13 10:33:27,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808275344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:33:27,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51188352] [2022-07-13 10:33:27,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:33:27,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:33:27,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:33:27,116 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) [2022-07-13 10:33:27,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:33:27,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 10:33:27,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:33:27,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-13 10:33:27,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:33:27,256 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 [2022-07-13 10:33:34,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:33:34,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:33:34,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:33:34,445 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:33:34,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 53 [2022-07-13 10:33:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 103 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 10:33:34,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:33:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:33:40,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51188352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:33:40,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:33:40,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 26, 21] total 103 [2022-07-13 10:33:40,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577887391] [2022-07-13 10:33:40,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:33:40,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-07-13 10:33:40,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:33:40,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-07-13 10:33:40,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=9978, Unknown=1, NotChecked=0, Total=10506 [2022-07-13 10:33:40,456 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:51,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:33:51,437 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2022-07-13 10:33:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-13 10:33:51,438 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 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 75 [2022-07-13 10:33:51,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:33:51,439 INFO L225 Difference]: With dead ends: 146 [2022-07-13 10:33:51,439 INFO L226 Difference]: Without dead ends: 142 [2022-07-13 10:33:51,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 86 SyntacticMatches, 29 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8928 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=1834, Invalid=32205, Unknown=1, NotChecked=0, Total=34040 [2022-07-13 10:33:51,441 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 10:33:51,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 163 Invalid, 2542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1388 Invalid, 0 Unknown, 891 Unchecked, 0.8s Time] [2022-07-13 10:33:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-13 10:33:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2022-07-13 10:33:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1) internal successors, (121), 110 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2022-07-13 10:33:51,451 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 75 [2022-07-13 10:33:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:33:51,451 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2022-07-13 10:33:51,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2022-07-13 10:33:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 10:33:51,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:33:51,452 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:33:51,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:33:51,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:33:51,653 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:33:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:33:51,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1706175702, now seen corresponding path program 10 times [2022-07-13 10:33:51,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:33:51,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985097515] [2022-07-13 10:33:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:33:51,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:33:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:33:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-13 10:33:51,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:33:51,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985097515] [2022-07-13 10:33:51,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985097515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:33:51,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113754191] [2022-07-13 10:33:51,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:33:51,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:33:51,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:33:51,732 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) [2022-07-13 10:33:51,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:33:51,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:33:51,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:33:51,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 10:33:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:33:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-13 10:33:51,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:33:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-13 10:33:51,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113754191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:33:51,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:33:51,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-13 10:33:51,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610902712] [2022-07-13 10:33:51,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:33:51,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:33:51,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:33:51,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:33:51,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:33:51,984 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:33:52,270 INFO L93 Difference]: Finished difference Result 290 states and 318 transitions. [2022-07-13 10:33:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 10:33:52,271 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-13 10:33:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:33:52,272 INFO L225 Difference]: With dead ends: 290 [2022-07-13 10:33:52,272 INFO L226 Difference]: Without dead ends: 137 [2022-07-13 10:33:52,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-13 10:33:52,274 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 213 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:33:52,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 41 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:33:52,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-13 10:33:52,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2022-07-13 10:33:52,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 117 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2022-07-13 10:33:52,284 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 77 [2022-07-13 10:33:52,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:33:52,284 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2022-07-13 10:33:52,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:52,284 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2022-07-13 10:33:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-13 10:33:52,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:33:52,285 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:33:52,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:33:52,489 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,SelfDestructingSolverStorable12 [2022-07-13 10:33:52,490 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:33:52,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:33:52,490 INFO L85 PathProgramCache]: Analyzing trace with hash 437686490, now seen corresponding path program 11 times [2022-07-13 10:33:52,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:33:52,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033782943] [2022-07-13 10:33:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:33:52,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:33:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:33:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-13 10:33:52,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:33:52,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033782943] [2022-07-13 10:33:52,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033782943] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:33:52,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278370296] [2022-07-13 10:33:52,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:33:52,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:33:52,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:33:52,594 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:33:52,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:33:52,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-13 10:33:52,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:33:52,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 10:33:52,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:33:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-13 10:33:52,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:33:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-13 10:33:52,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278370296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:33:52,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:33:52,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-13 10:33:52,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030397703] [2022-07-13 10:33:52,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:33:52,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:33:52,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:33:52,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:33:52,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:33:52,879 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:33:53,160 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2022-07-13 10:33:53,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 10:33:53,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-13 10:33:53,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:33:53,161 INFO L225 Difference]: With dead ends: 130 [2022-07-13 10:33:53,161 INFO L226 Difference]: Without dead ends: 96 [2022-07-13 10:33:53,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-07-13 10:33:53,162 