./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_const2.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 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:09:02,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:09:02,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:09:02,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:09:02,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:09:02,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:09:02,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:09:02,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:09:02,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:09:02,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:09:02,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:09:02,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:09:02,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:09:02,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:09:02,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:09:02,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:09:02,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:09:02,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:09:02,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:09:02,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:09:02,417 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:09:02,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:09:02,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:09:02,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:09:02,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:09:02,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:09:02,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:09:02,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:09:02,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:09:02,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:09:02,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:09:02,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:09:02,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:09:02,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:09:02,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:09:02,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:09:02,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:09:02,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:09:02,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:09:02,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:09:02,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:09:02,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:09:02,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:09:02,463 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:09:02,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:09:02,463 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:09:02,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:09:02,464 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:09:02,464 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:09:02,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:09:02,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:09:02,465 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:09:02,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:09:02,465 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:09:02,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:09:02,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:09:02,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:09:02,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:09:02,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:09:02,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:09:02,466 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:09:02,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:09:02,467 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:09:02,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:09:02,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:09:02,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:09:02,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:09:02,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:09:02,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:09:02,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:09:02,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:09:02,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:09:02,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:09:02,469 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:09:02,469 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:09:02,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:09:02,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c [2022-07-22 10:09:02,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:09:02,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:09:02,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:09:02,664 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:09:02,665 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:09:02,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const2.c [2022-07-22 10:09:02,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4886aac88/fd3be9de105746bc8d3ed823169427c1/FLAGf3cc21290 [2022-07-22 10:09:03,105 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:09:03,106 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const2.c [2022-07-22 10:09:03,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4886aac88/fd3be9de105746bc8d3ed823169427c1/FLAGf3cc21290 [2022-07-22 10:09:03,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4886aac88/fd3be9de105746bc8d3ed823169427c1 [2022-07-22 10:09:03,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:09:03,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:09:03,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:09:03,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:09:03,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:09:03,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29e97fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03, skipping insertion in model container [2022-07-22 10:09:03,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:09:03,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:09:03,298 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_const2.c[406,419] [2022-07-22 10:09:03,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:09:03,321 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:09:03,329 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_const2.c[406,419] [2022-07-22 10:09:03,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:09:03,344 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:09:03,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03 WrapperNode [2022-07-22 10:09:03,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:09:03,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:09:03,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:09:03,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:09:03,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,369 INFO L137 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-07-22 10:09:03,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:09:03,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:09:03,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:09:03,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:09:03,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:09:03,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:09:03,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:09:03,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:09:03,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03" (1/1) ... [2022-07-22 10:09:03,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:09:03,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:03,415 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) [2022-07-22 10:09:03,421 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 [2022-07-22 10:09:03,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:09:03,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:09:03,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:09:03,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 10:09:03,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:09:03,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:09:03,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:09:03,492 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:09:03,493 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:09:03,604 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:09:03,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:09:03,608 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-22 10:09:03,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:09:03 BoogieIcfgContainer [2022-07-22 10:09:03,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:09:03,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:09:03,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:09:03,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:09:03,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:09:03" (1/3) ... [2022-07-22 10:09:03,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b45d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:09:03, skipping insertion in model container [2022-07-22 10:09:03,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:09:03" (2/3) ... [2022-07-22 10:09:03,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b45d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:09:03, skipping insertion in model container [2022-07-22 10:09:03,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:09:03" (3/3) ... [2022-07-22 10:09:03,618 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2022-07-22 10:09:03,630 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:09:03,631 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:09:03,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:09:03,691 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@6f9861ce, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4b8251ce [2022-07-22 10:09:03,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:09:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 10:09:03,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:03,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:03,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:03,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:03,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2022-07-22 10:09:03,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:03,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838014867] [2022-07-22 10:09:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:03,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:03,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:03,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838014867] [2022-07-22 10:09:03,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838014867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:09:03,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:09:03,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:09:03,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552380374] [2022-07-22 10:09:03,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:09:03,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:09:03,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:09:03,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:09:03,907 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:03,922 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-07-22 10:09:03,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:09:03,924 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-07-22 10:09:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:03,930 INFO L225 Difference]: With dead ends: 47 [2022-07-22 10:09:03,930 INFO L226 Difference]: Without dead ends: 21 [2022-07-22 10:09:03,932 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 [2022-07-22 10:09:03,936 INFO L413 NwaCegarLoop]: 31 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, 31 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 [2022-07-22 10:09:03,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:09:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-22 10:09:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-22 10:09:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-22 10:09:03,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-07-22 10:09:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:03,965 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-22 10:09:03,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-22 10:09:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 10:09:03,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:03,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:03,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 10:09:03,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:03,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:03,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2022-07-22 10:09:03,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:03,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108189421] [2022-07-22 10:09:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:03,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:04,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:04,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108189421] [2022-07-22 10:09:04,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108189421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:09:04,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:09:04,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 10:09:04,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551493314] [2022-07-22 10:09:04,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:09:04,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 10:09:04,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:04,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 10:09:04,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 10:09:04,076 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:04,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:04,112 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-07-22 10:09:04,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 10:09:04,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-07-22 10:09:04,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:04,113 INFO L225 Difference]: With dead ends: 39 [2022-07-22 10:09:04,113 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 10:09:04,113 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 [2022-07-22 10:09:04,114 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:04,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:09:04,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 10:09:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-22 10:09:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-22 10:09:04,118 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-07-22 10:09:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:04,119 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-22 10:09:04,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-22 10:09:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 10:09:04,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:04,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 10:09:04,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:04,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:04,120 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2022-07-22 10:09:04,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:04,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039254139] [2022-07-22 10:09:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:04,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:09:04,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039254139] [2022-07-22 10:09:04,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039254139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:09:04,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:09:04,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:09:04,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655734380] [2022-07-22 10:09:04,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:09:04,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:09:04,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:04,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:09:04,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:09:04,191 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:04,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:04,269 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-07-22 10:09:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:09:04,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-22 10:09:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:04,270 INFO L225 Difference]: With dead ends: 44 [2022-07-22 10:09:04,270 INFO L226 Difference]: Without dead ends: 31 [2022-07-22 10:09:04,271 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 [2022-07-22 10:09:04,271 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:04,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 13 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:09:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-22 10:09:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-07-22 10:09:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-22 10:09:04,276 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-07-22 10:09:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:04,276 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-22 10:09:04,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-22 10:09:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 10:09:04,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:04,278 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] [2022-07-22 10:09:04,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 10:09:04,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2022-07-22 10:09:04,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:04,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112962430] [2022-07-22 10:09:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:04,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:09:04,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:04,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112962430] [2022-07-22 10:09:04,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112962430] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:04,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727866110] [2022-07-22 10:09:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:04,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:04,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:04,361 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) [2022-07-22 10:09:04,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:09:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:04,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:09:04,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:09:04,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:09:04,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727866110] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:04,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:04,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 10:09:04,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111161014] [2022-07-22 10:09:04,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:04,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 10:09:04,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 10:09:04,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:09:04,540 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:04,593 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-22 10:09:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 10:09:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 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 25 [2022-07-22 10:09:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:04,594 INFO L225 Difference]: With dead ends: 49 [2022-07-22 10:09:04,595 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 10:09:04,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:09:04,596 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:04,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:09:04,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 10:09:04,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-22 10:09:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-07-22 10:09:04,600 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2022-07-22 10:09:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:04,600 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-07-22 10:09:04,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-07-22 10:09:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 10:09:04,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:04,601 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] [2022-07-22 10:09:04,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:04,820 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 [2022-07-22 10:09:04,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2022-07-22 10:09:04,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:04,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292228114] [2022-07-22 10:09:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:09:04,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:04,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292228114] [2022-07-22 10:09:04,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292228114] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:04,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824518234] [2022-07-22 10:09:04,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:09:04,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:04,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:04,895 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) [2022-07-22 10:09:04,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:09:04,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:09:04,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:04,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:09:04,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:09:05,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:09:05,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824518234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:05,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:05,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-22 10:09:05,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357889850] [2022-07-22 10:09:05,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:05,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 10:09:05,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:05,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 10:09:05,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-22 10:09:05,060 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:05,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:05,149 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-22 10:09:05,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 10:09:05,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 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 27 [2022-07-22 10:09:05,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:05,151 INFO L225 Difference]: With dead ends: 57 [2022-07-22 10:09:05,152 INFO L226 Difference]: Without dead ends: 41 [2022-07-22 10:09:05,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:09:05,153 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:05,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:09:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-22 10:09:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-07-22 10:09:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 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) [2022-07-22 10:09:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-07-22 10:09:05,168 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2022-07-22 10:09:05,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:05,169 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-07-22 10:09:05,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-07-22 10:09:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 10:09:05,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:05,171 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:05,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:05,375 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 [2022-07-22 10:09:05,375 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:05,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2022-07-22 10:09:05,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:05,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090270232] [2022-07-22 10:09:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:05,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:06,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:06,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090270232] [2022-07-22 10:09:06,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090270232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:06,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868010757] [2022-07-22 10:09:06,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:09:06,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:06,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:06,024 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) [2022-07-22 10:09:06,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:09:06,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 10:09:06,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:06,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 10:09:06,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:06,794 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:09:06,795 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 [2022-07-22 10:09:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:06,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:08,579 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:09:08,580 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 [2022-07-22 10:09:08,966 INFO L356 Elim1Store]: treesize reduction 76, result has 10.6 percent of original size [2022-07-22 10:09:08,967 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 18 [2022-07-22 10:09:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:09,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868010757] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:09,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:09,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 24] total 55 [2022-07-22 10:09:09,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957129350] [2022-07-22 10:09:09,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:09,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-22 10:09:09,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:09,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-22 10:09:09,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2671, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 10:09:09,393 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 55 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:12,118 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2022-07-22 10:09:12,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 10:09:12,120 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 55 states have internal predecessors, (97), 0 states have call successors, (0), 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 [2022-07-22 10:09:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:12,121 INFO L225 Difference]: With dead ends: 89 [2022-07-22 10:09:12,121 INFO L226 Difference]: Without dead ends: 83 [2022-07-22 10:09:12,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 35 SyntacticMatches, 13 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=906, Invalid=8214, Unknown=0, NotChecked=0, Total=9120 [2022-07-22 10:09:12,124 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:12,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 72 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 361 Invalid, 0 Unknown, 495 Unchecked, 0.2s Time] [2022-07-22 10:09:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-22 10:09:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2022-07-22 10:09:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2022-07-22 10:09:12,131 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2022-07-22 10:09:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:12,131 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2022-07-22 10:09:12,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 55 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2022-07-22 10:09:12,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 10:09:12,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:12,133 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:12,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:12,349 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 [2022-07-22 10:09:12,350 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:12,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:12,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2022-07-22 10:09:12,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:12,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34754005] [2022-07-22 10:09:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:12,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:09:12,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:12,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34754005] [2022-07-22 10:09:12,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34754005] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:12,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067063356] [2022-07-22 10:09:12,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:09:12,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:12,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:12,399 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) [2022-07-22 10:09:12,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:09:12,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:09:12,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:12,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:09:12,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:09:12,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:09:12,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067063356] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:12,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:12,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-22 10:09:12,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756400490] [2022-07-22 10:09:12,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:12,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 10:09:12,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:12,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 