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 170 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:33:53,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 23 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:33:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-13 10:33:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2022-07-13 10:33:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2022-07-13 10:33:53,169 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 81 [2022-07-13 10:33:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:33:53,170 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2022-07-13 10:33:53,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:33:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2022-07-13 10:33:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-13 10:33:53,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:33:53,171 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:33:53,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:33:53,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 10:33:53,376 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:33:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:33:53,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1296238366, now seen corresponding path program 12 times [2022-07-13 10:33:53,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:33:53,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534552156] [2022-07-13 10:33:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:33:53,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:33:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:33:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 2 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:33:58,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:33:58,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534552156] [2022-07-13 10:33:58,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534552156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:33:58,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683089809] [2022-07-13 10:33:58,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:33:58,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:33:58,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:33:58,711 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:33:58,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:33:58,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-13 10:33:58,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:33:58,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-13 10:33:58,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:34:02,754 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:34:02,754 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 17 treesize of output 18 [2022-07-13 10:34:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 3 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:34:03,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:34:10,279 INFO L356 Elim1Store]: treesize reduction 387, result has 41.2 percent of original size [2022-07-13 10:34:10,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 285 [2022-07-13 10:34:11,179 INFO L356 Elim1Store]: treesize reduction 591, result has 10.2 percent of original size [2022-07-13 10:34:11,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 88 treesize of output 82 [2022-07-13 10:34:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 10:34:11,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683089809] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:34:11,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:34:11,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 32, 26] total 124 [2022-07-13 10:34:11,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708533271] [2022-07-13 10:34:11,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:34:11,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-07-13 10:34:11,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:34:11,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-07-13 10:34:11,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=762, Invalid=14490, Unknown=0, NotChecked=0, Total=15252 [2022-07-13 10:34:11,321 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 124 states, 124 states have (on average 2.0161290322580645) internal successors, (250), 124 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:34:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:34:24,307 INFO L93 Difference]: Finished difference Result 273 states and 295 transitions. [2022-07-13 10:34:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-07-13 10:34:24,308 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0161290322580645) internal successors, (250), 124 states have internal predecessors, (250), 0 states have call successors, (0), 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 89 [2022-07-13 10:34:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:34:24,308 INFO L225 Difference]: With dead ends: 273 [2022-07-13 10:34:24,309 INFO L226 Difference]: Without dead ends: 267 [2022-07-13 10:34:24,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 104 SyntacticMatches, 32 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16747 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=2520, Invalid=46100, Unknown=0, NotChecked=0, Total=48620 [2022-07-13 10:34:24,311 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1785 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:34:24,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 201 Invalid, 4373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 2228 Invalid, 0 Unknown, 1785 Unchecked, 1.3s Time] [2022-07-13 10:34:24,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-13 10:34:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 157. [2022-07-13 10:34:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0897435897435896) internal successors, (170), 156 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:34:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 170 transitions. [2022-07-13 10:34:24,330 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 170 transitions. Word has length 89 [2022-07-13 10:34:24,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:34:24,330 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 170 transitions. [2022-07-13 10:34:24,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0161290322580645) internal successors, (250), 124 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:34:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 170 transitions. [2022-07-13 10:34:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:34:24,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:34:24,331 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:34:24,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:34:24,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 10:34:24,559 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:34:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:34:24,560 INFO L85 PathProgramCache]: Analyzing trace with hash -91318780, now seen corresponding path program 13 times [2022-07-13 10:34:24,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:34:24,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461923932] [2022-07-13 10:34:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:34:24,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:34:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:34:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-13 10:34:24,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:34:24,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461923932] [2022-07-13 10:34:24,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461923932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:34:24,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868782055] [2022-07-13 10:34:24,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:34:24,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:34:24,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:34:24,673 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:34:24,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 10:34:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:34:24,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 10:34:24,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:34:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-13 10:34:24,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:34:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-13 10:34:25,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868782055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:34:25,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:34:25,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-13 10:34:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120933231] [2022-07-13 10:34:25,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:34:25,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 10:34:25,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:34:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 10:34:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-13 10:34:25,006 INFO L87 Difference]: Start difference. First operand 157 states and 170 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:34:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:34:25,368 INFO L93 Difference]: Finished difference Result 350 states and 379 transitions. [2022-07-13 10:34:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 10:34:25,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 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 91 [2022-07-13 10:34:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:34:25,369 INFO L225 Difference]: With dead ends: 350 [2022-07-13 10:34:25,369 INFO L226 Difference]: Without dead ends: 170 [2022-07-13 10:34:25,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-13 10:34:25,370 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 220 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:34:25,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 45 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:34:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-13 10:34:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 150. [2022-07-13 10:34:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0738255033557047) internal successors, (160), 149 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:34:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2022-07-13 10:34:25,383 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 91 [2022-07-13 10:34:25,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:34:25,383 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2022-07-13 10:34:25,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:34:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2022-07-13 10:34:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-13 10:34:25,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:34:25,384 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:34:25,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:34:25,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 10:34:25,592 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:34:25,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:34:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash 688277478, now seen corresponding path program 14 times [2022-07-13 10:34:25,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:34:25,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939895735] [2022-07-13 10:34:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:34:25,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:34:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:34:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-13 10:34:25,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:34:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939895735] [2022-07-13 10:34:25,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939895735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:34:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557433507] [2022-07-13 10:34:25,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:34:25,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:34:25,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:34:25,695 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:34:25,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 10:34:25,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:34:25,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:34:25,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 10:34:25,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:34:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-13 10:34:25,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:34:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-13 10:34:25,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557433507] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:34:25,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:34:25,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-13 10:34:25,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140688033] [2022-07-13 10:34:25,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:34:25,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 10:34:25,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:34:25,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 10:34:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-13 10:34:25,938 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:34:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:34:26,301 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2022-07-13 10:34:26,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 10:34:26,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 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 93 [2022-07-13 10:34:26,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:34:26,302 INFO L225 Difference]: With dead ends: 162 [2022-07-13 10:34:26,302 INFO L226 Difference]: Without dead ends: 110 [2022-07-13 10:34:26,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 10:34:26,302 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 206 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:34:26,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 26 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:34:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-13 10:34:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2022-07-13 10:34:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:34:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2022-07-13 10:34:26,313 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 93 [2022-07-13 10:34:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:34:26,313 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2022-07-13 10:34:26,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:34:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2022-07-13 10:34:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 10:34:26,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:34:26,314 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:34:26,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 10:34:26,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:34:26,534 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:34:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:34:26,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1101361904, now seen corresponding path program 15 times [2022-07-13 10:34:26,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:34:26,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969317642] [2022-07-13 10:34:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:34:26,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:34:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:34:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 2 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:34:33,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:34:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969317642] [2022-07-13 10:34:33,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969317642] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:34:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194032831] [2022-07-13 10:34:33,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:34:33,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:34:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:34:33,783 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:34:33,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 10:34:33,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-13 10:34:33,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:34:33,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 172 conjunts are in the unsatisfiable core [2022-07-13 10:34:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:34:33,962 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 [2022-07-13 10:34:39,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:34:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:34:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:34:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:34:39,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:34:39,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:34:39,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:34:39,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:34:39,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:34:39,618 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:34:39,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 101 [2022-07-13 10:34:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 7 proven. 236 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:34:40,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:34:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 10:34:50,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194032831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:34:50,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:34:50,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 35, 29] total 143 [2022-07-13 10:34:50,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958066667] [2022-07-13 10:34:50,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:34:50,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-07-13 10:34:50,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:34:50,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-07-13 10:34:50,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=19304, Unknown=0, NotChecked=0, Total=20306 [2022-07-13 10:34:50,686 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 143 states, 143 states have (on average 2.0) internal successors, (286), 143 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:35:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:35:11,671 INFO L93 Difference]: Finished difference Result 198 states and 211 transitions. [2022-07-13 10:35:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-07-13 10:35:11,672 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 143 states have internal predecessors, (286), 0 states have call successors, (0), 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 103 [2022-07-13 10:35:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:35:11,673 INFO L225 Difference]: With dead ends: 198 [2022-07-13 10:35:11,673 INFO L226 Difference]: Without dead ends: 194 [2022-07-13 10:35:11,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 126 SyntacticMatches, 36 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17730 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=3128, Invalid=56164, Unknown=0, NotChecked=0, Total=59292 [2022-07-13 10:35:11,675 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 2656 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 4553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1558 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:35:11,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 216 Invalid, 4553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2656 Invalid, 0 Unknown, 1558 Unchecked, 1.7s Time] [2022-07-13 10:35:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-13 10:35:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 151. [2022-07-13 10:35:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0733333333333333) internal successors, (161), 150 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:35:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2022-07-13 10:35:11,694 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 103 [2022-07-13 10:35:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:35:11,694 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2022-07-13 10:35:11,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 143 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:35:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2022-07-13 10:35:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-13 10:35:11,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:35:11,695 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:35:11,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 10:35:11,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 10:35:11,896 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:35:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:35:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1793599822, now seen corresponding path program 16 times [2022-07-13 10:35:11,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:35:11,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049321394] [2022-07-13 10:35:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:35:11,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:35:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:35:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-13 10:35:12,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:35:12,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049321394] [2022-07-13 10:35:12,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049321394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:35:12,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705739652] [2022-07-13 