10:09:12,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:09:12,532 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:12,654 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2022-07-22 10:09:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 10:09:12,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 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 37 [2022-07-22 10:09:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:12,655 INFO L225 Difference]: With dead ends: 121 [2022-07-22 10:09:12,655 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 10:09:12,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:09:12,656 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:12,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 34 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:09:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 10:09:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2022-07-22 10:09:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 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) [2022-07-22 10:09:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-07-22 10:09:12,661 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2022-07-22 10:09:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:12,661 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-07-22 10:09:12,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-07-22 10:09:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 10:09:12,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:12,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:12,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:12,875 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 [2022-07-22 10:09:12,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:12,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:12,876 INFO L85 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2022-07-22 10:09:12,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:12,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107303883] [2022-07-22 10:09:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:12,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 10:09:12,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107303883] [2022-07-22 10:09:12,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107303883] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404362342] [2022-07-22 10:09:12,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:09:12,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:12,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:12,936 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) [2022-07-22 10:09:12,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 10:09:12,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 10:09:12,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:12,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:09:12,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 10:09:13,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 10:09:13,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404362342] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:13,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:13,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-22 10:09:13,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262872736] [2022-07-22 10:09:13,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:13,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 10:09:13,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:13,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 10:09:13,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:09:13,074 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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) [2022-07-22 10:09:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:13,211 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-07-22 10:09:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 10:09:13,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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) Word has length 39 [2022-07-22 10:09:13,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:13,212 INFO L225 Difference]: With dead ends: 66 [2022-07-22 10:09:13,212 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 10:09:13,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-22 10:09:13,213 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:13,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 31 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:09:13,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 10:09:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-07-22 10:09:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-22 10:09:13,217 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-07-22 10:09:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:13,218 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-22 10:09:13,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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) [2022-07-22 10:09:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-22 10:09:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 10:09:13,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:13,219 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:09:13,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:13,419 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 [2022-07-22 10:09:13,419 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:13,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:13,420 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2022-07-22 10:09:13,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:13,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898459831] [2022-07-22 10:09:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:13,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:14,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898459831] [2022-07-22 10:09:14,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898459831] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927118501] [2022-07-22 10:09:14,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:09:14,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:14,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:14,794 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) [2022-07-22 10:09:14,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 10:09:14,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-22 10:09:14,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:14,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-22 10:09:14,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:15,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2022-07-22 10:09:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:09:15,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:16,353 INFO L356 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2022-07-22 10:09:16,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-07-22 10:09:16,491 INFO L356 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2022-07-22 10:09:16,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-07-22 10:09:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:09:16,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927118501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:16,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:16,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 17, 16] total 62 [2022-07-22 10:09:16,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639580672] [2022-07-22 10:09:16,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:16,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-22 10:09:16,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:16,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-22 10:09:16,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3554, Unknown=0, NotChecked=0, Total=3782 [2022-07-22 10:09:16,562 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 62 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 62 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) [2022-07-22 10:09:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:19,488 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-07-22 10:09:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 10:09:19,495 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 62 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) Word has length 45 [2022-07-22 10:09:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:19,496 INFO L225 Difference]: With dead ends: 80 [2022-07-22 10:09:19,496 INFO L226 Difference]: Without dead ends: 76 [2022-07-22 10:09:19,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 11 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2398 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=677, Invalid=9025, Unknown=0, NotChecked=0, Total=9702 [2022-07-22 10:09:19,498 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:19,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 10:09:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-22 10:09:19,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2022-07-22 10:09:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2022-07-22 10:09:19,517 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2022-07-22 10:09:19,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:19,517 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2022-07-22 10:09:19,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 62 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) [2022-07-22 10:09:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2022-07-22 10:09:19,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 10:09:19,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:19,518 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:19,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:19,718 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 [2022-07-22 10:09:19,719 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2022-07-22 10:09:19,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:19,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580328380] [2022-07-22 10:09:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:19,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 10:09:19,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:19,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580328380] [2022-07-22 10:09:19,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580328380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:19,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859207723] [2022-07-22 10:09:19,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:09:19,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:19,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:19,816 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) [2022-07-22 10:09:19,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 10:09:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:19,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:09:19,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 10:09:19,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 10:09:19,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859207723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:19,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:19,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-22 10:09:19,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666555291] [2022-07-22 10:09:19,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:19,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 10:09:19,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:19,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 10:09:19,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:09:19,994 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:20,148 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2022-07-22 10:09:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 10:09:20,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2022-07-22 10:09:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:20,149 INFO L225 Difference]: With dead ends: 149 [2022-07-22 10:09:20,149 INFO L226 Difference]: Without dead ends: 86 [2022-07-22 10:09:20,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-22 10:09:20,150 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 133 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:20,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 36 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:09:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-22 10:09:20,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2022-07-22 10:09:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2022-07-22 10:09:20,156 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2022-07-22 10:09:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:20,157 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2022-07-22 10:09:20,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:20,157 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2022-07-22 10:09:20,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 10:09:20,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:20,157 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:20,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:20,374 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 [2022-07-22 10:09:20,374 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:20,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:20,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2022-07-22 10:09:20,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:20,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346104450] [2022-07-22 10:09:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:20,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 10:09:20,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:20,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346104450] [2022-07-22 10:09:20,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346104450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:20,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531475505] [2022-07-22 10:09:20,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:09:20,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:20,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:20,439 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) [2022-07-22 10:09:20,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 10:09:20,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:09:20,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:20,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:09:20,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 10:09:20,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 10:09:20,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531475505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:20,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:20,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-22 10:09:20,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620081575] [2022-07-22 10:09:20,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:20,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 10:09:20,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:20,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 10:09:20,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:09:20,601 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:20,794 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-07-22 10:09:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 10:09:20,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2022-07-22 10:09:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:20,794 INFO L225 Difference]: With dead ends: 80 [2022-07-22 10:09:20,794 INFO L226 Difference]: Without dead ends: 60 [2022-07-22 10:09:20,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-07-22 10:09:20,795 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 108 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:20,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:09:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-22 10:09:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-07-22 10:09:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-07-22 10:09:20,801 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2022-07-22 10:09:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:20,801 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-07-22 10:09:20,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-07-22 10:09:20,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 10:09:20,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:20,803 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:09:20,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 10:09:21,003 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 [2022-07-22 10:09:21,003 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2022-07-22 10:09:21,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:21,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557259341] [2022-07-22 10:09:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:21,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:23,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:23,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557259341] [2022-07-22 10:09:23,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557259341] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:23,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551692554] [2022-07-22 10:09:23,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:09:23,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:23,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:23,122 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) [2022-07-22 10:09:23,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 10:09:23,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 10:09:23,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:23,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-22 10:09:23,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:23,238 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 [2022-07-22 10:09:28,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:28,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:28,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:28,829 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:09:28,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 145 [2022-07-22 10:09:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:09:29,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:09:32,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551692554] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:32,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:32,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 26, 21] total 86 [2022-07-22 10:09:32,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99731901] [2022-07-22 10:09:32,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:32,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-22 10:09:32,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:32,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-22 10:09:32,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=6763, Unknown=1, NotChecked=0, Total=7310 [2022-07-22 10:09:32,984 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 86 states, 86 states have (on average 1.7325581395348837) internal successors, (149), 86 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:38,016 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-07-22 10:09:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-22 10:09:38,016 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.7325581395348837) internal successors, (149), 86 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-22 10:09:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:38,017 INFO L225 Difference]: With dead ends: 98 [2022-07-22 10:09:38,017 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 10:09:38,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 60 SyntacticMatches, 13 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5421 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1365, Invalid=17540, Unknown=1, NotChecked=0, Total=18906 [2022-07-22 10:09:38,020 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:38,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 141 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 965 Invalid, 0 Unknown, 577 Unchecked, 0.5s Time] [2022-07-22 10:09:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 10:09:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2022-07-22 10:09:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2022-07-22 10:09:38,032 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2022-07-22 10:09:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:38,032 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2022-07-22 10:09:38,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.7325581395348837) internal successors, (149), 86 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2022-07-22 10:09:38,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 10:09:38,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:38,036 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:09:38,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:38,252 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 [2022-07-22 10:09:38,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:38,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:38,253 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2022-07-22 10:09:38,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:38,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553330872] [2022-07-22 10:09:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:38,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 10:09:38,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:38,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553330872] [2022-07-22 10:09:38,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553330872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:38,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452042375] [2022-07-22 10:09:38,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:09:38,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:38,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:38,339 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) [2022-07-22 10:09:38,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 10:09:38,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:09:38,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:38,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 10:09:38,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 10:09:38,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 10:09:38,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452042375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:38,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:38,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-22 10:09:38,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536442613] [2022-07-22 10:09:38,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:38,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 10:09:38,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 10:09:38,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-22 10:09:38,541 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:38,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:38,737 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2022-07-22 10:09:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 10:09:38,738 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-22 10:09:38,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:38,738 INFO L225 Difference]: With dead ends: 177 [2022-07-22 10:09:38,738 INFO L226 Difference]: Without dead ends: 100 [2022-07-22 10:09:38,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-22 10:09:38,740 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 135 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:38,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 42 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:09:38,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-22 10:09:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2022-07-22 10:09:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2022-07-22 10:09:38,765 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2022-07-22 10:09:38,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:38,765 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2022-07-22 10:09:38,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:38,765 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2022-07-22 10:09:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 10:09:38,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:38,767 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:38,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:38,968 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 [2022-07-22 10:09:38,968 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2022-07-22 10:09:38,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:38,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199257079] [2022-07-22 10:09:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:38,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 10:09:39,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:39,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199257079] [2022-07-22 10:09:39,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199257079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:39,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818303785] [2022-07-22 10:09:39,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:09:39,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:39,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:39,040 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) [2022-07-22 10:09:39,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 10:09:39,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 10:09:39,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:39,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 10:09:39,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 10:09:39,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 10:09:39,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818303785] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:39,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:39,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-22 10:09:39,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142574932] [2022-07-22 10:09:39,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:39,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 10:09:39,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 10:09:39,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-22 10:09:39,266 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:39,492 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2022-07-22 10:09:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 10:09:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-22 10:09:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:39,493 INFO L225 Difference]: With dead ends: 94 [2022-07-22 10:09:39,493 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 10:09:39,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-07-22 10:09:39,494 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 107 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:39,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 29 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:09:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 10:09:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2022-07-22 10:09:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-07-22 10:09:39,499 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2022-07-22 10:09:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:39,500 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-07-22 10:09:39,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-07-22 10:09:39,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 10:09:39,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:39,500 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:09:39,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:39,706 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 [2022-07-22 10:09:39,707 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:39,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2022-07-22 10:09:39,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:39,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891809561] [2022-07-22 10:09:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:39,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:42,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891809561] [2022-07-22 10:09:42,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891809561] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668274239] [2022-07-22 10:09:42,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:09:42,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:42,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:42,491 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) [2022-07-22 10:09:42,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 10:09:42,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 10:09:42,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:42,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 102 conjunts are in the unsatisfiable core [2022-07-22 10:09:42,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:44,727 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:09:44,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 63 [2022-07-22 10:09:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:09:44,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:51,135 INFO L356 Elim1Store]: treesize reduction 387, result has 41.2 percent of original size [2022-07-22 10:09:51,135 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 286 [2022-07-22 10:09:51,684 INFO L356 Elim1Store]: treesize reduction 593, result has 9.9 percent of original size [2022-07-22 10:09:51,684 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 79 [2022-07-22 10:09:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 10:09:51,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668274239] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:51,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:51,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 32, 26] total 106 [2022-07-22 10:09:51,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888494937] [2022-07-22 10:09:51,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:51,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-07-22 10:09:51,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:51,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-07-22 10:09:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=10520, Unknown=0, NotChecked=0, Total=11130 [2022-07-22 10:09:51,800 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 106 states, 106 states have (on average 1.679245283018868) internal successors, (178), 106 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:57,611 