10:35:12,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:35:12,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:35:12,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:35:12,014 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:35:12,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 10:35:12,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:35:12,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:35:12,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 10:35:12,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:35:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-13 10:35:12,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:35:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-13 10:35:12,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705739652] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:35:12,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:35:12,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-13 10:35:12,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012871762] [2022-07-13 10:35:12,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:35:12,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 10:35:12,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:35:12,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 10:35:12,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-13 10:35:12,384 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:35:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:35:12,873 INFO L93 Difference]: Finished difference Result 386 states and 414 transitions. [2022-07-13 10:35:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 10:35:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 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 105 [2022-07-13 10:35:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:35:12,874 INFO L225 Difference]: With dead ends: 386 [2022-07-13 10:35:12,874 INFO L226 Difference]: Without dead ends: 177 [2022-07-13 10:35:12,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 10:35:12,875 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 411 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:35:12,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 37 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 10:35:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-13 10:35:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 158. [2022-07-13 10:35:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0636942675159236) internal successors, (167), 157 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:35:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 167 transitions. [2022-07-13 10:35:12,893 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 167 transitions. Word has length 105 [2022-07-13 10:35:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:35:12,893 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 167 transitions. [2022-07-13 10:35:12,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:35:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 167 transitions. [2022-07-13 10:35:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 10:35:12,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:35:12,894 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:35:12,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 10:35:13,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:35:13,107 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:35:13,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:35:13,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1629639498, now seen corresponding path program 17 times [2022-07-13 10:35:13,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:35:13,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851363177] [2022-07-13 10:35:13,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:35:13,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:35:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:35:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-13 10:35:13,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:35:13,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851363177] [2022-07-13 10:35:13,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851363177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:35:13,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489744457] [2022-07-13 10:35:13,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:35:13,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:35:13,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:35:13,230 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:35:13,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 10:35:13,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-13 10:35:13,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:35:13,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 10:35:13,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:35:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-13 10:35:13,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:35:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-13 10:35:13,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489744457] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:35:13,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:35:13,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-13 10:35:13,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96513519] [2022-07-13 10:35:13,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:35:13,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 10:35:13,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:35:13,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 10:35:13,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-13 10:35:13,986 INFO L87 Difference]: Start difference. First operand 158 states and 167 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:35:14,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:35:14,397 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2022-07-13 10:35:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 10:35:14,398 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 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 [2022-07-13 10:35:14,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:35:14,398 INFO L225 Difference]: With dead ends: 170 [2022-07-13 10:35:14,398 INFO L226 Difference]: Without dead ends: 124 [2022-07-13 10:35:14,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 10:35:14,399 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 238 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:35:14,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 33 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:35:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-13 10:35:14,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2022-07-13 10:35:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0598290598290598) internal successors, (124), 117 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:35:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2022-07-13 10:35:14,414 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 109 [2022-07-13 10:35:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:35:14,414 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2022-07-13 10:35:14,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:35:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2022-07-13 10:35:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-13 10:35:14,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:35:14,415 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:35:14,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 10:35:14,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:35:14,617 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:35:14,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:35:14,618 INFO L85 PathProgramCache]: Analyzing trace with hash 680376510, now seen corresponding path program 18 times [2022-07-13 10:35:14,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:35:14,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178457313] [2022-07-13 10:35:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:35:14,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:35:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:35:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 20 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:35:25,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:35:25,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178457313] [2022-07-13 10:35:25,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178457313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:35:25,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853478195] [2022-07-13 10:35:25,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:35:25,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:35:25,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:35:25,068 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:35:25,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 10:35:25,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-13 10:35:25,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:35:25,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 196 conjunts are in the unsatisfiable core [2022-07-13 10:35:25,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:35:40,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:35:40,293 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:35:40,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 100 treesize of output 361 [2022-07-13 10:35:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 11 proven. 307 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 10:35:41,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:35:54,950 INFO L356 Elim1Store]: treesize reduction 1183, result has 20.9 percent of original size [2022-07-13 10:35:54,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 332 [2022-07-13 10:35:55,542 INFO L356 Elim1Store]: treesize reduction 1343, result has 10.2 percent of original size [2022-07-13 10:35:55,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 133 treesize of output 171 [2022-07-13 10:35:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 10:35:55,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853478195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:35:55,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:35:55,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 38, 34] total 167 [2022-07-13 10:35:55,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607132055] [2022-07-13 10:35:55,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:35:55,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-07-13 10:35:55,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:35:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-07-13 10:35:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1285, Invalid=26436, Unknown=1, NotChecked=0, Total=27722 [2022-07-13 10:35:55,756 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 167 states, 167 states have (on average 1.9341317365269461) internal successors, (323), 167 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)