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2022-07-22 10:09:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 10:09:57,612 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.679245283018868) internal successors, (178), 106 states have internal predecessors, (178), 0 states have call successors, (0), 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 [2022-07-22 10:09:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:57,612 INFO L225 Difference]: With dead ends: 108 [2022-07-22 10:09:57,612 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 10:09:57,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 69 SyntacticMatches, 16 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7693 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1422, Invalid=23700, Unknown=0, NotChecked=0, Total=25122 [2022-07-22 10:09:57,614 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 902 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:57,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 159 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1186 Invalid, 0 Unknown, 902 Unchecked, 0.6s Time] [2022-07-22 10:09:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 10:09:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2022-07-22 10:09:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 94 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2022-07-22 10:09:57,623 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 65 [2022-07-22 10:09:57,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:57,624 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2022-07-22 10:09:57,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.679245283018868) internal successors, (178), 106 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2022-07-22 10:09:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 10:09:57,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:57,624 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:57,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:57,831 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 [2022-07-22 10:09:57,831 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:57,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2022-07-22 10:09:57,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:57,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118955597] [2022-07-22 10:09:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:57,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 10:09:57,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:57,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118955597] [2022-07-22 10:09:57,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118955597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:57,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552525866] [2022-07-22 10:09:57,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:09:57,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:57,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:57,928 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) [2022-07-22 10:09:57,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 10:09:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:57,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 10:09:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 10:09:58,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 10:09:58,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552525866] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:58,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:58,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-22 10:09:58,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266088170] [2022-07-22 10:09:58,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:58,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 10:09:58,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:58,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 10:09:58,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:09:58,160 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:58,431 INFO L93 Difference]: Finished difference Result 205 states and 220 transitions. [2022-07-22 10:09:58,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 10:09:58,431 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-22 10:09:58,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:58,432 INFO L225 Difference]: With dead ends: 205 [2022-07-22 10:09:58,432 INFO L226 Difference]: Without dead ends: 114 [2022-07-22 10:09:58,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-22 10:09:58,433 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 150 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:58,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 44 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:09:58,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-22 10:09:58,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2022-07-22 10:09:58,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2022-07-22 10:09:58,443 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 67 [2022-07-22 10:09:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:58,443 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2022-07-22 10:09:58,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2022-07-22 10:09:58,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 10:09:58,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:58,444 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:58,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:58,656 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 [2022-07-22 10:09:58,657 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:58,657 INFO L85 PathProgramCache]: Analyzing trace with hash 2014257346, now seen corresponding path program 14 times [2022-07-22 10:09:58,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:58,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851656897] [2022-07-22 10:09:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:58,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 10:09:58,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:58,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851656897] [2022-07-22 10:09:58,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851656897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:58,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494487799] [2022-07-22 10:09:58,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:09:58,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:58,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:58,739 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) [2022-07-22 10:09:58,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 10:09:58,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:09:58,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 10:09:58,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 10:09:58,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 10:09:58,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494487799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:58,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:58,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-22 10:09:58,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429990437] [2022-07-22 10:09:58,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:58,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 10:09:58,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:58,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 10:09:58,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:09:58,943 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:59,213 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2022-07-22 10:09:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 10:09:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 10:09:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:59,214 INFO L225 Difference]: With dead ends: 108 [2022-07-22 10:09:59,214 INFO L226 Difference]: Without dead ends: 80 [2022-07-22 10:09:59,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 10:09:59,215 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 148 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:59,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 33 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:09:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-22 10:09:59,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-07-22 10:09:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-07-22 10:09:59,223 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2022-07-22 10:09:59,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:59,223 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-07-22 10:09:59,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-07-22 10:09:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 10:09:59,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:59,224 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:09:59,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:59,424 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 [2022-07-22 10:09:59,424 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2022-07-22 10:09:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:59,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038400134] [2022-07-22 10:09:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 4 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:10:03,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:10:03,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038400134] [2022-07-22 10:10:03,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038400134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:10:03,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895251784] [2022-07-22 10:10:03,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:10:03,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:03,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:10:03,544 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) [2022-07-22 10:10:03,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 10:10:03,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-22 10:10:03,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:10:03,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 122 conjunts are in the unsatisfiable core [2022-07-22 10:10:03,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:10:03,693 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 [2022-07-22 10:10:07,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:07,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:07,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:07,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:07,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:07,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:07,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:07,243 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:10:07,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 239 [2022-07-22 10:10:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 164 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:10:07,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:10:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 10:10:17,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895251784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:10:17,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:10:17,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 35, 29] total 122 [2022-07-22 10:10:17,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388282380] [2022-07-22 10:10:17,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:10:17,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-07-22 10:10:17,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:10:17,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-07-22 10:10:17,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=14036, Unknown=0, NotChecked=0, Total=14762 [2022-07-22 10:10:17,843 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 122 states, 122 states have (on average 1.6557377049180328) internal successors, (202), 122 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:10:28,042 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2022-07-22 10:10:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-22 10:10:28,042 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.6557377049180328) internal successors, (202), 122 states have internal predecessors, (202), 0 states have call successors, (0), 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 [2022-07-22 10:10:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:10:28,043 INFO L225 Difference]: With dead ends: 125 [2022-07-22 10:10:28,043 INFO L226 Difference]: Without dead ends: 121 [2022-07-22 10:10:28,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 79 SyntacticMatches, 18 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8610 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=1864, Invalid=33292, Unknown=0, NotChecked=0, Total=35156 [2022-07-22 10:10:28,045 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1162 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 10:10:28,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 177 Invalid, 3113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1834 Invalid, 0 Unknown, 1162 Unchecked, 0.9s Time] [2022-07-22 10:10:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-22 10:10:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2022-07-22 10:10:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 108 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) [2022-07-22 10:10:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2022-07-22 10:10:28,058 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 75 [2022-07-22 10:10:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:10:28,058 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2022-07-22 10:10:28,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.6557377049180328) internal successors, (202), 122 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:28,059 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2022-07-22 10:10:28,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 10:10:28,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:10:28,059 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:10:28,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 10:10:28,267 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 [2022-07-22 10:10:28,268 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:10:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:10:28,268 INFO L85 PathProgramCache]: Analyzing trace with hash -932406390, now seen corresponding path program 16 times [2022-07-22 10:10:28,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:10:28,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532319287] [2022-07-22 10:10:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:10:28,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:10:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 10:10:28,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:10:28,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532319287] [2022-07-22 10:10:28,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532319287] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:10:28,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972319359] [2022-07-22 10:10:28,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:10:28,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:28,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:10:28,382 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) [2022-07-22 10:10:28,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 10:10:28,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:10:28,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:10:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 10:10:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:10:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 10:10:28,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:10:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 10:10:28,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972319359] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:10:28,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:10:28,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-22 10:10:28,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892219224] [2022-07-22 10:10:28,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:10:28,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 10:10:28,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:10:28,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 10:10:28,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:10:28,696 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:10:28,959 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2022-07-22 10:10:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 10:10:28,960 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2022-07-22 10:10:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:10:28,960 INFO L225 Difference]: With dead ends: 233 [2022-07-22 10:10:28,960 INFO L226 Difference]: Without dead ends: 128 [2022-07-22 10:10:28,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 10:10:28,961 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 229 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:10:28,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 34 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:10:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-22 10:10:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2022-07-22 10:10:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.063063063063063) internal successors, (118), 111 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2022-07-22 10:10:28,975 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 77 [2022-07-22 10:10:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:10:28,975 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2022-07-22 10:10:28,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2022-07-22 10:10:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 10:10:28,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:10:28,976 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:10:29,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 10:10:29,193 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 [2022-07-22 10:10:29,193 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:10:29,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:10:29,193 INFO L85 PathProgramCache]: Analyzing trace with hash -222248596, now seen corresponding path program 17 times [2022-07-22 10:10:29,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:10:29,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015181683] [2022-07-22 10:10:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:10:29,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:10:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:10:29,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:10:29,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015181683] [2022-07-22 10:10:29,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015181683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:10:29,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760313970] [2022-07-22 10:10:29,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:10:29,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:29,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:10:29,306 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) [2022-07-22 10:10:29,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 10:10:29,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-22 10:10:29,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:10:29,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 10:10:29,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:10:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:10:29,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:10:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:10:29,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760313970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:10:29,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:10:29,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-22 10:10:29,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705982106] [2022-07-22 10:10:29,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:10:29,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 10:10:29,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:10:29,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 10:10:29,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:10:29,651 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 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) [2022-07-22 10:10:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:10:29,953 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2022-07-22 10:10:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 10:10:29,953 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 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) Word has length 79 [2022-07-22 10:10:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:10:29,954 INFO L225 Difference]: With dead ends: 122 [2022-07-22 10:10:29,954 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 10:10:29,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 10:10:29,954 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 168 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:10:29,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 27 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:10:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 10:10:29,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-07-22 10:10:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-07-22 10:10:29,964 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 79 [2022-07-22 10:10:29,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:10:29,965 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-07-22 10:10:29,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 26 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) [2022-07-22 10:10:29,965 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-07-22 10:10:29,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 10:10:29,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:10:29,965 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:10:29,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 10:10:30,179 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 [2022-07-22 10:10:30,179 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:10:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:10:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1053375342, now seen corresponding path program 18 times [2022-07-22 10:10:30,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:10:30,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716818094] [2022-07-22 10:10:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:10:30,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:10:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:10:35,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:10:35,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716818094] [2022-07-22 10:10:35,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716818094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:10:35,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834034563] [2022-07-22 10:10:35,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:10:35,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:35,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:10:35,010 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) [2022-07-22 10:10:35,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 10:10:35,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-22 10:10:35,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:10:35,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-22 10:10:35,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:10:35,238 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 [2022-07-22 10:10:41,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:41,515 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:10:41,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 251 [2022-07-22 10:10:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 11 proven. 209 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 10:10:41,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:10:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 10:10:53,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834034563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:10:53,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:10:53,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 38, 33] total 139 [2022-07-22 10:10:53,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625544423] [2022-07-22 10:10:53,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:10:53,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-07-22 10:10:53,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:10:53,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-07-22 10:10:53,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=18236, Unknown=0, NotChecked=0, Total=19182 [2022-07-22 10:10:53,845 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 139 states, 139 states have (on average 1.6330935251798562) internal successors, (227), 139 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:09,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:09,737 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2022-07-22 10:11:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-22 10:11:09,738 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.6330935251798562) internal successors, (227), 139 states have internal predecessors, (227), 0 states have call successors, (0), 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 85 [2022-07-22 10:11:09,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:09,738 INFO L225 Difference]: With dead ends: 141 [2022-07-22 10:11:09,739 INFO L226 Difference]: Without dead ends: 137 [2022-07-22 10:11:09,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 88 SyntacticMatches, 21 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11867 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=2457, Invalid=43125, Unknown=0, NotChecked=0, Total=45582 [2022-07-22 10:11:09,740 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1331 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:09,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 206 Invalid, 3872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2379 Invalid, 0 Unknown, 1331 Unchecked, 1.2s Time] [2022-07-22 10:11:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-22 10:11:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2022-07-22 10:11:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2022-07-22 10:11:09,757 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 85 [2022-07-22 10:11:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:09,758 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2022-07-22 10:11:09,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.6330935251798562) internal successors, (227), 139 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2022-07-22 10:11:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 10:11:09,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:09,758 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:09,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-22 10:11:09,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:09,959 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1371812404, now seen corresponding path program 19 times [2022-07-22 10:11:09,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:09,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238893525] [2022-07-22 10:11:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:09,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-22 10:11:10,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:10,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238893525] [2022-07-22 10:11:10,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238893525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:10,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373377245] [2022-07-22 10:11:10,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:11:10,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:10,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:10,085 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:11:10,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 10:11:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:10,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 10:11:10,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-22 10:11:10,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-22 10:11:10,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373377245] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:10,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:10,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-22 10:11:10,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106385456] [2022-07-22 10:11:10,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:10,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 10:11:10,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:10,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 10:11:10,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-22 10:11:10,408 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:10,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:10,746 INFO L93 Difference]: Finished difference Result 261 states and 276 transitions. [2022-07-22 10:11:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 10:11:10,748 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 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 87 [2022-07-22 10:11:10,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:10,748 INFO L225 Difference]: With dead ends: 261 [2022-07-22 10:11:10,748 INFO L226 Difference]: Without dead ends: 142 [2022-07-22 10:11:10,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 10:11:10,749 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 218 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:10,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 48 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:11:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-22 10:11:10,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 126. [2022-07-22 10:11:10,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.056) internal successors, (132), 125 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2022-07-22 10:11:10,768 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 87 [2022-07-22 10:11:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:10,768 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2022-07-22 10:11:10,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2022-07-22 10:11:10,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-22 10:11:10,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:10,768 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:10,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 10:11:10,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:10,983 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1135498646, now seen corresponding path program 20 times [2022-07-22 10:11:10,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:10,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276701095] [2022-07-22 10:11:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:10,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-22 10:11:11,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:11,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276701095] [2022-07-22 10:11:11,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276701095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:11,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125453816] [2022-07-22 10:11:11,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:11:11,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:11,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:11,123 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:11:11,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 10:11:11,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:11:11,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:11:11,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 10:11:11,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-22 10:11:11,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-22 10:11:11,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125453816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:11,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:11,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-22 10:11:11,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115480648] [2022-07-22 10:11:11,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:11,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 10:11:11,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:11,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 10:11:11,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-22 10:11:11,444 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:11,827 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2022-07-22 10:11:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 10:11:11,827 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 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 [2022-07-22 10:11:11,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:11,828 INFO L225 Difference]: With dead ends: 136 [2022-07-22 10:11:11,828 INFO L226 Difference]: Without dead ends: 100 [2022-07-22 10:11:11,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 10:11:11,828 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 167 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:11,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 29 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:11:11,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-22 10:11:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-07-22 10:11:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-07-22 10:11:11,842 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2022-07-22 10:11:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:11,842 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-07-22 10:11:11,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-07-22 10:11:11,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 10:11:11,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:11,843 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:11,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 10:11:12,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-22 10:11:12,043 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash 238506300, now seen corresponding path program 21 times [2022-07-22 10:11:12,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:12,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161421374] [2022-07-22 10:11:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:12,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:11:19,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:19,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161421374] [2022-07-22 10:11:19,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161421374] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:19,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062836604] [2022-07-22 10:11:19,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:11:19,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:19,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:19,171 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:11:19,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 10:11:19,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 10:11:19,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:11:19,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 158 conjunts are in the unsatisfiable core [2022-07-22 10:11:19,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:19,455 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 [2022-07-22 10:11:26,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:11:26,264 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:11:26,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 169 [2022-07-22 10:11:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 9 proven. 295 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 10:11:26,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-22 10:11:47,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062836604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:47,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:47,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 44, 37] total 159 [2022-07-22 10:11:47,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784822707] [2022-07-22 10:11:47,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:47,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-07-22 10:11:47,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-07-22 10:11:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=24103, Unknown=0, NotChecked=0, Total=25122 [2022-07-22 10:11:47,803 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 159 states, 159 states have (on average 1.610062893081761) internal successors, (256), 159 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:06,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:12:06,875 INFO L93 Difference]: Finished difference Result 157 states and 164 transitions. [2022-07-22 10:12:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-22 10:12:06,876 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.610062893081761) internal successors, (256), 159 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-07-22 10:12:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:12:06,876 INFO L225 Difference]: With dead ends: 157 [2022-07-22 10:12:06,876 INFO L226 Difference]: Without dead ends: 153 [2022-07-22 10:12:06,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 97 SyntacticMatches, 23 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14089 ImplicationChecksByTransitivity, 49.1s TimeCoverageRelationStatistics Valid=2737, Invalid=56069, Unknown=0, NotChecked=0, Total=58806 [2022-07-22 10:12:06,879 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2798 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 4683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1705 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:12:06,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 189 Invalid, 4683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2798 Invalid, 0 Unknown, 1705 Unchecked, 1.4s Time] [2022-07-22 10:12:06,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-22 10:12:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2022-07-22 10:12:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 136 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2022-07-22 10:12:06,901 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 95 [2022-07-22 10:12:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:12:06,901 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2022-07-22 10:12:06,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.610062893081761) internal successors, (256), 159 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2022-07-22 10:12:06,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 10:12:06,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:12:06,902 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:12:06,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 10:12:07,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 10:12:07,103 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:12:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:12:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1624521822, now seen corresponding path program 22 times [2022-07-22 10:12:07,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:12:07,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562302824] [2022-07-22 10:12:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:12:07,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:12:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:12:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-22 10:12:07,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:12:07,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562302824] [2022-07-22 10:12:07,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562302824] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:12:07,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889472834] [2022-07-22 10:12:07,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:12:07,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:12:07,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:12:07,249 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:12:07,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 10:12:07,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:12:07,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:12:07,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 10:12:07,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:12:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-22 10:12:07,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:12:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-22 10:12:07,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889472834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:12:07,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:12:07,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-22 10:12:07,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676210813] [2022-07-22 10:12:07,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:12:07,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 10:12:07,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:12:07,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 10:12:07,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-07-22 10:12:07,617 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:12:07,966 INFO L93 Difference]: Finished difference Result 289 states and 304 transitions. [2022-07-22 10:12:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 10:12:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 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 97 [2022-07-22 10:12:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:12:07,967 INFO L225 Difference]: With dead ends: 289 [2022-07-22 10:12:07,967 INFO L226 Difference]: Without dead ends: 156 [2022-07-22 10:12:07,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 10:12:07,968 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 251 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:12:07,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 46 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:12:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-22 10:12:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2022-07-22 10:12:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 139 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 146 transitions. [2022-07-22 10:12:07,994 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 146 transitions. Word has length 97 [2022-07-22 10:12:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:12:07,994 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 146 transitions. [2022-07-22 10:12:07,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:12:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 146 transitions. [2022-07-22 10:12:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 10:12:07,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:12:07,995 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:12:08,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-22 10:12:08,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:12:08,196 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:12:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:12:08,196 INFO L85 PathProgramCache]: Analyzing trace with hash 55934272, now seen corresponding path program 23 times [2022-07-22 10:12:08,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:12:08,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264162588] [2022-07-22 10:12:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:12:08,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:12:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:12:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-22 10:12:08,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:12:08,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264162588] [2022-07-22 10:12:08,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264162588] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:12:08,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470078190] [2022-07-22 10:12:08,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:12:08,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:12:08,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:12:08,337 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:12:08,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 10:12:08,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-22 10:12:08,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:12:08,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 10:12:08,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:12:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-22 10:12:08,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:12:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-22 10:12:08,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470078190] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:12:08,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:12:08,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-22 10:12:08,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409413198] [2022-07-22 10:12:08,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:12:08,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 10:12:08,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:12:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 10:12:08,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-07-22 10:12:08,924 INFO L87 Difference]: Start difference. First operand 140 states and 146 transitions. Second operand has 32 states, 32 states have (on average 3.0625) internal successors, (98), 32 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) [2022-07-22 10:12:09,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:12:09,310 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2022-07-22 10:12:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 10:12:09,311 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0625) internal successors, (98), 32 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 99 [2022-07-22 10:12:09,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:12:09,311 INFO L225 Difference]: With dead ends: 150 [2022-07-22 10:12:09,311 INFO L226 Difference]: Without dead ends: 110 [2022-07-22 10:12:09,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=539, Invalid=1911, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 10:12:09,312 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 230 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:12:09,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 23 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:12:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-22 10:12:09,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2022-07-22 10:12:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 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) [2022-07-22 10:12:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-07-22 10:12:09,330 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 99 [2022-07-22 10:12:09,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:12:09,330 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-07-22 10:12:09,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.0625) internal successors, (98), 32 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) [2022-07-22 10:12:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-07-22 10:12:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-22 10:12:09,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:12:09,331 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:12:09,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-22 10:12:09,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:12:09,531 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:12:09,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:12:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1992502938, now seen corresponding path program 24 times [2022-07-22 10:12:09,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:12:09,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200714426] [2022-07-22 10:12:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:12:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:12:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:12:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 36 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:12:17,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:12:17,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200714426] [2022-07-22 10:12:17,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200714426] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:12:17,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563346918] [2022-07-22 10:12:17,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:12:17,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:12:17,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:12:17,598 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:12:17,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 10:12:17,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-22 10:12:17,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:12:17,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 181 conjunts are in the unsatisfiable core [2022-07-22 10:12:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:12:18,138 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 [2022-07-22 10:12:18,242 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 [2022-07-22 10:12:18,330 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 [2022-07-22 10:12:25,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:25,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:25,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:25,348 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:12:25,348 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 36 treesize of output 51 [2022-07-22 10:12:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 2 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:12:25,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:12:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 10:12:48,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563346918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:12:48,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:12:48,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 55, 41] total 183 [2022-07-22 10:12:48,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653019541] [2022-07-22 10:12:48,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:12:48,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-07-22 10:12:48,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:12:48,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-07-22 10:12:48,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2466, Invalid=30840, Unknown=0, NotChecked=0, Total=33306 [2022-07-22 10:12:48,400 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 183 states, 183 states have (on average 1.5846994535519126) internal successors, (290), 183 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:13,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:13,540 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2022-07-22 10:13:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-22 10:13:13,541 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.5846994535519126) internal successors, (290), 183 states have internal predecessors, (290), 0 states have call successors, (0), 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 [2022-07-22 10:13:13,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:13,542 INFO L225 Difference]: With dead ends: 173 [2022-07-22 10:13:13,542 INFO L226 Difference]: Without dead ends: 169 [2022-07-22 10:13:13,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 100 SyntacticMatches, 26 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28851 ImplicationChecksByTransitivity, 56.7s TimeCoverageRelationStatistics Valid=5693, Invalid=75245, Unknown=2, NotChecked=0, Total=80940 [2022-07-22 10:13:13,545 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3105 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 5691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 3105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2326 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:13,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 201 Invalid, 5691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 3105 Invalid, 0 Unknown, 2326 Unchecked, 1.8s Time] [2022-07-22 10:13:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-22 10:13:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 151. [2022-07-22 10:13:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0533333333333332) internal successors, (158), 150 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2022-07-22 10:13:13,573 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 105 [2022-07-22 10:13:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:13,573 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2022-07-22 10:13:13,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.5846994535519126) internal successors, (290), 183 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2022-07-22 10:13:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-22 10:13:13,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:13,574 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:13,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-22 10:13:13,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 10:13:13,787 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash 813324808, now seen corresponding path program 25 times [2022-07-22 10:13:13,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:13,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252836511] [2022-07-22 10:13:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:13,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-22 10:13:13,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:13:13,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252836511] [2022-07-22 10:13:13,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252836511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:13:13,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131781107] [2022-07-22 10:13:13,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:13:13,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:13,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:13,960 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:13:13,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 10:13:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 10:13:14,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:13:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-22 10:13:14,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:13:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-22 10:13:14,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131781107] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:13:14,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:13:14,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-07-22 10:13:14,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60261227] [2022-07-22 10:13:14,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:13:14,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 10:13:14,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:13:14,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 10:13:14,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 10:13:14,390 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:14,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:14,835 INFO L93 Difference]: Finished difference Result 317 states and 332 transitions. [2022-07-22 10:13:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 10:13:14,836 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 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 107 [2022-07-22 10:13:14,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:14,836 INFO L225 Difference]: With dead ends: 317 [2022-07-22 10:13:14,837 INFO L226 Difference]: Without dead ends: 170 [2022-07-22 10:13:14,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 10:13:14,837 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 446 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:14,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 31 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:13:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-22 10:13:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2022-07-22 10:13:14,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0457516339869282) internal successors, (160), 153 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) [2022-07-22 10:13:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2022-07-22 10:13:14,870 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 107 [2022-07-22 10:13:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:14,870 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2022-07-22 10:13:14,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2022-07-22 10:13:14,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-22 10:13:14,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:14,871 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:14,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-22 10:13:15,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 10:13:15,072 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:15,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1280583574, now seen corresponding path program 26 times [2022-07-22 10:13:15,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:15,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345681346] [2022-07-22 10:13:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:15,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-07-22 10:13:15,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:13:15,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345681346] [2022-07-22 10:13:15,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345681346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:13:15,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240070787] [2022-07-22 10:13:15,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:13:15,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:15,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:15,256 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:13:15,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 10:13:15,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:13:15,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:13:15,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 10:13:15,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:13:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-07-22 10:13:15,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:13:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-07-22 10:13:15,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240070787] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:13:15,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:13:15,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-07-22 10:13:15,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241848524] [2022-07-22 10:13:15,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:13:15,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 10:13:15,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:13:15,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 10:13:15,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 10:13:15,637 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:16,123 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2022-07-22 10:13:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 10:13:16,123 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 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 [2022-07-22 10:13:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:16,124 INFO L225 Difference]: With dead ends: 164 [2022-07-22 10:13:16,124 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 10:13:16,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=647, Invalid=2323, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 10:13:16,125 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 332 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:16,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 24 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:13:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 10:13:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2022-07-22 10:13:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-07-22 10:13:16,147 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2022-07-22 10:13:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:16,147 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-07-22 10:13:16,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:13:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-07-22 10:13:16,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-22 10:13:16,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:16,148 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:16,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-22 10:13:16,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-22 10:13:16,349 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash 931456272, now seen corresponding path program 27 times [2022-07-22 10:13:16,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:16,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150925174] [2022-07-22 10:13:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:16,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat