./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/up.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/loop-invgen/up.i -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 ff5c10c83c8d29dcc2c2798035fa2754df224d2313ad9c91b6ee5bb6ca3d9a9f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:40:34,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:40:34,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:40:34,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:40:34,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:40:34,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:40:34,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:40:34,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:40:34,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:40:34,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:40:34,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:40:34,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:40:34,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:40:34,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:40:34,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:40:34,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:40:34,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:40:34,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:40:34,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:40:34,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:40:34,422 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:40:34,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:40:34,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:40:34,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:40:34,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:40:34,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:40:34,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:40:34,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:40:34,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:40:34,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:40:34,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:40:34,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:40:34,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:40:34,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:40:34,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:40:34,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:40:34,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:40:34,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:40:34,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:40:34,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:40:34,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:40:34,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:40:34,443 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:40:34,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:40:34,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:40:34,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:40:34,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:40:34,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:40:34,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:40:34,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:40:34,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:40:34,478 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:40:34,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:40:34,478 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:40:34,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:40:34,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:40:34,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:40:34,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:40:34,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:40:34,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:40:34,480 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:40:34,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:40:34,480 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:40:34,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:40:34,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:40:34,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:40:34,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:40:34,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:40:34,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:40:34,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:40:34,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:40:34,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:40:34,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:40:34,482 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:40:34,482 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:40:34,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:40:34,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5c10c83c8d29dcc2c2798035fa2754df224d2313ad9c91b6ee5bb6ca3d9a9f [2022-07-21 02:40:34,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:40:34,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:40:34,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:40:34,742 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:40:34,742 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:40:34,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/up.i [2022-07-21 02:40:34,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9b11c5b4/a55441c789434716951c6759320d08b1/FLAG4db69f1fc [2022-07-21 02:40:35,174 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:40:35,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/up.i [2022-07-21 02:40:35,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9b11c5b4/a55441c789434716951c6759320d08b1/FLAG4db69f1fc [2022-07-21 02:40:35,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9b11c5b4/a55441c789434716951c6759320d08b1 [2022-07-21 02:40:35,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:40:35,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:40:35,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:40:35,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:40:35,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:40:35,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bfe8cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35, skipping insertion in model container [2022-07-21 02:40:35,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:40:35,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:40:35,333 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/loop-invgen/up.i[893,906] [2022-07-21 02:40:35,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:40:35,372 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:40:35,410 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/loop-invgen/up.i[893,906] [2022-07-21 02:40:35,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:40:35,424 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:40:35,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35 WrapperNode [2022-07-21 02:40:35,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:40:35,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:40:35,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:40:35,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:40:35,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,448 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2022-07-21 02:40:35,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:40:35,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:40:35,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:40:35,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:40:35,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:40:35,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:40:35,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:40:35,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:40:35,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35" (1/1) ... [2022-07-21 02:40:35,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:40:35,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:35,496 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) [2022-07-21 02:40:35,540 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 [2022-07-21 02:40:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:40:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:40:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:40:35,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:40:35,596 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:40:35,597 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:40:35,668 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:40:35,672 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:40:35,672 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 02:40:35,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:40:35 BoogieIcfgContainer [2022-07-21 02:40:35,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:40:35,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:40:35,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:40:35,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:40:35,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:40:35" (1/3) ... [2022-07-21 02:40:35,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598e69dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:40:35, skipping insertion in model container [2022-07-21 02:40:35,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:40:35" (2/3) ... [2022-07-21 02:40:35,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598e69dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:40:35, skipping insertion in model container [2022-07-21 02:40:35,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:40:35" (3/3) ... [2022-07-21 02:40:35,679 INFO L111 eAbstractionObserver]: Analyzing ICFG up.i [2022-07-21 02:40:35,696 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:40:35,696 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:40:35,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:40:35,746 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@601b1244, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e1eccc5 [2022-07-21 02:40:35,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:40:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 02:40:35,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:35,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:35,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:35,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2022-07-21 02:40:35,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:35,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444520052] [2022-07-21 02:40:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:35,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:35,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:35,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444520052] [2022-07-21 02:40:35,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444520052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:40:35,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:40:35,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 02:40:35,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503301859] [2022-07-21 02:40:35,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:40:35,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 02:40:35,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:35,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 02:40:35,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 02:40:35,995 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:36,042 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-07-21 02:40:36,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 02:40:36,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-07-21 02:40:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:36,064 INFO L225 Difference]: With dead ends: 27 [2022-07-21 02:40:36,064 INFO L226 Difference]: Without dead ends: 10 [2022-07-21 02:40:36,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:40:36,073 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:36,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-21 02:40:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-07-21 02:40:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-21 02:40:36,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2022-07-21 02:40:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:36,101 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-21 02:40:36,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-21 02:40:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 02:40:36,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:36,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:36,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:40:36,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:36,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:36,102 INFO L85 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2022-07-21 02:40:36,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:36,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276059187] [2022-07-21 02:40:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:36,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:36,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276059187] [2022-07-21 02:40:36,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276059187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372220858] [2022-07-21 02:40:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:36,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:36,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:36,154 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) [2022-07-21 02:40:36,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:40:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:36,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 02:40:36,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:36,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:40:36,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372220858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:40:36,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:40:36,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-07-21 02:40:36,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189584645] [2022-07-21 02:40:36,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:40:36,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 02:40:36,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:36,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 02:40:36,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:40:36,259 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:36,313 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-07-21 02:40:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 02:40:36,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-07-21 02:40:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:36,314 INFO L225 Difference]: With dead ends: 20 [2022-07-21 02:40:36,314 INFO L226 Difference]: Without dead ends: 18 [2022-07-21 02:40:36,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:40:36,315 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:36,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-21 02:40:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2022-07-21 02:40:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-07-21 02:40:36,320 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2022-07-21 02:40:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:36,320 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-07-21 02:40:36,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-07-21 02:40:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 02:40:36,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:36,321 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:36,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:36,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:36,528 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2022-07-21 02:40:36,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:36,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305636335] [2022-07-21 02:40:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:36,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:36,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305636335] [2022-07-21 02:40:36,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305636335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914028180] [2022-07-21 02:40:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:36,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:36,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:36,580 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) [2022-07-21 02:40:36,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 02:40:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:36,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 02:40:36,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:36,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:36,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914028180] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:36,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:36,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-21 02:40:36,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869802620] [2022-07-21 02:40:36,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:36,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 02:40:36,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:36,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 02:40:36,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-21 02:40:36,713 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:36,771 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-07-21 02:40:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 02:40:36,771 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 02:40:36,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:36,772 INFO L225 Difference]: With dead ends: 23 [2022-07-21 02:40:36,772 INFO L226 Difference]: Without dead ends: 13 [2022-07-21 02:40:36,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:40:36,773 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:36,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 33 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-21 02:40:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-07-21 02:40:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-07-21 02:40:36,775 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-07-21 02:40:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:36,776 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-07-21 02:40:36,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-07-21 02:40:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 02:40:36,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:36,776 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:36,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 02:40:36,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-21 02:40:36,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:36,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:36,988 INFO L85 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2022-07-21 02:40:36,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:36,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608195239] [2022-07-21 02:40:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:36,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:37,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:37,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608195239] [2022-07-21 02:40:37,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608195239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:37,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087881361] [2022-07-21 02:40:37,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:40:37,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:37,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:37,037 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) [2022-07-21 02:40:37,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 02:40:37,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:40:37,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:37,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 02:40:37,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:37,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:37,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087881361] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:37,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:37,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-07-21 02:40:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053850585] [2022-07-21 02:40:37,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:37,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 02:40:37,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:37,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 02:40:37,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:40:37,123 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:37,179 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-07-21 02:40:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 02:40:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 12 [2022-07-21 02:40:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:37,182 INFO L225 Difference]: With dead ends: 24 [2022-07-21 02:40:37,182 INFO L226 Difference]: Without dead ends: 22 [2022-07-21 02:40:37,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-21 02:40:37,187 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:37,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:37,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-21 02:40:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2022-07-21 02:40:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2022-07-21 02:40:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-07-21 02:40:37,194 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2022-07-21 02:40:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:37,195 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-07-21 02:40:37,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-07-21 02:40:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 02:40:37,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:37,199 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:37,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:37,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:37,416 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2022-07-21 02:40:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:37,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103841038] [2022-07-21 02:40:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:37,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103841038] [2022-07-21 02:40:37,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103841038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:37,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468440581] [2022-07-21 02:40:37,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:40:37,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:37,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:37,516 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) [2022-07-21 02:40:37,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 02:40:37,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 02:40:37,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 02:40:37,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:37,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:37,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468440581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:37,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:37,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-21 02:40:37,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104145792] [2022-07-21 02:40:37,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:37,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 02:40:37,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:37,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 02:40:37,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:40:37,655 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:37,706 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-07-21 02:40:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 02:40:37,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2022-07-21 02:40:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:37,706 INFO L225 Difference]: With dead ends: 30 [2022-07-21 02:40:37,706 INFO L226 Difference]: Without dead ends: 17 [2022-07-21 02:40:37,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-21 02:40:37,707 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:37,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-21 02:40:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-21 02:40:37,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-07-21 02:40:37,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2022-07-21 02:40:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:37,710 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-07-21 02:40:37,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-07-21 02:40:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 02:40:37,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:37,710 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:37,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:37,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:37,918 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:37,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:37,919 INFO L85 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2022-07-21 02:40:37,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:37,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528860091] [2022-07-21 02:40:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:37,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:37,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:37,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528860091] [2022-07-21 02:40:37,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528860091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:37,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015420000] [2022-07-21 02:40:37,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:40:37,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:37,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:37,970 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) [2022-07-21 02:40:37,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 02:40:38,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:40:38,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:38,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 02:40:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:38,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:38,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015420000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:38,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:38,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-07-21 02:40:38,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696397140] [2022-07-21 02:40:38,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:38,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 02:40:38,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:38,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 02:40:38,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:40:38,114 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:38,174 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-07-21 02:40:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 02:40:38,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 16 [2022-07-21 02:40:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:38,176 INFO L225 Difference]: With dead ends: 28 [2022-07-21 02:40:38,176 INFO L226 Difference]: Without dead ends: 26 [2022-07-21 02:40:38,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:40:38,178 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:38,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-21 02:40:38,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2022-07-21 02:40:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-07-21 02:40:38,185 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2022-07-21 02:40:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:38,185 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-07-21 02:40:38,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:38,187 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-07-21 02:40:38,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 02:40:38,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:38,188 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:38,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 02:40:38,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:38,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:38,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2022-07-21 02:40:38,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:38,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121132162] [2022-07-21 02:40:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:38,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:38,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:38,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121132162] [2022-07-21 02:40:38,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121132162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:38,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902399562] [2022-07-21 02:40:38,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:40:38,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:38,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:38,497 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) [2022-07-21 02:40:38,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 02:40:38,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 02:40:38,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 02:40:38,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:38,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:38,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902399562] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:38,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:38,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-21 02:40:38,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218681396] [2022-07-21 02:40:38,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:38,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 02:40:38,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:38,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 02:40:38,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:40:38,667 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:38,733 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-07-21 02:40:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 02:40:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-21 02:40:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:38,733 INFO L225 Difference]: With dead ends: 37 [2022-07-21 02:40:38,733 INFO L226 Difference]: Without dead ends: 21 [2022-07-21 02:40:38,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-07-21 02:40:38,734 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:38,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 45 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-21 02:40:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-21 02:40:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-07-21 02:40:38,737 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2022-07-21 02:40:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:38,737 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-07-21 02:40:38,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-07-21 02:40:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 02:40:38,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:38,737 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:38,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:38,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:38,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:38,938 INFO L85 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2022-07-21 02:40:38,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:38,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625766128] [2022-07-21 02:40:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:38,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:38,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:38,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625766128] [2022-07-21 02:40:38,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625766128] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:38,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394556885] [2022-07-21 02:40:38,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:40:38,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:38,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:38,998 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) [2022-07-21 02:40:38,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 02:40:39,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 02:40:39,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:39,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 02:40:39,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:39,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:39,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394556885] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:39,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:39,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2022-07-21 02:40:39,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123699174] [2022-07-21 02:40:39,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:39,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 02:40:39,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:39,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 02:40:39,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-21 02:40:39,120 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:39,176 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-07-21 02:40:39,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 02:40:39,176 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 20 [2022-07-21 02:40:39,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:39,177 INFO L225 Difference]: With dead ends: 32 [2022-07-21 02:40:39,177 INFO L226 Difference]: Without dead ends: 30 [2022-07-21 02:40:39,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-07-21 02:40:39,178 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:39,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 23 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:39,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-21 02:40:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-07-21 02:40:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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) [2022-07-21 02:40:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-07-21 02:40:39,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2022-07-21 02:40:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:39,184 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-07-21 02:40:39,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-07-21 02:40:39,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 02:40:39,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:39,186 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:39,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:39,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:39,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:39,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2022-07-21 02:40:39,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:39,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767936108] [2022-07-21 02:40:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:39,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:39,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:39,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767936108] [2022-07-21 02:40:39,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767936108] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:39,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854815990] [2022-07-21 02:40:39,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:40:39,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:39,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:39,486 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) [2022-07-21 02:40:39,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 02:40:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:39,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 02:40:39,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:39,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:39,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854815990] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:39,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:39,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-21 02:40:39,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769919110] [2022-07-21 02:40:39,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:39,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 02:40:39,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:39,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 02:40:39,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-07-21 02:40:39,649 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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) [2022-07-21 02:40:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:39,718 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-07-21 02:40:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 02:40:39,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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 23 [2022-07-21 02:40:39,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:39,718 INFO L225 Difference]: With dead ends: 44 [2022-07-21 02:40:39,718 INFO L226 Difference]: Without dead ends: 25 [2022-07-21 02:40:39,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-07-21 02:40:39,719 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:39,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 66 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-21 02:40:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-21 02:40:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 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) [2022-07-21 02:40:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-07-21 02:40:39,722 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2022-07-21 02:40:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:39,722 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-07-21 02:40:39,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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) [2022-07-21 02:40:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-07-21 02:40:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 02:40:39,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:39,723 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:39,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:39,923 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,SelfDestructingSolverStorable8 [2022-07-21 02:40:39,923 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:39,924 INFO L85 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2022-07-21 02:40:39,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:39,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444566581] [2022-07-21 02:40:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:39,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:39,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:39,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444566581] [2022-07-21 02:40:39,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444566581] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:39,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269145966] [2022-07-21 02:40:39,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:40:39,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:39,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:39,985 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) [2022-07-21 02:40:39,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 02:40:40,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:40:40,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:40,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 02:40:40,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:40,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:40,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269145966] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:40,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:40,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-21 02:40:40,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961294467] [2022-07-21 02:40:40,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:40,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 02:40:40,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:40,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 02:40:40,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-21 02:40:40,088 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:40,158 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-07-21 02:40:40,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 02:40:40,159 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2022-07-21 02:40:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:40,159 INFO L225 Difference]: With dead ends: 36 [2022-07-21 02:40:40,159 INFO L226 Difference]: Without dead ends: 34 [2022-07-21 02:40:40,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-07-21 02:40:40,160 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:40,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:40,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-21 02:40:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-07-21 02:40:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-07-21 02:40:40,165 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2022-07-21 02:40:40,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:40,165 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-07-21 02:40:40,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-07-21 02:40:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 02:40:40,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:40,166 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:40,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:40,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 02:40:40,385 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:40,386 INFO L85 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2022-07-21 02:40:40,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:40,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104771813] [2022-07-21 02:40:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:40,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:40,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:40,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104771813] [2022-07-21 02:40:40,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104771813] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:40,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607117923] [2022-07-21 02:40:40,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:40:40,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:40,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:40,479 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) [2022-07-21 02:40:40,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 02:40:40,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 02:40:40,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:40,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 02:40:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:40,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:40,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607117923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:40,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:40,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-21 02:40:40,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677499195] [2022-07-21 02:40:40,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:40,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 02:40:40,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:40,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 02:40:40,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-07-21 02:40:40,657 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2022-07-21 02:40:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:40,747 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-07-21 02:40:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 02:40:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) Word has length 27 [2022-07-21 02:40:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:40,749 INFO L225 Difference]: With dead ends: 51 [2022-07-21 02:40:40,749 INFO L226 Difference]: Without dead ends: 29 [2022-07-21 02:40:40,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-07-21 02:40:40,750 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:40,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-21 02:40:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-21 02:40:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) [2022-07-21 02:40:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-07-21 02:40:40,758 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2022-07-21 02:40:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:40,758 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-07-21 02:40:40,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2022-07-21 02:40:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-07-21 02:40:40,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 02:40:40,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:40,760 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:40,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:40,975 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,SelfDestructingSolverStorable10 [2022-07-21 02:40:40,976 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2022-07-21 02:40:40,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:40,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018632127] [2022-07-21 02:40:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:41,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:41,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018632127] [2022-07-21 02:40:41,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018632127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:41,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067685722] [2022-07-21 02:40:41,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:40:41,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:41,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:41,039 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) [2022-07-21 02:40:41,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 02:40:41,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:40:41,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:41,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 02:40:41,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:41,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:41,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067685722] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:41,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:41,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-21 02:40:41,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932401065] [2022-07-21 02:40:41,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:41,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 02:40:41,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 02:40:41,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-07-21 02:40:41,160 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2022-07-21 02:40:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:41,230 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-07-21 02:40:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 02:40:41,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 28 [2022-07-21 02:40:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:41,231 INFO L225 Difference]: With dead ends: 40 [2022-07-21 02:40:41,231 INFO L226 Difference]: Without dead ends: 38 [2022-07-21 02:40:41,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-07-21 02:40:41,231 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:41,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-21 02:40:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-07-21 02:40:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-07-21 02:40:41,235 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2022-07-21 02:40:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:41,235 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-07-21 02:40:41,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2022-07-21 02:40:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-07-21 02:40:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 02:40:41,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:41,235 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:41,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:41,436 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,SelfDestructingSolverStorable11 [2022-07-21 02:40:41,436 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:41,436 INFO L85 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2022-07-21 02:40:41,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:41,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562825992] [2022-07-21 02:40:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:41,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:41,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:41,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562825992] [2022-07-21 02:40:41,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562825992] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:41,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341567792] [2022-07-21 02:40:41,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:40:41,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:41,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:41,557 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) [2022-07-21 02:40:41,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 02:40:41,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 02:40:41,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:41,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 02:40:41,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:41,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:41,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341567792] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:41,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:41,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-21 02:40:41,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205756439] [2022-07-21 02:40:41,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:41,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 02:40:41,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:41,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 02:40:41,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-07-21 02:40:41,822 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:41,933 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-07-21 02:40:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 02:40:41,933 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-21 02:40:41,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:41,933 INFO L225 Difference]: With dead ends: 58 [2022-07-21 02:40:41,933 INFO L226 Difference]: Without dead ends: 33 [2022-07-21 02:40:41,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 02:40:41,934 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:41,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 74 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-21 02:40:41,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-21 02:40:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-07-21 02:40:41,937 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2022-07-21 02:40:41,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:41,937 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-07-21 02:40:41,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-07-21 02:40:41,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 02:40:41,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:41,938 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:41,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:42,138 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,SelfDestructingSolverStorable12 [2022-07-21 02:40:42,138 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:42,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:42,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2022-07-21 02:40:42,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:42,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382110362] [2022-07-21 02:40:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:42,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:42,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:42,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382110362] [2022-07-21 02:40:42,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382110362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:42,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025660532] [2022-07-21 02:40:42,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:40:42,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:42,197 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) [2022-07-21 02:40:42,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 02:40:42,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-21 02:40:42,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:42,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 02:40:42,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:42,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:42,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025660532] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:42,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:42,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-07-21 02:40:42,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052719700] [2022-07-21 02:40:42,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:42,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 02:40:42,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 02:40:42,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-21 02:40:42,323 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:42,417 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2022-07-21 02:40:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 02:40:42,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 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 32 [2022-07-21 02:40:42,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:42,418 INFO L225 Difference]: With dead ends: 44 [2022-07-21 02:40:42,419 INFO L226 Difference]: Without dead ends: 42 [2022-07-21 02:40:42,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2022-07-21 02:40:42,419 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:42,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 27 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-21 02:40:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-07-21 02:40:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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) [2022-07-21 02:40:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-07-21 02:40:42,423 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2022-07-21 02:40:42,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:42,423 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-07-21 02:40:42,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-07-21 02:40:42,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 02:40:42,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:42,424 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:42,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:42,633 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,SelfDestructingSolverStorable13 [2022-07-21 02:40:42,633 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:42,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2022-07-21 02:40:42,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:42,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354577586] [2022-07-21 02:40:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:42,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:42,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354577586] [2022-07-21 02:40:42,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354577586] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729106651] [2022-07-21 02:40:42,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:40:42,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:42,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:42,760 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) [2022-07-21 02:40:42,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 02:40:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:42,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 02:40:42,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:42,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:43,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729106651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:43,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:43,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-21 02:40:43,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995453238] [2022-07-21 02:40:43,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:43,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 02:40:43,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:43,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 02:40:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2022-07-21 02:40:43,041 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:43,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:43,162 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2022-07-21 02:40:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 02:40:43,162 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 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 [2022-07-21 02:40:43,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:43,163 INFO L225 Difference]: With dead ends: 65 [2022-07-21 02:40:43,163 INFO L226 Difference]: Without dead ends: 37 [2022-07-21 02:40:43,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 02:40:43,164 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:43,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-21 02:40:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-21 02:40:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-07-21 02:40:43,168 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2022-07-21 02:40:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:43,168 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-07-21 02:40:43,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-07-21 02:40:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 02:40:43,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:43,169 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:43,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:43,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:43,382 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:43,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2022-07-21 02:40:43,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:43,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940600642] [2022-07-21 02:40:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:43,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:43,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:43,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940600642] [2022-07-21 02:40:43,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940600642] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:43,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659985502] [2022-07-21 02:40:43,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:40:43,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:43,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:43,461 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) [2022-07-21 02:40:43,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 02:40:43,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:40:43,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:43,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 02:40:43,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:43,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:43,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659985502] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:43,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:43,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-07-21 02:40:43,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236095787] [2022-07-21 02:40:43,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:43,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 02:40:43,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:43,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 02:40:43,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:40:43,585 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2022-07-21 02:40:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:43,689 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-07-21 02:40:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 02:40:43,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-21 02:40:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:43,690 INFO L225 Difference]: With dead ends: 48 [2022-07-21 02:40:43,690 INFO L226 Difference]: Without dead ends: 46 [2022-07-21 02:40:43,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2022-07-21 02:40:43,690 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:43,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 32 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:43,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-21 02:40:43,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-07-21 02:40:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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) [2022-07-21 02:40:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-07-21 02:40:43,694 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2022-07-21 02:40:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:43,694 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-07-21 02:40:43,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2022-07-21 02:40:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-07-21 02:40:43,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 02:40:43,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:43,695 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:43,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:43,911 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,SelfDestructingSolverStorable15 [2022-07-21 02:40:43,912 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2022-07-21 02:40:43,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:43,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710300508] [2022-07-21 02:40:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:43,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:44,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:44,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710300508] [2022-07-21 02:40:44,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710300508] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:44,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691799003] [2022-07-21 02:40:44,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:40:44,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:44,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:44,104 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) [2022-07-21 02:40:44,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 02:40:44,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-21 02:40:44,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:44,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 02:40:44,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:44,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:44,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691799003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:44,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:44,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-21 02:40:44,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095877154] [2022-07-21 02:40:44,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:44,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 02:40:44,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:44,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 02:40:44,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2022-07-21 02:40:44,415 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:44,547 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-07-21 02:40:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 02:40:44,547 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2022-07-21 02:40:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:44,548 INFO L225 Difference]: With dead ends: 72 [2022-07-21 02:40:44,548 INFO L226 Difference]: Without dead ends: 41 [2022-07-21 02:40:44,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=1319, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 02:40:44,549 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:44,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 88 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:40:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-21 02:40:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-21 02:40:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-07-21 02:40:44,552 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2022-07-21 02:40:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:44,552 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-07-21 02:40:44,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-07-21 02:40:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 02:40:44,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:44,553 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:44,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:44,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 02:40:44,767 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:44,768 INFO L85 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2022-07-21 02:40:44,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:44,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688400253] [2022-07-21 02:40:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:44,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:44,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:44,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688400253] [2022-07-21 02:40:44,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688400253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:44,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219562944] [2022-07-21 02:40:44,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:40:44,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:44,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:44,841 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) [2022-07-21 02:40:44,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 02:40:44,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:40:44,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:44,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 02:40:44,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:44,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:44,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219562944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:44,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:44,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2022-07-21 02:40:44,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670819367] [2022-07-21 02:40:44,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:44,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 02:40:44,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:44,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 02:40:44,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-21 02:40:44,989 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:45,117 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-07-21 02:40:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 02:40:45,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 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 40 [2022-07-21 02:40:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:45,118 INFO L225 Difference]: With dead ends: 52 [2022-07-21 02:40:45,118 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 02:40:45,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2022-07-21 02:40:45,119 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:45,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 26 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 02:40:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-07-21 02:40:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-07-21 02:40:45,126 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2022-07-21 02:40:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:45,126 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-07-21 02:40:45,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-07-21 02:40:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 02:40:45,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:45,127 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:45,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:45,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 02:40:45,341 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2022-07-21 02:40:45,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:45,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894972879] [2022-07-21 02:40:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:45,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:45,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:45,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894972879] [2022-07-21 02:40:45,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894972879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:45,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948482794] [2022-07-21 02:40:45,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:40:45,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:45,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:45,498 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) [2022-07-21 02:40:45,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 02:40:45,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-21 02:40:45,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:45,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 02:40:45,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:45,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:45,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948482794] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:45,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:45,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-07-21 02:40:45,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429822997] [2022-07-21 02:40:45,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:45,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 02:40:45,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 02:40:45,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 02:40:45,875 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:46,056 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-07-21 02:40:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 02:40:46,056 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 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 43 [2022-07-21 02:40:46,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:46,057 INFO L225 Difference]: With dead ends: 79 [2022-07-21 02:40:46,057 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 02:40:46,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=481, Invalid=1589, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 02:40:46,058 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:46,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 126 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 02:40:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-21 02:40:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-21 02:40:46,061 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2022-07-21 02:40:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:46,062 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-21 02:40:46,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:46,062 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-21 02:40:46,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 02:40:46,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:46,062 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:46,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:46,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:46,275 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:46,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:46,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2022-07-21 02:40:46,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:46,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471782498] [2022-07-21 02:40:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:46,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:46,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:46,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471782498] [2022-07-21 02:40:46,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471782498] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:46,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721412191] [2022-07-21 02:40:46,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:40:46,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:46,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:46,364 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) [2022-07-21 02:40:46,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 02:40:46,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-21 02:40:46,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:46,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 02:40:46,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:46,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:46,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721412191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:46,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:46,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2022-07-21 02:40:46,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061267204] [2022-07-21 02:40:46,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:46,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 02:40:46,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 02:40:46,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-07-21 02:40:46,515 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:46,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:46,643 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-07-21 02:40:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 02:40:46,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 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 44 [2022-07-21 02:40:46,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:46,644 INFO L225 Difference]: With dead ends: 56 [2022-07-21 02:40:46,644 INFO L226 Difference]: Without dead ends: 54 [2022-07-21 02:40:46,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2022-07-21 02:40:46,646 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:46,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-21 02:40:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-07-21 02:40:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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) [2022-07-21 02:40:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-07-21 02:40:46,655 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2022-07-21 02:40:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:46,655 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-07-21 02:40:46,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-07-21 02:40:46,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 02:40:46,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:46,657 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:46,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-21 02:40:46,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:46,876 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:46,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:46,876 INFO L85 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2022-07-21 02:40:46,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:46,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415414901] [2022-07-21 02:40:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:46,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:47,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:47,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415414901] [2022-07-21 02:40:47,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415414901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:47,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963047696] [2022-07-21 02:40:47,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:40:47,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:47,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:47,064 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) [2022-07-21 02:40:47,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 02:40:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:47,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 02:40:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:47,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:47,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963047696] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:47,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:47,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-07-21 02:40:47,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311973805] [2022-07-21 02:40:47,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:47,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 02:40:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 02:40:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 02:40:47,427 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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) [2022-07-21 02:40:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:47,613 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-07-21 02:40:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 02:40:47,614 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 47 [2022-07-21 02:40:47,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:47,614 INFO L225 Difference]: With dead ends: 86 [2022-07-21 02:40:47,614 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 02:40:47,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=566, Invalid=1884, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 02:40:47,615 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:47,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 126 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 02:40:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-21 02:40:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 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) [2022-07-21 02:40:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-07-21 02:40:47,618 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2022-07-21 02:40:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:47,619 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-07-21 02:40:47,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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) [2022-07-21 02:40:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-07-21 02:40:47,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 02:40:47,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:47,619 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:47,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:47,819 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,SelfDestructingSolverStorable20 [2022-07-21 02:40:47,820 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:47,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2022-07-21 02:40:47,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:47,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112926494] [2022-07-21 02:40:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:47,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:47,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:47,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112926494] [2022-07-21 02:40:47,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112926494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:47,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770369925] [2022-07-21 02:40:47,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:40:47,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:47,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:47,918 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) [2022-07-21 02:40:47,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 02:40:47,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:40:47,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 02:40:47,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:48,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:48,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770369925] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:48,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:48,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2022-07-21 02:40:48,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445247478] [2022-07-21 02:40:48,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:48,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 02:40:48,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:48,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 02:40:48,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:40:48,076 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:48,206 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-07-21 02:40:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 02:40:48,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 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 48 [2022-07-21 02:40:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:48,208 INFO L225 Difference]: With dead ends: 60 [2022-07-21 02:40:48,208 INFO L226 Difference]: Without dead ends: 58 [2022-07-21 02:40:48,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2022-07-21 02:40:48,209 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:48,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 27 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:48,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-21 02:40:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-07-21 02:40:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-07-21 02:40:48,214 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2022-07-21 02:40:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:48,214 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-07-21 02:40:48,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-07-21 02:40:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 02:40:48,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:48,215 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:48,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:48,424 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,SelfDestructingSolverStorable21 [2022-07-21 02:40:48,424 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:48,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:48,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2022-07-21 02:40:48,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:48,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469209141] [2022-07-21 02:40:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:48,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:48,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:48,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469209141] [2022-07-21 02:40:48,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469209141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:48,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729558286] [2022-07-21 02:40:48,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:40:48,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:48,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:48,631 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) [2022-07-21 02:40:48,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 02:40:48,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-21 02:40:48,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:48,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 02:40:48,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:48,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:49,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729558286] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:49,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:49,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2022-07-21 02:40:49,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743351853] [2022-07-21 02:40:49,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:49,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 02:40:49,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:49,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 02:40:49,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 02:40:49,076 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:49,281 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-07-21 02:40:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 02:40:49,281 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-21 02:40:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:49,281 INFO L225 Difference]: With dead ends: 93 [2022-07-21 02:40:49,281 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 02:40:49,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 02:40:49,282 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:49,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 152 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 02:40:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-21 02:40:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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) [2022-07-21 02:40:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-07-21 02:40:49,286 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2022-07-21 02:40:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:49,287 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-07-21 02:40:49,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-07-21 02:40:49,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 02:40:49,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:49,287 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:49,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:49,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:49,499 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2022-07-21 02:40:49,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:49,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501823723] [2022-07-21 02:40:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:49,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:49,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:49,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501823723] [2022-07-21 02:40:49,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501823723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:49,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802524366] [2022-07-21 02:40:49,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:40:49,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:49,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:49,604 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) [2022-07-21 02:40:49,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 02:40:49,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:40:49,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:49,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 02:40:49,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:49,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:49,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802524366] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:49,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:49,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2022-07-21 02:40:49,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099181963] [2022-07-21 02:40:49,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:49,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 02:40:49,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:49,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 02:40:49,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-07-21 02:40:49,771 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:49,915 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-07-21 02:40:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 02:40:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 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 52 [2022-07-21 02:40:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:49,916 INFO L225 Difference]: With dead ends: 64 [2022-07-21 02:40:49,916 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 02:40:49,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2022-07-21 02:40:49,917 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:49,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 26 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 02:40:49,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-07-21 02:40:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:49,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-07-21 02:40:49,928 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2022-07-21 02:40:49,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:49,928 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-07-21 02:40:49,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-07-21 02:40:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 02:40:49,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:49,929 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:49,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:50,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:50,146 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:50,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:50,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2022-07-21 02:40:50,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:50,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849566550] [2022-07-21 02:40:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:50,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:50,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:50,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849566550] [2022-07-21 02:40:50,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849566550] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:50,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105783218] [2022-07-21 02:40:50,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:40:50,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:50,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:50,377 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) [2022-07-21 02:40:50,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 02:40:50,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-21 02:40:50,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:50,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 02:40:50,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:50,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:50,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105783218] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:50,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:50,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2022-07-21 02:40:50,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988547306] [2022-07-21 02:40:50,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:50,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 02:40:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 02:40:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 02:40:50,885 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:51,121 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-07-21 02:40:51,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 02:40:51,121 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 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 [2022-07-21 02:40:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:51,122 INFO L225 Difference]: With dead ends: 100 [2022-07-21 02:40:51,122 INFO L226 Difference]: Without dead ends: 57 [2022-07-21 02:40:51,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=757, Invalid=2549, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 02:40:51,123 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:51,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 117 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-21 02:40:51,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-21 02:40:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-21 02:40:51,127 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2022-07-21 02:40:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:51,127 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-21 02:40:51,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-21 02:40:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 02:40:51,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:51,128 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:51,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:51,339 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,SelfDestructingSolverStorable24 [2022-07-21 02:40:51,340 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2022-07-21 02:40:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:51,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260381336] [2022-07-21 02:40:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:51,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:51,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260381336] [2022-07-21 02:40:51,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260381336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:51,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948446829] [2022-07-21 02:40:51,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:40:51,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:51,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:51,457 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) [2022-07-21 02:40:51,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 02:40:51,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-21 02:40:51,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:51,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 02:40:51,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:51,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:51,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948446829] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:51,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:51,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-07-21 02:40:51,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081007750] [2022-07-21 02:40:51,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:51,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 02:40:51,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:51,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 02:40:51,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:40:51,630 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2022-07-21 02:40:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:51,792 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-07-21 02:40:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 02:40:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) Word has length 56 [2022-07-21 02:40:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:51,793 INFO L225 Difference]: With dead ends: 68 [2022-07-21 02:40:51,793 INFO L226 Difference]: Without dead ends: 66 [2022-07-21 02:40:51,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 02:40:51,794 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:51,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 26 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-21 02:40:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-07-21 02:40:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-07-21 02:40:51,798 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2022-07-21 02:40:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:51,799 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-07-21 02:40:51,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2022-07-21 02:40:51,799 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-07-21 02:40:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 02:40:51,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:51,799 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:51,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:51,999 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,SelfDestructingSolverStorable25 [2022-07-21 02:40:52,000 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2022-07-21 02:40:52,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:52,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441168908] [2022-07-21 02:40:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:52,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:52,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441168908] [2022-07-21 02:40:52,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441168908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821389220] [2022-07-21 02:40:52,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:40:52,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:52,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:52,247 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) [2022-07-21 02:40:52,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 02:40:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:52,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 02:40:52,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:52,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:52,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821389220] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:52,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:52,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-07-21 02:40:52,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014485127] [2022-07-21 02:40:52,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:52,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 02:40:52,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:52,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 02:40:52,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 02:40:52,747 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:53,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:53,031 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2022-07-21 02:40:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 02:40:53,032 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 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 [2022-07-21 02:40:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:53,032 INFO L225 Difference]: With dead ends: 107 [2022-07-21 02:40:53,032 INFO L226 Difference]: Without dead ends: 61 [2022-07-21 02:40:53,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=863, Invalid=2919, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 02:40:53,033 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:53,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-21 02:40:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-21 02:40:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 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) [2022-07-21 02:40:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-07-21 02:40:53,038 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2022-07-21 02:40:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:53,038 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-07-21 02:40:53,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-07-21 02:40:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 02:40:53,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:53,038 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:53,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:53,251 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,SelfDestructingSolverStorable26 [2022-07-21 02:40:53,251 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:53,252 INFO L85 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2022-07-21 02:40:53,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:53,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384567167] [2022-07-21 02:40:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:53,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:53,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:53,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384567167] [2022-07-21 02:40:53,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384567167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:53,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44338017] [2022-07-21 02:40:53,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:40:53,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:53,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:53,390 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:40:53,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 02:40:53,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:40:53,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:53,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 02:40:53,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:53,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:53,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44338017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:53,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:53,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2022-07-21 02:40:53,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12171624] [2022-07-21 02:40:53,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:53,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 02:40:53,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:53,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 02:40:53,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-07-21 02:40:53,539 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:53,714 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-07-21 02:40:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 02:40:53,714 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 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 60 [2022-07-21 02:40:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:53,715 INFO L225 Difference]: With dead ends: 72 [2022-07-21 02:40:53,715 INFO L226 Difference]: Without dead ends: 70 [2022-07-21 02:40:53,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 02:40:53,716 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:53,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 30 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:53,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-21 02:40:53,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-07-21 02:40:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-07-21 02:40:53,721 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2022-07-21 02:40:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:53,721 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-07-21 02:40:53,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-07-21 02:40:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 02:40:53,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:53,721 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:53,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:53,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 02:40:53,938 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:53,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:53,938 INFO L85 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2022-07-21 02:40:53,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:53,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599927716] [2022-07-21 02:40:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:53,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:54,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599927716] [2022-07-21 02:40:54,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599927716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:54,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600364446] [2022-07-21 02:40:54,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:40:54,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:54,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:54,215 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:40:54,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 02:40:54,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-21 02:40:54,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:54,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 02:40:54,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:54,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:54,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600364446] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:54,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:54,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-21 02:40:54,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100522067] [2022-07-21 02:40:54,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:54,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 02:40:54,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:54,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 02:40:54,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 02:40:54,758 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:55,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:55,046 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2022-07-21 02:40:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 02:40:55,046 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-21 02:40:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:55,046 INFO L225 Difference]: With dead ends: 114 [2022-07-21 02:40:55,046 INFO L226 Difference]: Without dead ends: 65 [2022-07-21 02:40:55,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=976, Invalid=3314, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 02:40:55,048 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:55,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 147 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:55,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-21 02:40:55,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-21 02:40:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 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) [2022-07-21 02:40:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-07-21 02:40:55,053 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2022-07-21 02:40:55,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:55,053 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-07-21 02:40:55,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:55,053 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-07-21 02:40:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 02:40:55,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:55,053 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:55,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:55,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 02:40:55,267 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:55,267 INFO L85 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2022-07-21 02:40:55,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:55,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585797114] [2022-07-21 02:40:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:55,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:55,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:55,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585797114] [2022-07-21 02:40:55,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585797114] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:55,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438748758] [2022-07-21 02:40:55,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:40:55,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:55,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:55,415 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:40:55,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 02:40:55,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:40:55,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:55,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 02:40:55,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:55,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:55,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438748758] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:55,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:55,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2022-07-21 02:40:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715217964] [2022-07-21 02:40:55,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:55,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 02:40:55,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:55,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 02:40:55,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2022-07-21 02:40:55,601 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:55,810 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-07-21 02:40:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 02:40:55,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-21 02:40:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:55,814 INFO L225 Difference]: With dead ends: 76 [2022-07-21 02:40:55,814 INFO L226 Difference]: Without dead ends: 74 [2022-07-21 02:40:55,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 02:40:55,815 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:55,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 32 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-21 02:40:55,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2022-07-21 02:40:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-07-21 02:40:55,824 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2022-07-21 02:40:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:55,825 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-07-21 02:40:55,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-07-21 02:40:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 02:40:55,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:55,825 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:55,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:56,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:56,026 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:56,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:56,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2022-07-21 02:40:56,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:56,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560014174] [2022-07-21 02:40:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:56,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:56,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:56,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560014174] [2022-07-21 02:40:56,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560014174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:56,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254731172] [2022-07-21 02:40:56,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:40:56,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:56,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:56,388 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:40:56,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 02:40:56,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-21 02:40:56,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:56,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 02:40:56,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:56,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:56,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254731172] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:56,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:56,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-21 02:40:56,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810881529] [2022-07-21 02:40:56,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:56,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 02:40:56,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 02:40:56,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=2122, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 02:40:56,973 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 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) [2022-07-21 02:40:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:57,279 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2022-07-21 02:40:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 02:40:57,279 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 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) Word has length 67 [2022-07-21 02:40:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:57,279 INFO L225 Difference]: With dead ends: 121 [2022-07-21 02:40:57,279 INFO L226 Difference]: Without dead ends: 69 [2022-07-21 02:40:57,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1096, Invalid=3734, Unknown=0, NotChecked=0, Total=4830 [2022-07-21 02:40:57,281 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:57,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 192 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-21 02:40:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-21 02:40:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 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) [2022-07-21 02:40:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-07-21 02:40:57,286 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2022-07-21 02:40:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:57,286 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-07-21 02:40:57,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 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) [2022-07-21 02:40:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-07-21 02:40:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 02:40:57,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:57,287 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:57,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-21 02:40:57,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-21 02:40:57,495 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:57,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2022-07-21 02:40:57,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:57,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258719064] [2022-07-21 02:40:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:57,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:57,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:57,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258719064] [2022-07-21 02:40:57,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258719064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:57,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951947605] [2022-07-21 02:40:57,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:40:57,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:57,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:57,657 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:40:57,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 02:40:57,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-21 02:40:57,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:40:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 02:40:57,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:57,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:57,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951947605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:57,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:57,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2022-07-21 02:40:57,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714521039] [2022-07-21 02:40:57,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:57,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 02:40:57,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:57,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 02:40:57,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2022-07-21 02:40:57,869 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:58,061 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-07-21 02:40:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 02:40:58,061 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 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 68 [2022-07-21 02:40:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:58,062 INFO L225 Difference]: With dead ends: 80 [2022-07-21 02:40:58,062 INFO L226 Difference]: Without dead ends: 78 [2022-07-21 02:40:58,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 02:40:58,063 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:58,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-21 02:40:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-07-21 02:40:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 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) [2022-07-21 02:40:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-07-21 02:40:58,069 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2022-07-21 02:40:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:58,069 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-07-21 02:40:58,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:58,069 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-07-21 02:40:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 02:40:58,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:58,072 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:58,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-21 02:40:58,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:58,275 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2022-07-21 02:40:58,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:58,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925187319] [2022-07-21 02:40:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:58,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:58,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:58,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925187319] [2022-07-21 02:40:58,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925187319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:58,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444989237] [2022-07-21 02:40:58,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:40:58,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:58,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:58,630 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:40:58,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 02:40:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 02:40:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:40:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:59,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:40:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:59,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444989237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:40:59,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:40:59,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2022-07-21 02:40:59,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733186711] [2022-07-21 02:40:59,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:40:59,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-21 02:40:59,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:40:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-21 02:40:59,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=2373, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 02:40:59,250 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:40:59,576 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2022-07-21 02:40:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 02:40:59,576 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-21 02:40:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:40:59,576 INFO L225 Difference]: With dead ends: 128 [2022-07-21 02:40:59,576 INFO L226 Difference]: Without dead ends: 73 [2022-07-21 02:40:59,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1223, Invalid=4179, Unknown=0, NotChecked=0, Total=5402 [2022-07-21 02:40:59,577 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:40:59,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 185 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:40:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-21 02:40:59,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-21 02:40:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 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) [2022-07-21 02:40:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-07-21 02:40:59,584 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2022-07-21 02:40:59,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:40:59,584 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-07-21 02:40:59,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:40:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-07-21 02:40:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 02:40:59,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:40:59,584 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2022-07-21 02:40:59,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-21 02:40:59,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:59,785 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:40:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:40:59,785 INFO L85 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2022-07-21 02:40:59,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:40:59,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359416062] [2022-07-21 02:40:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:40:59,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:40:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:40:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:40:59,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:40:59,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359416062] [2022-07-21 02:40:59,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359416062] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:40:59,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002769086] [2022-07-21 02:40:59,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:40:59,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:40:59,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:40:59,958 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:40:59,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 02:41:00,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:41:00,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:00,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 02:41:00,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:00,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:00,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002769086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:00,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:00,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2022-07-21 02:41:00,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496448866] [2022-07-21 02:41:00,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:00,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 02:41:00,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 02:41:00,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-07-21 02:41:00,168 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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) [2022-07-21 02:41:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:00,384 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2022-07-21 02:41:00,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 02:41:00,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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) Word has length 72 [2022-07-21 02:41:00,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:00,385 INFO L225 Difference]: With dead ends: 84 [2022-07-21 02:41:00,385 INFO L226 Difference]: Without dead ends: 82 [2022-07-21 02:41:00,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 02:41:00,385 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:00,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 27 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-21 02:41:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-07-21 02:41:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-07-21 02:41:00,392 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2022-07-21 02:41:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:00,392 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-07-21 02:41:00,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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) [2022-07-21 02:41:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-07-21 02:41:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 02:41:00,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:00,393 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:00,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-21 02:41:00,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-21 02:41:00,593 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:00,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:00,594 INFO L85 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2022-07-21 02:41:00,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:00,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935728814] [2022-07-21 02:41:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:00,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:00,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:00,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935728814] [2022-07-21 02:41:00,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935728814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:00,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266527293] [2022-07-21 02:41:00,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:41:00,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:00,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:00,983 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:00,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 02:41:01,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-21 02:41:01,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:01,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 02:41:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:01,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:01,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266527293] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:01,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:01,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2022-07-21 02:41:01,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014345611] [2022-07-21 02:41:01,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:01,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-21 02:41:01,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:01,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-21 02:41:01,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=2638, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 02:41:01,699 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:02,104 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2022-07-21 02:41:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 02:41:02,104 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 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 [2022-07-21 02:41:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:02,104 INFO L225 Difference]: With dead ends: 135 [2022-07-21 02:41:02,104 INFO L226 Difference]: Without dead ends: 77 [2022-07-21 02:41:02,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1357, Invalid=4649, Unknown=0, NotChecked=0, Total=6006 [2022-07-21 02:41:02,105 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:02,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 206 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:02,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-21 02:41:02,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-07-21 02:41:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:02,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-07-21 02:41:02,112 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2022-07-21 02:41:02,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:02,113 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-07-21 02:41:02,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:02,113 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-07-21 02:41:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 02:41:02,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:02,114 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:02,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:02,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-21 02:41:02,327 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:02,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:02,328 INFO L85 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2022-07-21 02:41:02,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:02,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324711098] [2022-07-21 02:41:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:02,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:02,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:02,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324711098] [2022-07-21 02:41:02,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324711098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:02,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842656371] [2022-07-21 02:41:02,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:41:02,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:02,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:02,516 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:02,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-21 02:41:02,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:41:02,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-21 02:41:02,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:02,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:02,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842656371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:02,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:02,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2022-07-21 02:41:02,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125936811] [2022-07-21 02:41:02,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:02,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 02:41:02,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:02,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 02:41:02,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2022-07-21 02:41:02,745 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 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) [2022-07-21 02:41:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:02,973 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2022-07-21 02:41:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 02:41:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 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) Word has length 76 [2022-07-21 02:41:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:02,974 INFO L225 Difference]: With dead ends: 88 [2022-07-21 02:41:02,974 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 02:41:02,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 02:41:02,975 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 86 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:02,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 31 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 02:41:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-07-21 02:41:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-07-21 02:41:02,982 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2022-07-21 02:41:02,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:02,983 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-07-21 02:41:02,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 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) [2022-07-21 02:41:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-07-21 02:41:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 02:41:02,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:02,983 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:03,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:03,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-21 02:41:03,195 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:03,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:03,196 INFO L85 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2022-07-21 02:41:03,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:03,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629857410] [2022-07-21 02:41:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:03,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:03,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:03,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629857410] [2022-07-21 02:41:03,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629857410] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:03,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042301130] [2022-07-21 02:41:03,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:41:03,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:03,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:03,630 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:03,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-21 02:41:03,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-07-21 02:41:03,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:03,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 02:41:03,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:04,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:04,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042301130] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:04,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:04,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2022-07-21 02:41:04,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133337513] [2022-07-21 02:41:04,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:04,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-21 02:41:04,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:04,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-21 02:41:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=2917, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 02:41:04,350 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:04,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:04,768 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2022-07-21 02:41:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 02:41:04,769 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 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 [2022-07-21 02:41:04,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:04,769 INFO L225 Difference]: With dead ends: 142 [2022-07-21 02:41:04,769 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 02:41:04,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-07-21 02:41:04,770 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:04,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 235 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 02:41:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-21 02:41:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-07-21 02:41:04,778 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2022-07-21 02:41:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:04,778 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-07-21 02:41:04,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-07-21 02:41:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 02:41:04,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:04,779 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:04,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-21 02:41:04,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:04,991 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:04,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:04,991 INFO L85 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2022-07-21 02:41:04,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:04,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001481494] [2022-07-21 02:41:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:04,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:05,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:05,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001481494] [2022-07-21 02:41:05,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001481494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:05,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128533101] [2022-07-21 02:41:05,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:41:05,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:05,194 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:05,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-21 02:41:05,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-21 02:41:05,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:05,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 02:41:05,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:05,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:05,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128533101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:05,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:05,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2022-07-21 02:41:05,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338351059] [2022-07-21 02:41:05,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:05,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 02:41:05,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 02:41:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2022-07-21 02:41:05,430 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:05,680 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-07-21 02:41:05,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 02:41:05,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 80 [2022-07-21 02:41:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:05,681 INFO L225 Difference]: With dead ends: 92 [2022-07-21 02:41:05,681 INFO L226 Difference]: Without dead ends: 90 [2022-07-21 02:41:05,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=743, Invalid=1327, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 02:41:05,681 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:05,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 23 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-21 02:41:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-07-21 02:41:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 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) [2022-07-21 02:41:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-07-21 02:41:05,690 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2022-07-21 02:41:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:05,690 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-07-21 02:41:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-07-21 02:41:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 02:41:05,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:05,690 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:05,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-21 02:41:05,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 02:41:05,891 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:05,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2022-07-21 02:41:05,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:05,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042587415] [2022-07-21 02:41:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:05,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:06,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:06,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042587415] [2022-07-21 02:41:06,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042587415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:06,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485379565] [2022-07-21 02:41:06,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:41:06,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:06,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:06,340 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:06,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-21 02:41:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:06,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 02:41:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:07,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:07,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485379565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:07,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:07,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2022-07-21 02:41:07,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13096298] [2022-07-21 02:41:07,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:07,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-21 02:41:07,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:07,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-21 02:41:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=3210, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 02:41:07,141 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:07,564 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2022-07-21 02:41:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 02:41:07,564 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 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 83 [2022-07-21 02:41:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:07,564 INFO L225 Difference]: With dead ends: 149 [2022-07-21 02:41:07,564 INFO L226 Difference]: Without dead ends: 85 [2022-07-21 02:41:07,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1646, Invalid=5664, Unknown=0, NotChecked=0, Total=7310 [2022-07-21 02:41:07,565 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:07,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 210 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-21 02:41:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-21 02:41:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-21 02:41:07,574 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2022-07-21 02:41:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:07,574 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-21 02:41:07,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-21 02:41:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 02:41:07,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:07,575 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:07,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-21 02:41:07,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 02:41:07,792 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:07,792 INFO L85 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2022-07-21 02:41:07,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:07,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026737050] [2022-07-21 02:41:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:07,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:08,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:08,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026737050] [2022-07-21 02:41:08,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026737050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:08,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197627846] [2022-07-21 02:41:08,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:41:08,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:08,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:08,034 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:08,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-21 02:41:08,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:41:08,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:08,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 02:41:08,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:08,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:08,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197627846] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:08,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:08,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-07-21 02:41:08,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067106850] [2022-07-21 02:41:08,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:08,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 02:41:08,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:08,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 02:41:08,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2022-07-21 02:41:08,260 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 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) [2022-07-21 02:41:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:08,535 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2022-07-21 02:41:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 02:41:08,536 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 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) Word has length 84 [2022-07-21 02:41:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:08,536 INFO L225 Difference]: With dead ends: 96 [2022-07-21 02:41:08,536 INFO L226 Difference]: Without dead ends: 94 [2022-07-21 02:41:08,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=811, Invalid=1445, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 02:41:08,537 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 94 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:08,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 27 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-21 02:41:08,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2022-07-21 02:41:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-07-21 02:41:08,545 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2022-07-21 02:41:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:08,545 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-07-21 02:41:08,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 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) [2022-07-21 02:41:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-07-21 02:41:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 02:41:08,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:08,546 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:08,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:08,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-21 02:41:08,747 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:08,747 INFO L85 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2022-07-21 02:41:08,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:08,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011071793] [2022-07-21 02:41:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:08,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:09,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011071793] [2022-07-21 02:41:09,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011071793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408073533] [2022-07-21 02:41:09,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:41:09,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:09,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:09,254 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:09,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-21 02:41:09,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-07-21 02:41:09,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:09,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 02:41:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:10,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:10,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408073533] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:10,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:10,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2022-07-21 02:41:10,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503951783] [2022-07-21 02:41:10,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:10,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-21 02:41:10,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-21 02:41:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=3517, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 02:41:10,157 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:10,635 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2022-07-21 02:41:10,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 02:41:10,635 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-21 02:41:10,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:10,636 INFO L225 Difference]: With dead ends: 156 [2022-07-21 02:41:10,636 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 02:41:10,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1801, Invalid=6209, Unknown=0, NotChecked=0, Total=8010 [2022-07-21 02:41:10,637 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:10,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 243 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 02:41:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-21 02:41:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 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) [2022-07-21 02:41:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-07-21 02:41:10,646 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2022-07-21 02:41:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:10,646 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-07-21 02:41:10,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-07-21 02:41:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-21 02:41:10,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:10,646 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:10,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-21 02:41:10,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-07-21 02:41:10,864 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2022-07-21 02:41:10,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:10,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290653992] [2022-07-21 02:41:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:10,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:11,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:11,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290653992] [2022-07-21 02:41:11,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290653992] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:11,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720937941] [2022-07-21 02:41:11,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:41:11,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:11,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:11,099 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:11,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-21 02:41:11,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:41:11,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:11,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 02:41:11,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:11,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:11,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720937941] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:11,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:11,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2022-07-21 02:41:11,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716152855] [2022-07-21 02:41:11,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:11,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 02:41:11,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:11,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 02:41:11,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2022-07-21 02:41:11,343 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:11,647 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2022-07-21 02:41:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 02:41:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-07-21 02:41:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:11,648 INFO L225 Difference]: With dead ends: 100 [2022-07-21 02:41:11,648 INFO L226 Difference]: Without dead ends: 98 [2022-07-21 02:41:11,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=882, Invalid=1568, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 02:41:11,649 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:11,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 32 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-21 02:41:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2022-07-21 02:41:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-07-21 02:41:11,660 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2022-07-21 02:41:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:11,660 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-07-21 02:41:11,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-07-21 02:41:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 02:41:11,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:11,661 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:11,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:11,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:11,879 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:11,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2022-07-21 02:41:11,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:11,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742873110] [2022-07-21 02:41:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:11,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:12,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742873110] [2022-07-21 02:41:12,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742873110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357576283] [2022-07-21 02:41:12,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:41:12,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:12,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:12,407 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:12,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-21 02:41:12,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-21 02:41:12,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:12,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 02:41:12,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:13,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:13,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357576283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:13,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:13,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2022-07-21 02:41:13,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278653029] [2022-07-21 02:41:13,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:13,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-21 02:41:13,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:13,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-21 02:41:13,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=3838, Unknown=0, NotChecked=0, Total=4970 [2022-07-21 02:41:13,314 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:13,792 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2022-07-21 02:41:13,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 02:41:13,792 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-21 02:41:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:13,793 INFO L225 Difference]: With dead ends: 163 [2022-07-21 02:41:13,793 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 02:41:13,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1963, Invalid=6779, Unknown=0, NotChecked=0, Total=8742 [2022-07-21 02:41:13,794 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:13,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 230 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:13,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 02:41:13,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-21 02:41:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-07-21 02:41:13,810 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2022-07-21 02:41:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:13,810 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-07-21 02:41:13,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-07-21 02:41:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 02:41:13,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:13,811 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:13,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:14,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:14,029 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2022-07-21 02:41:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:14,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426053783] [2022-07-21 02:41:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:14,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:14,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:14,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426053783] [2022-07-21 02:41:14,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426053783] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:14,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447961003] [2022-07-21 02:41:14,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:41:14,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:14,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:14,257 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:14,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-21 02:41:14,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-07-21 02:41:14,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:14,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 02:41:14,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:14,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:14,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447961003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:14,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:14,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2022-07-21 02:41:14,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248885753] [2022-07-21 02:41:14,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:14,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 02:41:14,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:14,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 02:41:14,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2022-07-21 02:41:14,520 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:14,820 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2022-07-21 02:41:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-21 02:41:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-21 02:41:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:14,820 INFO L225 Difference]: With dead ends: 104 [2022-07-21 02:41:14,821 INFO L226 Difference]: Without dead ends: 102 [2022-07-21 02:41:14,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=956, Invalid=1696, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 02:41:14,821 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:14,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 32 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-21 02:41:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2022-07-21 02:41:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 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) [2022-07-21 02:41:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-07-21 02:41:14,831 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2022-07-21 02:41:14,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:14,831 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-07-21 02:41:14,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-07-21 02:41:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-21 02:41:14,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:14,832 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:14,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:15,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-21 02:41:15,048 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:15,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:15,048 INFO L85 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2022-07-21 02:41:15,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:15,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493532592] [2022-07-21 02:41:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:15,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:15,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:15,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493532592] [2022-07-21 02:41:15,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493532592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:15,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042606494] [2022-07-21 02:41:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:41:15,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:15,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:15,629 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:15,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-21 02:41:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:15,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 02:41:15,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:16,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:16,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042606494] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:16,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:16,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2022-07-21 02:41:16,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691751716] [2022-07-21 02:41:16,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:16,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-21 02:41:16,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:16,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-21 02:41:16,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=4173, Unknown=0, NotChecked=0, Total=5402 [2022-07-21 02:41:16,607 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:17,137 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2022-07-21 02:41:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 02:41:17,137 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 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 [2022-07-21 02:41:17,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:17,138 INFO L225 Difference]: With dead ends: 170 [2022-07-21 02:41:17,138 INFO L226 Difference]: Without dead ends: 97 [2022-07-21 02:41:17,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2132, Invalid=7374, Unknown=0, NotChecked=0, Total=9506 [2022-07-21 02:41:17,139 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:17,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 305 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-21 02:41:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-07-21 02:41:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 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) [2022-07-21 02:41:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-07-21 02:41:17,149 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2022-07-21 02:41:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:17,149 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-07-21 02:41:17,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-07-21 02:41:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 02:41:17,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:17,150 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:17,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-07-21 02:41:17,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-21 02:41:17,354 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:17,354 INFO L85 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2022-07-21 02:41:17,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:17,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637345917] [2022-07-21 02:41:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:17,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:17,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:17,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637345917] [2022-07-21 02:41:17,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637345917] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:17,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984852169] [2022-07-21 02:41:17,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:41:17,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:17,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:17,626 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:17,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-21 02:41:17,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:41:17,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:17,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 02:41:17,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:17,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:17,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984852169] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:17,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:17,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 29 [2022-07-21 02:41:17,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381922421] [2022-07-21 02:41:17,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 02:41:17,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 02:41:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2022-07-21 02:41:17,894 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 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) [2022-07-21 02:41:18,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:18,184 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2022-07-21 02:41:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-21 02:41:18,185 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 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) Word has length 96 [2022-07-21 02:41:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:18,185 INFO L225 Difference]: With dead ends: 108 [2022-07-21 02:41:18,185 INFO L226 Difference]: Without dead ends: 106 [2022-07-21 02:41:18,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1033, Invalid=1829, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 02:41:18,186 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:18,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 30 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-21 02:41:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2022-07-21 02:41:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 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) [2022-07-21 02:41:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-07-21 02:41:18,204 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2022-07-21 02:41:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:18,204 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-07-21 02:41:18,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 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) [2022-07-21 02:41:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-07-21 02:41:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-21 02:41:18,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:18,205 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:18,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-21 02:41:18,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-21 02:41:18,406 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2022-07-21 02:41:18,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:18,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941129781] [2022-07-21 02:41:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:18,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:19,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941129781] [2022-07-21 02:41:19,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941129781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:19,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519872586] [2022-07-21 02:41:19,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:41:19,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:19,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:19,010 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:19,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-21 02:41:19,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-07-21 02:41:19,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:19,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 02:41:19,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:19,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:20,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519872586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:20,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:20,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2022-07-21 02:41:20,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033157072] [2022-07-21 02:41:20,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:20,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-21 02:41:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-21 02:41:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=4522, Unknown=0, NotChecked=0, Total=5852 [2022-07-21 02:41:20,059 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:20,632 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2022-07-21 02:41:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-21 02:41:20,632 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 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 [2022-07-21 02:41:20,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:20,633 INFO L225 Difference]: With dead ends: 177 [2022-07-21 02:41:20,633 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 02:41:20,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2308, Invalid=7994, Unknown=0, NotChecked=0, Total=10302 [2022-07-21 02:41:20,634 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:20,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 335 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 02:41:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-07-21 02:41:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 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) [2022-07-21 02:41:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-07-21 02:41:20,645 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2022-07-21 02:41:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:20,645 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-07-21 02:41:20,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-07-21 02:41:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-21 02:41:20,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:20,646 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:20,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-21 02:41:20,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:20,858 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:20,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2022-07-21 02:41:20,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:20,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140782212] [2022-07-21 02:41:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:20,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:21,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:21,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140782212] [2022-07-21 02:41:21,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140782212] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:21,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934298409] [2022-07-21 02:41:21,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:41:21,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:21,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:21,109 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:21,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-21 02:41:21,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:41:21,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:21,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 02:41:21,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:21,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:21,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934298409] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:21,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:21,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2022-07-21 02:41:21,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624622021] [2022-07-21 02:41:21,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:21,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 02:41:21,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:21,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 02:41:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2022-07-21 02:41:21,389 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 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) [2022-07-21 02:41:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:21,707 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2022-07-21 02:41:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 02:41:21,707 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 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) Word has length 100 [2022-07-21 02:41:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:21,708 INFO L225 Difference]: With dead ends: 112 [2022-07-21 02:41:21,708 INFO L226 Difference]: Without dead ends: 110 [2022-07-21 02:41:21,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1113, Invalid=1967, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 02:41:21,709 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:21,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 25 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-21 02:41:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2022-07-21 02:41:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-07-21 02:41:21,737 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2022-07-21 02:41:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:21,737 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-07-21 02:41:21,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 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) [2022-07-21 02:41:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-07-21 02:41:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-21 02:41:21,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:21,738 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:21,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:21,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-21 02:41:21,951 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:21,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2022-07-21 02:41:21,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:21,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881904912] [2022-07-21 02:41:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:21,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:22,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881904912] [2022-07-21 02:41:22,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881904912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756648647] [2022-07-21 02:41:22,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:41:22,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:22,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:22,612 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:22,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-21 02:41:22,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-07-21 02:41:22,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:22,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 02:41:22,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:23,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:23,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756648647] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:23,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:23,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2022-07-21 02:41:23,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238681985] [2022-07-21 02:41:23,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:23,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-21 02:41:23,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-21 02:41:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=4885, Unknown=0, NotChecked=0, Total=6320 [2022-07-21 02:41:23,719 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:24,332 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2022-07-21 02:41:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-21 02:41:24,332 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-07-21 02:41:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:24,333 INFO L225 Difference]: With dead ends: 184 [2022-07-21 02:41:24,333 INFO L226 Difference]: Without dead ends: 105 [2022-07-21 02:41:24,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2491, Invalid=8639, Unknown=0, NotChecked=0, Total=11130 [2022-07-21 02:41:24,334 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:24,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 314 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:24,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-21 02:41:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-21 02:41:24,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-07-21 02:41:24,346 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2022-07-21 02:41:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:24,346 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-07-21 02:41:24,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-07-21 02:41:24,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-21 02:41:24,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:24,346 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:24,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:24,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-21 02:41:24,547 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:24,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2022-07-21 02:41:24,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:24,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831740613] [2022-07-21 02:41:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:24,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:24,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:24,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831740613] [2022-07-21 02:41:24,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831740613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:24,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439831858] [2022-07-21 02:41:24,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:41:24,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:24,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:24,828 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:24,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-21 02:41:24,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-07-21 02:41:24,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:24,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 02:41:24,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:25,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:25,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439831858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:25,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:25,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2022-07-21 02:41:25,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410391133] [2022-07-21 02:41:25,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:25,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 02:41:25,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:25,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 02:41:25,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2022-07-21 02:41:25,111 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:25,475 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2022-07-21 02:41:25,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-21 02:41:25,475 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 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 104 [2022-07-21 02:41:25,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:25,479 INFO L225 Difference]: With dead ends: 116 [2022-07-21 02:41:25,479 INFO L226 Difference]: Without dead ends: 114 [2022-07-21 02:41:25,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1196, Invalid=2110, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 02:41:25,480 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:25,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 35 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-21 02:41:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2022-07-21 02:41:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-07-21 02:41:25,493 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2022-07-21 02:41:25,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:25,493 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-07-21 02:41:25,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:25,493 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-07-21 02:41:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-21 02:41:25,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:25,494 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:25,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:25,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-21 02:41:25,707 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:25,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2022-07-21 02:41:25,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:25,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65812199] [2022-07-21 02:41:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:25,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:26,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:26,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65812199] [2022-07-21 02:41:26,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65812199] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:26,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800700812] [2022-07-21 02:41:26,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:41:26,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:26,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:26,413 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:26,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-21 02:41:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:26,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 02:41:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:27,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:27,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800700812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:27,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:27,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2022-07-21 02:41:27,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971432881] [2022-07-21 02:41:27,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:27,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-21 02:41:27,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:27,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-21 02:41:27,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=5262, Unknown=0, NotChecked=0, Total=6806 [2022-07-21 02:41:27,611 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:28,243 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2022-07-21 02:41:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 02:41:28,244 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 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 [2022-07-21 02:41:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:28,244 INFO L225 Difference]: With dead ends: 191 [2022-07-21 02:41:28,245 INFO L226 Difference]: Without dead ends: 109 [2022-07-21 02:41:28,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2709 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2681, Invalid=9309, Unknown=0, NotChecked=0, Total=11990 [2022-07-21 02:41:28,245 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:28,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 271 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-21 02:41:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-07-21 02:41:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 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) [2022-07-21 02:41:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-07-21 02:41:28,263 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2022-07-21 02:41:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:28,263 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-07-21 02:41:28,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:28,263 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-07-21 02:41:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-21 02:41:28,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:28,264 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:28,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:28,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-07-21 02:41:28,472 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:28,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2022-07-21 02:41:28,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:28,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182759921] [2022-07-21 02:41:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:28,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:28,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182759921] [2022-07-21 02:41:28,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182759921] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:28,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333512475] [2022-07-21 02:41:28,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:41:28,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:28,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:28,779 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:28,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-21 02:41:28,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:41:28,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:28,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 02:41:28,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:28,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:29,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333512475] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:29,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:29,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 32 [2022-07-21 02:41:29,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484689846] [2022-07-21 02:41:29,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:29,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 02:41:29,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:29,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 02:41:29,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2022-07-21 02:41:29,050 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:29,396 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2022-07-21 02:41:29,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 02:41:29,397 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 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 108 [2022-07-21 02:41:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:29,397 INFO L225 Difference]: With dead ends: 120 [2022-07-21 02:41:29,397 INFO L226 Difference]: Without dead ends: 118 [2022-07-21 02:41:29,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1282, Invalid=2258, Unknown=0, NotChecked=0, Total=3540 [2022-07-21 02:41:29,398 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:29,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 34 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-21 02:41:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2022-07-21 02:41:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-07-21 02:41:29,424 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2022-07-21 02:41:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:29,424 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-07-21 02:41:29,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-07-21 02:41:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 02:41:29,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:29,425 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:29,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-21 02:41:29,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:29,625 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:29,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:29,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2022-07-21 02:41:29,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:29,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819825431] [2022-07-21 02:41:29,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:29,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:30,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:30,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819825431] [2022-07-21 02:41:30,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819825431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:30,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369059561] [2022-07-21 02:41:30,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:41:30,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:30,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:30,374 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:30,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-21 02:41:30,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-07-21 02:41:30,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:30,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 02:41:30,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:31,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:31,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369059561] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:31,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:31,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2022-07-21 02:41:31,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608145556] [2022-07-21 02:41:31,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:31,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-21 02:41:31,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-21 02:41:31,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=5653, Unknown=0, NotChecked=0, Total=7310 [2022-07-21 02:41:31,597 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:32,293 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2022-07-21 02:41:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-21 02:41:32,293 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 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 111 [2022-07-21 02:41:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:32,294 INFO L225 Difference]: With dead ends: 198 [2022-07-21 02:41:32,294 INFO L226 Difference]: Without dead ends: 113 [2022-07-21 02:41:32,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2908 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2878, Invalid=10004, Unknown=0, NotChecked=0, Total=12882 [2022-07-21 02:41:32,295 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:32,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 381 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-21 02:41:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-07-21 02:41:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-07-21 02:41:32,309 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2022-07-21 02:41:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:32,309 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-07-21 02:41:32,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-07-21 02:41:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-21 02:41:32,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:32,309 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:32,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:32,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-07-21 02:41:32,510 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:32,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:32,510 INFO L85 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2022-07-21 02:41:32,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:32,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715266364] [2022-07-21 02:41:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:32,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:32,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:32,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715266364] [2022-07-21 02:41:32,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715266364] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:32,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954975825] [2022-07-21 02:41:32,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:41:32,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:32,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:32,817 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:32,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-21 02:41:32,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:41:32,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:32,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 02:41:32,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:33,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:33,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954975825] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:33,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:33,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2022-07-21 02:41:33,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894677010] [2022-07-21 02:41:33,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:33,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 02:41:33,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 02:41:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 02:41:33,125 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 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) [2022-07-21 02:41:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:33,505 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2022-07-21 02:41:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-21 02:41:33,505 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 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 112 [2022-07-21 02:41:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:33,506 INFO L225 Difference]: With dead ends: 124 [2022-07-21 02:41:33,506 INFO L226 Difference]: Without dead ends: 122 [2022-07-21 02:41:33,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1371, Invalid=2411, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 02:41:33,507 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:33,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 34 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-21 02:41:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2022-07-21 02:41:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2022-07-21 02:41:33,520 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2022-07-21 02:41:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:33,521 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2022-07-21 02:41:33,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 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) [2022-07-21 02:41:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2022-07-21 02:41:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-21 02:41:33,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:33,521 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:33,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:33,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:33,722 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:33,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:33,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2022-07-21 02:41:33,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:33,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219549229] [2022-07-21 02:41:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:33,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:34,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:34,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219549229] [2022-07-21 02:41:34,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219549229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:34,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811617511] [2022-07-21 02:41:34,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:41:34,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:34,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:34,514 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:34,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-21 02:41:34,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-07-21 02:41:34,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-21 02:41:34,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:35,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:35,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811617511] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:35,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:35,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2022-07-21 02:41:35,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806016818] [2022-07-21 02:41:35,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:35,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-21 02:41:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-21 02:41:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=6058, Unknown=0, NotChecked=0, Total=7832 [2022-07-21 02:41:35,840 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:36,560 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2022-07-21 02:41:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 02:41:36,560 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 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 115 [2022-07-21 02:41:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:36,561 INFO L225 Difference]: With dead ends: 205 [2022-07-21 02:41:36,561 INFO L226 Difference]: Without dead ends: 117 [2022-07-21 02:41:36,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3114 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3082, Invalid=10724, Unknown=0, NotChecked=0, Total=13806 [2022-07-21 02:41:36,564 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:36,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 346 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-21 02:41:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-21 02:41:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 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) [2022-07-21 02:41:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-07-21 02:41:36,578 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2022-07-21 02:41:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:36,578 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-07-21 02:41:36,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-07-21 02:41:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 02:41:36,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:36,579 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:36,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:36,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:36,779 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2022-07-21 02:41:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:36,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369189183] [2022-07-21 02:41:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:37,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:37,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369189183] [2022-07-21 02:41:37,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369189183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:37,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873166965] [2022-07-21 02:41:37,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:41:37,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:37,103 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:37,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-21 02:41:37,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-07-21 02:41:37,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:37,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 02:41:37,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:37,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:37,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873166965] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:37,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:37,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2022-07-21 02:41:37,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448577012] [2022-07-21 02:41:37,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:37,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 02:41:37,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 02:41:37,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 02:41:37,426 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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) [2022-07-21 02:41:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:37,817 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2022-07-21 02:41:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-21 02:41:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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) Word has length 116 [2022-07-21 02:41:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:37,818 INFO L225 Difference]: With dead ends: 128 [2022-07-21 02:41:37,818 INFO L226 Difference]: Without dead ends: 126 [2022-07-21 02:41:37,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1463, Invalid=2569, Unknown=0, NotChecked=0, Total=4032 [2022-07-21 02:41:37,819 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:37,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 31 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-21 02:41:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2022-07-21 02:41:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-07-21 02:41:37,841 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2022-07-21 02:41:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:37,841 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-07-21 02:41:37,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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) [2022-07-21 02:41:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-07-21 02:41:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-21 02:41:37,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:37,841 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:37,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:38,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:38,042 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:38,043 INFO L85 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2022-07-21 02:41:38,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:38,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574624180] [2022-07-21 02:41:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:38,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:38,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:38,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574624180] [2022-07-21 02:41:38,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574624180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:38,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991621826] [2022-07-21 02:41:38,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:41:38,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:38,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:38,904 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:38,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-21 02:41:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:38,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 02:41:38,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:40,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:40,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991621826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:40,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:40,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2022-07-21 02:41:40,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292055591] [2022-07-21 02:41:40,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:40,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-21 02:41:40,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-21 02:41:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=6477, Unknown=0, NotChecked=0, Total=8372 [2022-07-21 02:41:40,257 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:41,038 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2022-07-21 02:41:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-21 02:41:41,038 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-07-21 02:41:41,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:41,039 INFO L225 Difference]: With dead ends: 212 [2022-07-21 02:41:41,039 INFO L226 Difference]: Without dead ends: 121 [2022-07-21 02:41:41,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3327 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3293, Invalid=11469, Unknown=0, NotChecked=0, Total=14762 [2022-07-21 02:41:41,040 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:41,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 397 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-21 02:41:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-21 02:41:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-07-21 02:41:41,068 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2022-07-21 02:41:41,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:41,068 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-07-21 02:41:41,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:41,068 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-07-21 02:41:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 02:41:41,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:41,069 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:41,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-07-21 02:41:41,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:41,272 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2022-07-21 02:41:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:41,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056979019] [2022-07-21 02:41:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:41,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:41,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056979019] [2022-07-21 02:41:41,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056979019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:41,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593673705] [2022-07-21 02:41:41,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:41:41,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:41,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:41,660 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:41,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-21 02:41:41,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:41:41,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:41,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 02:41:41,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:41,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:42,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593673705] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:42,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:42,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 35 [2022-07-21 02:41:42,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630329559] [2022-07-21 02:41:42,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:42,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 02:41:42,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:42,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 02:41:42,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 02:41:42,002 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:42,400 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2022-07-21 02:41:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-21 02:41:42,400 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-21 02:41:42,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:42,400 INFO L225 Difference]: With dead ends: 132 [2022-07-21 02:41:42,400 INFO L226 Difference]: Without dead ends: 130 [2022-07-21 02:41:42,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1558, Invalid=2732, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 02:41:42,401 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 134 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:42,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 33 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-21 02:41:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2022-07-21 02:41:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-07-21 02:41:42,416 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2022-07-21 02:41:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:42,417 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-07-21 02:41:42,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-07-21 02:41:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-21 02:41:42,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:42,417 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:42,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-07-21 02:41:42,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-21 02:41:42,631 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:42,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:42,632 INFO L85 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2022-07-21 02:41:42,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:42,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62889053] [2022-07-21 02:41:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:42,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:43,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:43,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62889053] [2022-07-21 02:41:43,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62889053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:43,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248994347] [2022-07-21 02:41:43,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:41:43,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:43,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:43,550 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:43,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-21 02:41:43,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-07-21 02:41:43,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:43,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 02:41:43,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:44,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:44,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248994347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:44,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:44,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2022-07-21 02:41:44,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966399545] [2022-07-21 02:41:44,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:44,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-21 02:41:44,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:44,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-21 02:41:44,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=6910, Unknown=0, NotChecked=0, Total=8930 [2022-07-21 02:41:44,993 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:45,837 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2022-07-21 02:41:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-21 02:41:45,837 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 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 123 [2022-07-21 02:41:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:45,837 INFO L225 Difference]: With dead ends: 219 [2022-07-21 02:41:45,837 INFO L226 Difference]: Without dead ends: 125 [2022-07-21 02:41:45,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3547 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3511, Invalid=12239, Unknown=0, NotChecked=0, Total=15750 [2022-07-21 02:41:45,838 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:45,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 418 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-21 02:41:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-07-21 02:41:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-07-21 02:41:45,854 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2022-07-21 02:41:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:45,854 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-07-21 02:41:45,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-07-21 02:41:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 02:41:45,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:45,855 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:45,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:46,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-21 02:41:46,072 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:46,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:46,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2022-07-21 02:41:46,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:46,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215357343] [2022-07-21 02:41:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:46,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:46,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:46,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215357343] [2022-07-21 02:41:46,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215357343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:46,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283965618] [2022-07-21 02:41:46,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:41:46,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:46,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:46,482 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:46,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-21 02:41:46,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:41:46,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:46,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 02:41:46,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:46,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:46,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283965618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:46,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:46,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2022-07-21 02:41:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143070854] [2022-07-21 02:41:46,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:46,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 02:41:46,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 02:41:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 02:41:46,789 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:47,218 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2022-07-21 02:41:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-21 02:41:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 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 124 [2022-07-21 02:41:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:47,219 INFO L225 Difference]: With dead ends: 136 [2022-07-21 02:41:47,219 INFO L226 Difference]: Without dead ends: 134 [2022-07-21 02:41:47,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1656, Invalid=2900, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 02:41:47,220 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:47,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 28 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-21 02:41:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2022-07-21 02:41:47,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-07-21 02:41:47,236 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2022-07-21 02:41:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:47,236 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-07-21 02:41:47,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-07-21 02:41:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-21 02:41:47,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:47,237 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:47,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-07-21 02:41:47,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-21 02:41:47,437 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:47,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2022-07-21 02:41:47,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:47,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901739481] [2022-07-21 02:41:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:47,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:48,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901739481] [2022-07-21 02:41:48,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901739481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404741668] [2022-07-21 02:41:48,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:41:48,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:48,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:48,403 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:48,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-21 02:41:48,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-07-21 02:41:48,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:48,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 02:41:48,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:49,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:49,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404741668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:49,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:49,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2022-07-21 02:41:49,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076927369] [2022-07-21 02:41:49,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:49,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-21 02:41:49,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-21 02:41:49,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=7357, Unknown=0, NotChecked=0, Total=9506 [2022-07-21 02:41:49,929 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:50,745 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2022-07-21 02:41:50,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-21 02:41:50,745 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 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 127 [2022-07-21 02:41:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:50,746 INFO L225 Difference]: With dead ends: 226 [2022-07-21 02:41:50,746 INFO L226 Difference]: Without dead ends: 129 [2022-07-21 02:41:50,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3774 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3736, Invalid=13034, Unknown=0, NotChecked=0, Total=16770 [2022-07-21 02:41:50,747 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:50,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 352 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-21 02:41:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-21 02:41:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 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) [2022-07-21 02:41:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-07-21 02:41:50,763 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2022-07-21 02:41:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:50,764 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-07-21 02:41:50,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-07-21 02:41:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-21 02:41:50,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:50,765 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:50,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-07-21 02:41:50,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:50,975 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:50,975 INFO L85 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2022-07-21 02:41:50,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:50,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365824265] [2022-07-21 02:41:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:50,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:51,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:51,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365824265] [2022-07-21 02:41:51,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365824265] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:51,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145131084] [2022-07-21 02:41:51,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:41:51,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:51,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:51,367 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:51,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-21 02:41:51,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-07-21 02:41:51,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:51,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 02:41:51,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:51,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:51,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145131084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:51,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:51,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2022-07-21 02:41:51,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056881902] [2022-07-21 02:41:51,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:51,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 02:41:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 02:41:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 02:41:51,710 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 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) [2022-07-21 02:41:52,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:52,139 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2022-07-21 02:41:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-21 02:41:52,139 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 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) Word has length 128 [2022-07-21 02:41:52,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:52,140 INFO L225 Difference]: With dead ends: 140 [2022-07-21 02:41:52,140 INFO L226 Difference]: Without dead ends: 138 [2022-07-21 02:41:52,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1757, Invalid=3073, Unknown=0, NotChecked=0, Total=4830 [2022-07-21 02:41:52,141 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:52,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 32 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-21 02:41:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2022-07-21 02:41:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:52,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-07-21 02:41:52,162 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2022-07-21 02:41:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:52,163 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-07-21 02:41:52,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 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) [2022-07-21 02:41:52,163 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-07-21 02:41:52,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-21 02:41:52,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:52,163 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:52,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-07-21 02:41:52,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:52,372 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:52,372 INFO L85 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2022-07-21 02:41:52,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:52,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89602011] [2022-07-21 02:41:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:52,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:53,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:53,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89602011] [2022-07-21 02:41:53,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89602011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:53,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692477528] [2022-07-21 02:41:53,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:41:53,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:53,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:53,368 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:53,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-21 02:41:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:53,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-21 02:41:53,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:54,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:54,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692477528] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:54,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:54,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 101 [2022-07-21 02:41:54,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949595195] [2022-07-21 02:41:54,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:54,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-21 02:41:54,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:54,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-21 02:41:54,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=7818, Unknown=0, NotChecked=0, Total=10100 [2022-07-21 02:41:54,924 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:55,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:55,768 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2022-07-21 02:41:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-21 02:41:55,768 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 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 131 [2022-07-21 02:41:55,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:55,769 INFO L225 Difference]: With dead ends: 233 [2022-07-21 02:41:55,769 INFO L226 Difference]: Without dead ends: 133 [2022-07-21 02:41:55,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4008 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3968, Invalid=13854, Unknown=0, NotChecked=0, Total=17822 [2022-07-21 02:41:55,770 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:55,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 387 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:41:55,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-21 02:41:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-07-21 02:41:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-07-21 02:41:55,793 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2022-07-21 02:41:55,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:55,794 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-07-21 02:41:55,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-07-21 02:41:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-21 02:41:55,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:55,794 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:55,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-07-21 02:41:56,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:56,007 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2022-07-21 02:41:56,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:56,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046620551] [2022-07-21 02:41:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:56,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:56,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:56,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046620551] [2022-07-21 02:41:56,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046620551] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:56,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820368851] [2022-07-21 02:41:56,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:41:56,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:56,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:56,415 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:56,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-21 02:41:56,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:41:56,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-21 02:41:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:41:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:56,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:41:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:56,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820368851] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:41:56,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:41:56,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 38 [2022-07-21 02:41:56,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111850931] [2022-07-21 02:41:56,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:41:56,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 02:41:56,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:41:56,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 02:41:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 02:41:56,751 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:41:57,197 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2022-07-21 02:41:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-21 02:41:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 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 132 [2022-07-21 02:41:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:41:57,198 INFO L225 Difference]: With dead ends: 144 [2022-07-21 02:41:57,198 INFO L226 Difference]: Without dead ends: 142 [2022-07-21 02:41:57,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1861, Invalid=3251, Unknown=0, NotChecked=0, Total=5112 [2022-07-21 02:41:57,199 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 79 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:41:57,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 35 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:41:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-21 02:41:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2022-07-21 02:41:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-07-21 02:41:57,217 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2022-07-21 02:41:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:41:57,218 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-07-21 02:41:57,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:41:57,218 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-07-21 02:41:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-21 02:41:57,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:41:57,219 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2022-07-21 02:41:57,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-07-21 02:41:57,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-07-21 02:41:57,431 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:41:57,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:41:57,431 INFO L85 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2022-07-21 02:41:57,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:41:57,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314779025] [2022-07-21 02:41:57,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:41:57,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:41:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:41:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1458 proven. 622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:41:58,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:41:58,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314779025] [2022-07-21 02:41:58,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314779025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:41:58,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734301795] [2022-07-21 02:41:58,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:41:58,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:41:58,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:41:58,481 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:41:58,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-21 02:41:58,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2022-07-21 02:41:58,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:41:58,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-21 02:41:58,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:00,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:00,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734301795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:00,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:00,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 104 [2022-07-21 02:42:00,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560409186] [2022-07-21 02:42:00,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:00,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-07-21 02:42:00,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:00,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-07-21 02:42:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=8293, Unknown=0, NotChecked=0, Total=10712 [2022-07-21 02:42:00,161 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:01,031 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2022-07-21 02:42:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-21 02:42:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 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 135 [2022-07-21 02:42:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:01,031 INFO L225 Difference]: With dead ends: 240 [2022-07-21 02:42:01,031 INFO L226 Difference]: Without dead ends: 137 [2022-07-21 02:42:01,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4207, Invalid=14699, Unknown=0, NotChecked=0, Total=18906 [2022-07-21 02:42:01,033 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:01,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 375 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-21 02:42:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-07-21 02:42:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-07-21 02:42:01,051 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2022-07-21 02:42:01,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:01,051 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-07-21 02:42:01,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-07-21 02:42:01,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-21 02:42:01,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:01,052 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:01,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-07-21 02:42:01,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:01,267 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:01,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:01,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2022-07-21 02:42:01,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:01,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940990282] [2022-07-21 02:42:01,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:01,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:01,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:01,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940990282] [2022-07-21 02:42:01,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940990282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:01,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657103126] [2022-07-21 02:42:01,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:42:01,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:01,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:01,700 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:01,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-21 02:42:01,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:42:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:01,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-21 02:42:01,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:01,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:02,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657103126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:02,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:02,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2022-07-21 02:42:02,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611992928] [2022-07-21 02:42:02,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:02,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 02:42:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 02:42:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 02:42:02,024 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:02,487 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2022-07-21 02:42:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-21 02:42:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 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 136 [2022-07-21 02:42:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:02,488 INFO L225 Difference]: With dead ends: 148 [2022-07-21 02:42:02,488 INFO L226 Difference]: Without dead ends: 146 [2022-07-21 02:42:02,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1968, Invalid=3434, Unknown=0, NotChecked=0, Total=5402 [2022-07-21 02:42:02,489 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:02,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 33 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:42:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-21 02:42:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-07-21 02:42:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2022-07-21 02:42:02,514 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2022-07-21 02:42:02,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:02,514 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2022-07-21 02:42:02,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2022-07-21 02:42:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-21 02:42:02,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:02,515 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:02,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:02,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-21 02:42:02,715 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2022-07-21 02:42:02,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:02,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628856200] [2022-07-21 02:42:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:02,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1553 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:03,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:03,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628856200] [2022-07-21 02:42:03,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628856200] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:03,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022061372] [2022-07-21 02:42:03,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:42:03,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:03,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:03,836 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:03,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-21 02:42:03,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2022-07-21 02:42:03,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:03,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-21 02:42:03,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:05,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:05,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022061372] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:05,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:05,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 107 [2022-07-21 02:42:05,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345799438] [2022-07-21 02:42:05,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:05,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-21 02:42:05,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:05,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-21 02:42:05,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=8782, Unknown=0, NotChecked=0, Total=11342 [2022-07-21 02:42:05,605 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:06,568 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2022-07-21 02:42:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-21 02:42:06,569 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 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 139 [2022-07-21 02:42:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:06,569 INFO L225 Difference]: With dead ends: 247 [2022-07-21 02:42:06,569 INFO L226 Difference]: Without dead ends: 141 [2022-07-21 02:42:06,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4497 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4453, Invalid=15569, Unknown=0, NotChecked=0, Total=20022 [2022-07-21 02:42:06,571 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:06,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 360 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:06,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-21 02:42:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-07-21 02:42:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-07-21 02:42:06,594 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2022-07-21 02:42:06,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:06,594 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-07-21 02:42:06,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-07-21 02:42:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-21 02:42:06,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:06,594 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:06,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-07-21 02:42:06,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-21 02:42:06,795 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:06,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2022-07-21 02:42:06,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:06,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279352234] [2022-07-21 02:42:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:06,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:07,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:07,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279352234] [2022-07-21 02:42:07,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279352234] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:07,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464818009] [2022-07-21 02:42:07,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:42:07,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:07,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:07,250 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:07,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-21 02:42:07,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-07-21 02:42:07,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-21 02:42:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:07,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:07,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464818009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:07,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:07,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2022-07-21 02:42:07,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788523817] [2022-07-21 02:42:07,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:07,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 02:42:07,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:07,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 02:42:07,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 02:42:07,690 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 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) [2022-07-21 02:42:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:08,189 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2022-07-21 02:42:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-21 02:42:08,190 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 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) Word has length 140 [2022-07-21 02:42:08,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:08,190 INFO L225 Difference]: With dead ends: 152 [2022-07-21 02:42:08,191 INFO L226 Difference]: Without dead ends: 150 [2022-07-21 02:42:08,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2078, Invalid=3622, Unknown=0, NotChecked=0, Total=5700 [2022-07-21 02:42:08,192 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:08,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 34 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-21 02:42:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2022-07-21 02:42:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2022-07-21 02:42:08,217 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2022-07-21 02:42:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:08,217 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2022-07-21 02:42:08,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 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) [2022-07-21 02:42:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2022-07-21 02:42:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-21 02:42:08,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:08,218 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:08,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-07-21 02:42:08,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-21 02:42:08,418 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:08,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2022-07-21 02:42:08,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:08,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672705777] [2022-07-21 02:42:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:08,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1651 proven. 695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:09,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672705777] [2022-07-21 02:42:09,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672705777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551180973] [2022-07-21 02:42:09,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:42:09,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:09,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:09,620 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:09,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-21 02:42:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:09,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 02:42:09,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:11,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:11,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551180973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:11,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:11,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 110 [2022-07-21 02:42:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231972250] [2022-07-21 02:42:11,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-07-21 02:42:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-07-21 02:42:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=9285, Unknown=0, NotChecked=0, Total=11990 [2022-07-21 02:42:11,437 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:12,384 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2022-07-21 02:42:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-21 02:42:12,384 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 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 143 [2022-07-21 02:42:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:12,385 INFO L225 Difference]: With dead ends: 254 [2022-07-21 02:42:12,385 INFO L226 Difference]: Without dead ends: 145 [2022-07-21 02:42:12,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4706, Invalid=16464, Unknown=0, NotChecked=0, Total=21170 [2022-07-21 02:42:12,386 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:12,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 301 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:12,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-21 02:42:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-07-21 02:42:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 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) [2022-07-21 02:42:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-07-21 02:42:12,407 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2022-07-21 02:42:12,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:12,407 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-07-21 02:42:12,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:12,407 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-07-21 02:42:12,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-21 02:42:12,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:12,408 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:12,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-07-21 02:42:12,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-21 02:42:12,618 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:12,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1532781588, now seen corresponding path program 68 times [2022-07-21 02:42:12,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:12,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837659336] [2022-07-21 02:42:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:12,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:13,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:13,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837659336] [2022-07-21 02:42:13,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837659336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:13,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979905674] [2022-07-21 02:42:13,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:42:13,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:13,078 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:13,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-21 02:42:13,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:42:13,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:13,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-21 02:42:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:13,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:13,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979905674] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:13,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:13,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 41 [2022-07-21 02:42:13,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503903756] [2022-07-21 02:42:13,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:13,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 02:42:13,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 02:42:13,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 02:42:13,418 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:13,916 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2022-07-21 02:42:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-21 02:42:13,916 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 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 144 [2022-07-21 02:42:13,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:13,917 INFO L225 Difference]: With dead ends: 156 [2022-07-21 02:42:13,917 INFO L226 Difference]: Without dead ends: 154 [2022-07-21 02:42:13,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2191, Invalid=3815, Unknown=0, NotChecked=0, Total=6006 [2022-07-21 02:42:13,918 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:13,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 41 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-21 02:42:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2022-07-21 02:42:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 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) [2022-07-21 02:42:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-07-21 02:42:13,950 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2022-07-21 02:42:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:13,950 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-07-21 02:42:13,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-07-21 02:42:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-21 02:42:13,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:13,951 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:13,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:14,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:14,169 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:14,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1000823245, now seen corresponding path program 69 times [2022-07-21 02:42:14,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:14,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882749398] [2022-07-21 02:42:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:14,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1752 proven. 733 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:15,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:15,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882749398] [2022-07-21 02:42:15,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882749398] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:15,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089793894] [2022-07-21 02:42:15,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:42:15,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:15,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:15,401 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:15,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-21 02:42:15,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2022-07-21 02:42:15,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:15,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-21 02:42:15,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:17,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:17,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089793894] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:17,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:17,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 113 [2022-07-21 02:42:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051932382] [2022-07-21 02:42:17,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:17,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-07-21 02:42:17,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-07-21 02:42:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=9802, Unknown=0, NotChecked=0, Total=12656 [2022-07-21 02:42:17,357 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:18,369 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2022-07-21 02:42:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-21 02:42:18,369 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 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 147 [2022-07-21 02:42:18,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:18,370 INFO L225 Difference]: With dead ends: 261 [2022-07-21 02:42:18,370 INFO L226 Difference]: Without dead ends: 149 [2022-07-21 02:42:18,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5014 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4966, Invalid=17384, Unknown=0, NotChecked=0, Total=22350 [2022-07-21 02:42:18,371 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:18,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 368 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-21 02:42:18,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-07-21 02:42:18,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-07-21 02:42:18,393 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2022-07-21 02:42:18,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:18,393 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-07-21 02:42:18,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:18,393 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-07-21 02:42:18,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-21 02:42:18,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:18,394 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:18,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-07-21 02:42:18,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:18,603 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1597865864, now seen corresponding path program 70 times [2022-07-21 02:42:18,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:18,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778943466] [2022-07-21 02:42:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:18,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:19,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:19,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778943466] [2022-07-21 02:42:19,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778943466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:19,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736231710] [2022-07-21 02:42:19,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:42:19,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:19,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:19,094 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:19,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-21 02:42:19,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:42:19,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:19,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-21 02:42:19,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:19,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:19,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736231710] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:19,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:19,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 42 [2022-07-21 02:42:19,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43046141] [2022-07-21 02:42:19,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:19,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 02:42:19,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:19,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 02:42:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 02:42:19,494 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:20,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:20,020 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2022-07-21 02:42:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-21 02:42:20,020 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-07-21 02:42:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:20,021 INFO L225 Difference]: With dead ends: 160 [2022-07-21 02:42:20,021 INFO L226 Difference]: Without dead ends: 158 [2022-07-21 02:42:20,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 327 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2307, Invalid=4013, Unknown=0, NotChecked=0, Total=6320 [2022-07-21 02:42:20,022 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 126 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:20,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 32 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-21 02:42:20,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2022-07-21 02:42:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-07-21 02:42:20,049 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2022-07-21 02:42:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:20,049 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-07-21 02:42:20,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-07-21 02:42:20,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-21 02:42:20,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:20,050 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:20,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-07-21 02:42:20,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:20,250 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:20,251 INFO L85 PathProgramCache]: Analyzing trace with hash 904233137, now seen corresponding path program 71 times [2022-07-21 02:42:20,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:20,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988546371] [2022-07-21 02:42:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:20,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1856 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:21,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:21,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988546371] [2022-07-21 02:42:21,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988546371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:21,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802440186] [2022-07-21 02:42:21,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:42:21,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:21,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:21,551 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:21,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-21 02:42:21,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2022-07-21 02:42:21,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:21,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-21 02:42:21,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:23,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:23,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802440186] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:23,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:23,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 116 [2022-07-21 02:42:23,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883864354] [2022-07-21 02:42:23,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:23,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-21 02:42:23,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:23,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-21 02:42:23,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=10333, Unknown=0, NotChecked=0, Total=13340 [2022-07-21 02:42:23,594 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:24,714 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2022-07-21 02:42:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-21 02:42:24,714 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 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 151 [2022-07-21 02:42:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:24,715 INFO L225 Difference]: With dead ends: 268 [2022-07-21 02:42:24,715 INFO L226 Difference]: Without dead ends: 153 [2022-07-21 02:42:24,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5233, Invalid=18329, Unknown=0, NotChecked=0, Total=23562 [2022-07-21 02:42:24,716 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:24,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 498 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:42:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-21 02:42:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-07-21 02:42:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2022-07-21 02:42:24,739 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2022-07-21 02:42:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:24,739 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2022-07-21 02:42:24,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2022-07-21 02:42:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-21 02:42:24,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:24,740 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:24,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:24,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-07-21 02:42:24,957 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1305718548, now seen corresponding path program 72 times [2022-07-21 02:42:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:24,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470995768] [2022-07-21 02:42:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:25,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:25,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470995768] [2022-07-21 02:42:25,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470995768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:25,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953016298] [2022-07-21 02:42:25,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:42:25,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:25,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:25,477 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:25,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-21 02:42:25,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-07-21 02:42:25,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:25,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 02:42:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:25,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:25,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953016298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:25,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:25,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 43 [2022-07-21 02:42:25,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424065891] [2022-07-21 02:42:25,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:25,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 02:42:25,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 02:42:25,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 02:42:25,877 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:26,433 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2022-07-21 02:42:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-21 02:42:26,433 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-07-21 02:42:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:26,434 INFO L225 Difference]: With dead ends: 164 [2022-07-21 02:42:26,434 INFO L226 Difference]: Without dead ends: 162 [2022-07-21 02:42:26,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2426, Invalid=4216, Unknown=0, NotChecked=0, Total=6642 [2022-07-21 02:42:26,435 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:26,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 23 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-21 02:42:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2022-07-21 02:42:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-07-21 02:42:26,465 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2022-07-21 02:42:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:26,465 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-07-21 02:42:26,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:26,465 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-07-21 02:42:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-21 02:42:26,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:26,466 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:26,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-07-21 02:42:26,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:26,666 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:26,666 INFO L85 PathProgramCache]: Analyzing trace with hash 862356685, now seen corresponding path program 73 times [2022-07-21 02:42:26,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:26,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125208981] [2022-07-21 02:42:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:26,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1963 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:28,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:28,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125208981] [2022-07-21 02:42:28,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125208981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:28,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529994678] [2022-07-21 02:42:28,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:42:28,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:28,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:28,048 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:28,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-21 02:42:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:28,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-21 02:42:28,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:29,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:30,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529994678] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:30,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:30,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 119 [2022-07-21 02:42:30,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140047545] [2022-07-21 02:42:30,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:30,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-07-21 02:42:30,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-07-21 02:42:30,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=10878, Unknown=0, NotChecked=0, Total=14042 [2022-07-21 02:42:30,118 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:31,342 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2022-07-21 02:42:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-21 02:42:31,343 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-07-21 02:42:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:31,343 INFO L225 Difference]: With dead ends: 275 [2022-07-21 02:42:31,343 INFO L226 Difference]: Without dead ends: 157 [2022-07-21 02:42:31,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5559 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5507, Invalid=19299, Unknown=0, NotChecked=0, Total=24806 [2022-07-21 02:42:31,344 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 11 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:31,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 615 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:42:31,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-21 02:42:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-07-21 02:42:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 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) [2022-07-21 02:42:31,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-07-21 02:42:31,369 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2022-07-21 02:42:31,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:31,369 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-07-21 02:42:31,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:31,369 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-07-21 02:42:31,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-21 02:42:31,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:31,370 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:31,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:31,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:31,579 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1828405368, now seen corresponding path program 74 times [2022-07-21 02:42:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:31,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644999646] [2022-07-21 02:42:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:31,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 703 proven. 2110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:32,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:32,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644999646] [2022-07-21 02:42:32,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644999646] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:32,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069059216] [2022-07-21 02:42:32,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:42:32,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:32,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:32,111 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:32,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-21 02:42:32,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:42:32,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:32,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-21 02:42:32,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:32,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:32,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069059216] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:32,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:32,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 44 [2022-07-21 02:42:32,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992137367] [2022-07-21 02:42:32,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:32,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 02:42:32,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:32,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 02:42:32,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 02:42:32,483 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 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) [2022-07-21 02:42:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:33,042 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2022-07-21 02:42:33,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-21 02:42:33,042 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 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) Word has length 156 [2022-07-21 02:42:33,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:33,043 INFO L225 Difference]: With dead ends: 168 [2022-07-21 02:42:33,043 INFO L226 Difference]: Without dead ends: 166 [2022-07-21 02:42:33,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 345 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2548, Invalid=4424, Unknown=0, NotChecked=0, Total=6972 [2022-07-21 02:42:33,044 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 89 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:33,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 41 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-21 02:42:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2022-07-21 02:42:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2022-07-21 02:42:33,073 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2022-07-21 02:42:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:33,074 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2022-07-21 02:42:33,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 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) [2022-07-21 02:42:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2022-07-21 02:42:33,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-21 02:42:33,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:33,074 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:33,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:33,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-07-21 02:42:33,287 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:33,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:33,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1244249935, now seen corresponding path program 75 times [2022-07-21 02:42:33,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:33,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930541636] [2022-07-21 02:42:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:33,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2073 proven. 853 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:34,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:34,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930541636] [2022-07-21 02:42:34,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930541636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:34,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760895478] [2022-07-21 02:42:34,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:42:34,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:34,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:34,720 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:34,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-21 02:42:34,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2022-07-21 02:42:34,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:34,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-21 02:42:34,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:36,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:36,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760895478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:36,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:36,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 122 [2022-07-21 02:42:36,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466320626] [2022-07-21 02:42:36,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:36,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-07-21 02:42:36,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:36,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-07-21 02:42:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=11437, Unknown=0, NotChecked=0, Total=14762 [2022-07-21 02:42:36,934 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:38,219 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2022-07-21 02:42:38,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-21 02:42:38,219 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2022-07-21 02:42:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:38,220 INFO L225 Difference]: With dead ends: 282 [2022-07-21 02:42:38,220 INFO L226 Difference]: Without dead ends: 161 [2022-07-21 02:42:38,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5842 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5788, Invalid=20294, Unknown=0, NotChecked=0, Total=26082 [2022-07-21 02:42:38,221 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:38,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 526 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:42:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-21 02:42:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-07-21 02:42:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2022-07-21 02:42:38,247 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 159 [2022-07-21 02:42:38,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:38,247 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2022-07-21 02:42:38,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2022-07-21 02:42:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-21 02:42:38,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:38,248 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:38,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:38,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-07-21 02:42:38,463 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:38,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1376953836, now seen corresponding path program 76 times [2022-07-21 02:42:38,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:38,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131669725] [2022-07-21 02:42:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:38,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 741 proven. 2224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:39,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:39,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131669725] [2022-07-21 02:42:39,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131669725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:39,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893146682] [2022-07-21 02:42:39,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:42:39,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:39,049 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:39,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-21 02:42:39,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:42:39,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:39,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-21 02:42:39,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:39,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:39,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893146682] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:39,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:39,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 45 [2022-07-21 02:42:39,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244931013] [2022-07-21 02:42:39,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:39,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 02:42:39,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:39,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 02:42:39,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 02:42:39,447 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:40,059 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2022-07-21 02:42:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-21 02:42:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-07-21 02:42:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:40,063 INFO L225 Difference]: With dead ends: 172 [2022-07-21 02:42:40,063 INFO L226 Difference]: Without dead ends: 170 [2022-07-21 02:42:40,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2673, Invalid=4637, Unknown=0, NotChecked=0, Total=7310 [2022-07-21 02:42:40,064 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 170 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:40,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 34 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-21 02:42:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2022-07-21 02:42:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2022-07-21 02:42:40,091 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 160 [2022-07-21 02:42:40,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:40,091 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2022-07-21 02:42:40,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:40,091 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2022-07-21 02:42:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-21 02:42:40,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:40,092 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:40,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-07-21 02:42:40,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:40,308 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash -396095539, now seen corresponding path program 77 times [2022-07-21 02:42:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:40,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144676109] [2022-07-21 02:42:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:40,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2186 proven. 895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:41,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:41,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144676109] [2022-07-21 02:42:41,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144676109] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:41,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897306319] [2022-07-21 02:42:41,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:42:41,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:41,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:41,814 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:41,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-21 02:42:41,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2022-07-21 02:42:41,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:41,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-21 02:42:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:43,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:44,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897306319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:44,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:44,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 125 [2022-07-21 02:42:44,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034348906] [2022-07-21 02:42:44,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:44,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-07-21 02:42:44,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:44,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-07-21 02:42:44,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=12010, Unknown=0, NotChecked=0, Total=15500 [2022-07-21 02:42:44,148 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:45,382 INFO L93 Difference]: Finished difference Result 289 states and 291 transitions. [2022-07-21 02:42:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-21 02:42:45,382 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 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 163 [2022-07-21 02:42:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:45,383 INFO L225 Difference]: With dead ends: 289 [2022-07-21 02:42:45,383 INFO L226 Difference]: Without dead ends: 165 [2022-07-21 02:42:45,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6132 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6076, Invalid=21314, Unknown=0, NotChecked=0, Total=27390 [2022-07-21 02:42:45,384 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:45,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 450 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:42:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-21 02:42:45,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-21 02:42:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-07-21 02:42:45,410 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 163 [2022-07-21 02:42:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:45,410 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-07-21 02:42:45,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-07-21 02:42:45,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-21 02:42:45,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:45,411 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:45,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-07-21 02:42:45,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:45,611 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:45,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1725603960, now seen corresponding path program 78 times [2022-07-21 02:42:45,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:45,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130347295] [2022-07-21 02:42:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:45,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 780 proven. 2341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:46,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:46,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130347295] [2022-07-21 02:42:46,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130347295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:46,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670690269] [2022-07-21 02:42:46,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:42:46,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:46,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:46,195 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:46,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-21 02:42:46,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-07-21 02:42:46,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-21 02:42:46,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:46,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:46,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670690269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:46,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:46,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 46 [2022-07-21 02:42:46,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206166988] [2022-07-21 02:42:46,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:46,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 02:42:46,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 02:42:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 02:42:46,615 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:47,228 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2022-07-21 02:42:47,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-21 02:42:47,228 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-07-21 02:42:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:47,229 INFO L225 Difference]: With dead ends: 176 [2022-07-21 02:42:47,229 INFO L226 Difference]: Without dead ends: 174 [2022-07-21 02:42:47,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2801, Invalid=4855, Unknown=0, NotChecked=0, Total=7656 [2022-07-21 02:42:47,230 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 132 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:47,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 41 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:47,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-21 02:42:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2022-07-21 02:42:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2022-07-21 02:42:47,257 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 164 [2022-07-21 02:42:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:47,257 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2022-07-21 02:42:47,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2022-07-21 02:42:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-21 02:42:47,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:47,258 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:47,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:47,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-07-21 02:42:47,458 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash -999186255, now seen corresponding path program 79 times [2022-07-21 02:42:47,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:47,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072810855] [2022-07-21 02:42:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:47,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2302 proven. 938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:49,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:49,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072810855] [2022-07-21 02:42:49,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072810855] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:49,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065215278] [2022-07-21 02:42:49,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:42:49,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:49,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:49,037 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:49,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-21 02:42:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:49,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-21 02:42:49,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:51,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:51,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065215278] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:51,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:51,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 128 [2022-07-21 02:42:51,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649503610] [2022-07-21 02:42:51,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:51,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-21 02:42:51,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:51,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-21 02:42:51,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=12597, Unknown=0, NotChecked=0, Total=16256 [2022-07-21 02:42:51,376 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:52,615 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2022-07-21 02:42:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-21 02:42:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 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 167 [2022-07-21 02:42:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:52,615 INFO L225 Difference]: With dead ends: 296 [2022-07-21 02:42:52,615 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 02:42:52,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6429 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6371, Invalid=22359, Unknown=0, NotChecked=0, Total=28730 [2022-07-21 02:42:52,617 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 11 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:52,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 436 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 02:42:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-21 02:42:52,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-07-21 02:42:52,644 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 167 [2022-07-21 02:42:52,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:52,644 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-07-21 02:42:52,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-07-21 02:42:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-21 02:42:52,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:52,645 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:52,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:52,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:52,846 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:52,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:52,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1874945300, now seen corresponding path program 80 times [2022-07-21 02:42:52,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:52,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105762547] [2022-07-21 02:42:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:52,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 820 proven. 2461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:53,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:53,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105762547] [2022-07-21 02:42:53,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105762547] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:53,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191871400] [2022-07-21 02:42:53,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:42:53,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:53,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:53,464 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:53,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-21 02:42:53,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:42:53,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:53,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-21 02:42:53,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:53,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:53,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191871400] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:53,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:53,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 47 [2022-07-21 02:42:53,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314490933] [2022-07-21 02:42:53,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:53,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 02:42:53,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:53,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 02:42:53,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 02:42:53,847 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:54,485 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2022-07-21 02:42:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-21 02:42:54,486 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-07-21 02:42:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:54,486 INFO L225 Difference]: With dead ends: 180 [2022-07-21 02:42:54,486 INFO L226 Difference]: Without dead ends: 178 [2022-07-21 02:42:54,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 372 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2932, Invalid=5078, Unknown=0, NotChecked=0, Total=8010 [2022-07-21 02:42:54,487 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 97 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:54,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 35 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:42:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-21 02:42:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2022-07-21 02:42:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-07-21 02:42:54,529 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 168 [2022-07-21 02:42:54,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:54,530 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-07-21 02:42:54,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-07-21 02:42:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-21 02:42:54,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:54,531 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:54,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-07-21 02:42:54,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:54,740 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:54,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:54,741 INFO L85 PathProgramCache]: Analyzing trace with hash -440927539, now seen corresponding path program 81 times [2022-07-21 02:42:54,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:54,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781455479] [2022-07-21 02:42:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:54,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2421 proven. 982 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:56,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:56,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781455479] [2022-07-21 02:42:56,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781455479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:56,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482796058] [2022-07-21 02:42:56,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:42:56,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:56,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:56,383 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:42:56,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-07-21 02:42:56,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2022-07-21 02:42:56,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:56,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-21 02:42:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:58,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:58,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482796058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:58,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:58,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 131 [2022-07-21 02:42:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373841118] [2022-07-21 02:42:58,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:58,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-07-21 02:42:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-07-21 02:42:58,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=13198, Unknown=0, NotChecked=0, Total=17030 [2022-07-21 02:42:58,878 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:00,236 INFO L93 Difference]: Finished difference Result 303 states and 305 transitions. [2022-07-21 02:43:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-21 02:43:00,236 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 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 171 [2022-07-21 02:43:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:00,236 INFO L225 Difference]: With dead ends: 303 [2022-07-21 02:43:00,236 INFO L226 Difference]: Without dead ends: 173 [2022-07-21 02:43:00,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6733 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6673, Invalid=23429, Unknown=0, NotChecked=0, Total=30102 [2022-07-21 02:43:00,238 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:00,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 520 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:43:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-21 02:43:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-07-21 02:43:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2022-07-21 02:43:00,267 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 171 [2022-07-21 02:43:00,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:00,267 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2022-07-21 02:43:00,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2022-07-21 02:43:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-21 02:43:00,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:00,268 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:00,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:00,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-07-21 02:43:00,483 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1313382520, now seen corresponding path program 82 times [2022-07-21 02:43:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:00,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312830735] [2022-07-21 02:43:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:00,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 861 proven. 2584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:01,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:01,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312830735] [2022-07-21 02:43:01,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312830735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:01,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942474766] [2022-07-21 02:43:01,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:43:01,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:01,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:01,109 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:01,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-07-21 02:43:01,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:43:01,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:01,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-21 02:43:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:01,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:01,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942474766] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:01,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:01,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 48 [2022-07-21 02:43:01,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734981496] [2022-07-21 02:43:01,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:01,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 02:43:01,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:01,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 02:43:01,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 02:43:01,524 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:02,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:02,173 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2022-07-21 02:43:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-21 02:43:02,174 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 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 172 [2022-07-21 02:43:02,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:02,174 INFO L225 Difference]: With dead ends: 184 [2022-07-21 02:43:02,174 INFO L226 Difference]: Without dead ends: 182 [2022-07-21 02:43:02,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 381 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3066, Invalid=5306, Unknown=0, NotChecked=0, Total=8372 [2022-07-21 02:43:02,175 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:02,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 37 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:43:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-21 02:43:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2022-07-21 02:43:02,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2022-07-21 02:43:02,205 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2022-07-21 02:43:02,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:02,206 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2022-07-21 02:43:02,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:02,206 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2022-07-21 02:43:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-21 02:43:02,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:02,206 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:02,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-07-21 02:43:02,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:02,416 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:02,416 INFO L85 PathProgramCache]: Analyzing trace with hash 178233521, now seen corresponding path program 83 times [2022-07-21 02:43:02,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:02,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896518228] [2022-07-21 02:43:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:02,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2543 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:04,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:04,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896518228] [2022-07-21 02:43:04,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896518228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:04,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984467] [2022-07-21 02:43:04,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:43:04,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:04,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:04,144 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:04,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-07-21 02:43:04,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2022-07-21 02:43:04,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:04,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-21 02:43:04,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:06,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:06,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984467] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:06,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:06,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 134 [2022-07-21 02:43:06,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793238758] [2022-07-21 02:43:06,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:06,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-07-21 02:43:06,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:06,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-07-21 02:43:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=13813, Unknown=0, NotChecked=0, Total=17822 [2022-07-21 02:43:06,732 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:08,212 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2022-07-21 02:43:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-21 02:43:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 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 175 [2022-07-21 02:43:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:08,213 INFO L225 Difference]: With dead ends: 310 [2022-07-21 02:43:08,213 INFO L226 Difference]: Without dead ends: 177 [2022-07-21 02:43:08,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7044 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6982, Invalid=24524, Unknown=0, NotChecked=0, Total=31506 [2022-07-21 02:43:08,214 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:08,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 651 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 02:43:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-21 02:43:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-07-21 02:43:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 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) [2022-07-21 02:43:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-07-21 02:43:08,245 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 175 [2022-07-21 02:43:08,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:08,246 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-07-21 02:43:08,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-07-21 02:43:08,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-21 02:43:08,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:08,247 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:08,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:08,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:08,471 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:08,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1251487724, now seen corresponding path program 84 times [2022-07-21 02:43:08,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:08,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617494094] [2022-07-21 02:43:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:08,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 903 proven. 2710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:09,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:09,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617494094] [2022-07-21 02:43:09,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617494094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:09,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180184380] [2022-07-21 02:43:09,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:43:09,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:09,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:09,138 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:09,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-07-21 02:43:09,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-07-21 02:43:09,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-21 02:43:09,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:09,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:09,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180184380] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:09,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:09,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 49 [2022-07-21 02:43:09,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075753225] [2022-07-21 02:43:09,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:09,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 02:43:09,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:09,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 02:43:09,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 02:43:09,587 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:10,267 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2022-07-21 02:43:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-21 02:43:10,268 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 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 176 [2022-07-21 02:43:10,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:10,268 INFO L225 Difference]: With dead ends: 188 [2022-07-21 02:43:10,268 INFO L226 Difference]: Without dead ends: 186 [2022-07-21 02:43:10,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 390 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2191 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3203, Invalid=5539, Unknown=0, NotChecked=0, Total=8742 [2022-07-21 02:43:10,269 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 140 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:10,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 29 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:43:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-21 02:43:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2022-07-21 02:43:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-07-21 02:43:10,301 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 176 [2022-07-21 02:43:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:10,302 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-07-21 02:43:10,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:10,302 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-07-21 02:43:10,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-21 02:43:10,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:10,303 INFO L195 NwaCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:10,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:10,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:10,520 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1535490611, now seen corresponding path program 85 times [2022-07-21 02:43:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:10,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868537540] [2022-07-21 02:43:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:10,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2668 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:12,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:12,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868537540] [2022-07-21 02:43:12,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868537540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:12,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314510238] [2022-07-21 02:43:12,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:43:12,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:12,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:12,332 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:12,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-07-21 02:43:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:12,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-21 02:43:12,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:14,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:14,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314510238] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:14,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:14,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 137 [2022-07-21 02:43:14,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454394960] [2022-07-21 02:43:14,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:14,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-07-21 02:43:14,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:14,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-07-21 02:43:14,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=14442, Unknown=0, NotChecked=0, Total=18632 [2022-07-21 02:43:14,989 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:16,468 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2022-07-21 02:43:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-21 02:43:16,468 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 states have internal predecessors, (316), 0 states have call successors, (0), 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 179 [2022-07-21 02:43:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:16,469 INFO L225 Difference]: With dead ends: 317 [2022-07-21 02:43:16,469 INFO L226 Difference]: Without dead ends: 181 [2022-07-21 02:43:16,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7362 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7298, Invalid=25644, Unknown=0, NotChecked=0, Total=32942 [2022-07-21 02:43:16,471 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:16,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 567 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:43:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-21 02:43:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-07-21 02:43:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-07-21 02:43:16,522 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 179 [2022-07-21 02:43:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:16,522 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-07-21 02:43:16,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-07-21 02:43:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-21 02:43:16,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:16,523 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:16,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:16,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:16,733 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash 181583752, now seen corresponding path program 86 times [2022-07-21 02:43:16,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:16,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292357793] [2022-07-21 02:43:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:16,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 946 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:17,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:17,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292357793] [2022-07-21 02:43:17,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292357793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:17,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347235101] [2022-07-21 02:43:17,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:43:17,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:17,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:17,416 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:17,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-07-21 02:43:17,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:43:17,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:17,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-21 02:43:17,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:17,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:17,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347235101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:17,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:17,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 50 [2022-07-21 02:43:17,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510239400] [2022-07-21 02:43:17,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:17,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 02:43:17,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 02:43:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 02:43:17,838 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:18,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:18,567 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2022-07-21 02:43:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-21 02:43:18,568 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 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 180 [2022-07-21 02:43:18,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:18,568 INFO L225 Difference]: With dead ends: 192 [2022-07-21 02:43:18,568 INFO L226 Difference]: Without dead ends: 190 [2022-07-21 02:43:18,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 399 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3343, Invalid=5777, Unknown=0, NotChecked=0, Total=9120 [2022-07-21 02:43:18,569 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 188 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:18,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 37 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:43:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-21 02:43:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2022-07-21 02:43:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-07-21 02:43:18,601 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 180 [2022-07-21 02:43:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:18,601 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-07-21 02:43:18,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-07-21 02:43:18,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-21 02:43:18,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:18,603 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:18,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:18,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:18,804 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2092416847, now seen corresponding path program 87 times [2022-07-21 02:43:18,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:18,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279481713] [2022-07-21 02:43:18,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:18,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2796 proven. 1120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:20,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:20,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279481713] [2022-07-21 02:43:20,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279481713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:20,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494192316] [2022-07-21 02:43:20,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:43:20,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:20,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:20,687 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:20,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-07-21 02:43:20,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2022-07-21 02:43:20,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:20,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-21 02:43:20,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:23,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:23,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494192316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:23,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:23,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 140 [2022-07-21 02:43:23,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568851122] [2022-07-21 02:43:23,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:23,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-07-21 02:43:23,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-07-21 02:43:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=15085, Unknown=0, NotChecked=0, Total=19460 [2022-07-21 02:43:23,524 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:25,028 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2022-07-21 02:43:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-21 02:43:25,028 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2022-07-21 02:43:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:25,029 INFO L225 Difference]: With dead ends: 324 [2022-07-21 02:43:25,029 INFO L226 Difference]: Without dead ends: 185 [2022-07-21 02:43:25,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7687 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=7621, Invalid=26789, Unknown=0, NotChecked=0, Total=34410 [2022-07-21 02:43:25,031 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:25,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 528 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:43:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-21 02:43:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-07-21 02:43:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-07-21 02:43:25,064 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 183 [2022-07-21 02:43:25,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:25,064 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-07-21 02:43:25,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-07-21 02:43:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-21 02:43:25,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:25,065 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:25,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:25,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-07-21 02:43:25,276 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:25,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1324915476, now seen corresponding path program 88 times [2022-07-21 02:43:25,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:25,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081947941] [2022-07-21 02:43:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:25,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 990 proven. 2971 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:26,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:26,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081947941] [2022-07-21 02:43:26,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081947941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:26,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555534957] [2022-07-21 02:43:26,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:43:26,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:26,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:26,044 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:26,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-07-21 02:43:26,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:43:26,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:26,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-21 02:43:26,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:26,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:26,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555534957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:26,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:26,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 51 [2022-07-21 02:43:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093968488] [2022-07-21 02:43:26,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:26,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 02:43:26,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 02:43:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 02:43:26,501 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:27,225 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2022-07-21 02:43:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-21 02:43:27,225 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 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 184 [2022-07-21 02:43:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:27,226 INFO L225 Difference]: With dead ends: 196 [2022-07-21 02:43:27,226 INFO L226 Difference]: Without dead ends: 194 [2022-07-21 02:43:27,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 408 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2383 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3486, Invalid=6020, Unknown=0, NotChecked=0, Total=9506 [2022-07-21 02:43:27,226 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 99 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:27,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 47 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:43:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-21 02:43:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2022-07-21 02:43:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2022-07-21 02:43:27,260 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 184 [2022-07-21 02:43:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:27,260 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2022-07-21 02:43:27,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2022-07-21 02:43:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-21 02:43:27,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:27,261 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:27,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-07-21 02:43:27,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-07-21 02:43:27,461 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:27,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:27,462 INFO L85 PathProgramCache]: Analyzing trace with hash 197325005, now seen corresponding path program 89 times [2022-07-21 02:43:27,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:27,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595191533] [2022-07-21 02:43:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:27,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 2927 proven. 1168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:29,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:29,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595191533] [2022-07-21 02:43:29,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595191533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:29,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534812045] [2022-07-21 02:43:29,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:43:29,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:29,430 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:29,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-07-21 02:43:29,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-07-21 02:43:29,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:29,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-21 02:43:29,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:32,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:32,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534812045] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:32,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:32,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 143 [2022-07-21 02:43:32,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234348857] [2022-07-21 02:43:32,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:32,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-07-21 02:43:32,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:32,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-07-21 02:43:32,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=15742, Unknown=0, NotChecked=0, Total=20306 [2022-07-21 02:43:32,351 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:33,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:33,893 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2022-07-21 02:43:33,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-21 02:43:33,894 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 states have internal predecessors, (330), 0 states have call successors, (0), 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 187 [2022-07-21 02:43:33,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:33,894 INFO L225 Difference]: With dead ends: 331 [2022-07-21 02:43:33,894 INFO L226 Difference]: Without dead ends: 189 [2022-07-21 02:43:33,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8019 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7951, Invalid=27959, Unknown=0, NotChecked=0, Total=35910 [2022-07-21 02:43:33,896 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 11 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:33,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 493 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:43:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-21 02:43:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-07-21 02:43:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-07-21 02:43:33,937 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 187 [2022-07-21 02:43:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:33,937 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-07-21 02:43:33,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-07-21 02:43:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-21 02:43:33,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:33,938 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:33,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:34,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:34,147 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:34,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1083146120, now seen corresponding path program 90 times [2022-07-21 02:43:34,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:34,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845265739] [2022-07-21 02:43:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:34,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1035 proven. 3106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:34,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:34,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845265739] [2022-07-21 02:43:34,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845265739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:34,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030781683] [2022-07-21 02:43:34,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:43:34,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:34,887 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:34,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-07-21 02:43:35,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-07-21 02:43:35,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:35,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-21 02:43:35,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:35,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:35,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030781683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:35,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:35,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 52 [2022-07-21 02:43:35,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718906604] [2022-07-21 02:43:35,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:35,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 02:43:35,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:35,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 02:43:35,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 02:43:35,395 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:36,134 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2022-07-21 02:43:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-21 02:43:36,135 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 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 188 [2022-07-21 02:43:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:36,135 INFO L225 Difference]: With dead ends: 200 [2022-07-21 02:43:36,135 INFO L226 Difference]: Without dead ends: 198 [2022-07-21 02:43:36,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 417 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3632, Invalid=6268, Unknown=0, NotChecked=0, Total=9900 [2022-07-21 02:43:36,136 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 151 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:36,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 35 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:43:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-21 02:43:36,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2022-07-21 02:43:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2022-07-21 02:43:36,171 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 188 [2022-07-21 02:43:36,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:36,171 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2022-07-21 02:43:36,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2022-07-21 02:43:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-21 02:43:36,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:36,172 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:36,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-07-21 02:43:36,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:36,372 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:36,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:36,373 INFO L85 PathProgramCache]: Analyzing trace with hash -78413647, now seen corresponding path program 91 times [2022-07-21 02:43:36,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:36,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701982501] [2022-07-21 02:43:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:36,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3061 proven. 1217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:38,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:38,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701982501] [2022-07-21 02:43:38,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701982501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:38,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158398623] [2022-07-21 02:43:38,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:43:38,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:38,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:38,428 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:38,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-07-21 02:43:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:38,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-21 02:43:38,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:41,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:41,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158398623] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:41,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:41,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 146 [2022-07-21 02:43:41,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648244158] [2022-07-21 02:43:41,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:41,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-07-21 02:43:41,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-07-21 02:43:41,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4757, Invalid=16413, Unknown=0, NotChecked=0, Total=21170 [2022-07-21 02:43:41,413 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:43,079 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2022-07-21 02:43:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-21 02:43:43,079 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 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 191 [2022-07-21 02:43:43,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:43,080 INFO L225 Difference]: With dead ends: 338 [2022-07-21 02:43:43,080 INFO L226 Difference]: Without dead ends: 193 [2022-07-21 02:43:43,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8358 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8288, Invalid=29154, Unknown=0, NotChecked=0, Total=37442 [2022-07-21 02:43:43,081 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 11 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:43,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 629 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:43:43,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-21 02:43:43,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-07-21 02:43:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-07-21 02:43:43,116 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 191 [2022-07-21 02:43:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:43,117 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-07-21 02:43:43,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-07-21 02:43:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-21 02:43:43,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:43,117 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:43,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:43,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:43,318 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash -982238740, now seen corresponding path program 92 times [2022-07-21 02:43:43,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:43,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92289179] [2022-07-21 02:43:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:43,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1081 proven. 3244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:44,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:44,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92289179] [2022-07-21 02:43:44,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92289179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:44,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941629651] [2022-07-21 02:43:44,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:43:44,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:44,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:44,106 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:44,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-07-21 02:43:44,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:43:44,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:44,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-21 02:43:44,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:44,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:44,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941629651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:44,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:44,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 53 [2022-07-21 02:43:44,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894280509] [2022-07-21 02:43:44,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:44,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 02:43:44,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:44,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 02:43:44,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 02:43:44,593 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:45,358 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2022-07-21 02:43:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-21 02:43:45,359 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 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 192 [2022-07-21 02:43:45,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:45,359 INFO L225 Difference]: With dead ends: 204 [2022-07-21 02:43:45,359 INFO L226 Difference]: Without dead ends: 202 [2022-07-21 02:43:45,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 426 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3781, Invalid=6521, Unknown=0, NotChecked=0, Total=10302 [2022-07-21 02:43:45,361 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 155 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:45,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 36 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:43:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-21 02:43:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2022-07-21 02:43:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2022-07-21 02:43:45,403 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 192 [2022-07-21 02:43:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:45,403 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2022-07-21 02:43:45,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2022-07-21 02:43:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-21 02:43:45,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:45,404 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:45,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-07-21 02:43:45,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:45,608 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:45,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:45,608 INFO L85 PathProgramCache]: Analyzing trace with hash -257295411, now seen corresponding path program 93 times [2022-07-21 02:43:45,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:45,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857046516] [2022-07-21 02:43:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:45,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3198 proven. 1267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:47,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:47,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857046516] [2022-07-21 02:43:47,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857046516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:47,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879680811] [2022-07-21 02:43:47,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:43:47,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:47,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:47,740 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:47,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-07-21 02:43:47,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2022-07-21 02:43:47,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:47,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-21 02:43:47,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:50,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:50,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879680811] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:50,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:50,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 149 [2022-07-21 02:43:50,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889267285] [2022-07-21 02:43:50,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:50,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-07-21 02:43:50,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:50,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-07-21 02:43:50,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4954, Invalid=17098, Unknown=0, NotChecked=0, Total=22052 [2022-07-21 02:43:50,903 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:52,623 INFO L93 Difference]: Finished difference Result 345 states and 347 transitions. [2022-07-21 02:43:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-21 02:43:52,623 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 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 195 [2022-07-21 02:43:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:52,623 INFO L225 Difference]: With dead ends: 345 [2022-07-21 02:43:52,624 INFO L226 Difference]: Without dead ends: 197 [2022-07-21 02:43:52,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8704 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8632, Invalid=30374, Unknown=0, NotChecked=0, Total=39006 [2022-07-21 02:43:52,625 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 11 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:52,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 616 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:43:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-21 02:43:52,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-07-21 02:43:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-07-21 02:43:52,662 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 195 [2022-07-21 02:43:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:52,662 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-07-21 02:43:52,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-07-21 02:43:52,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-21 02:43:52,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:52,663 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:52,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-07-21 02:43:52,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:52,864 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:52,864 INFO L85 PathProgramCache]: Analyzing trace with hash -586834040, now seen corresponding path program 94 times [2022-07-21 02:43:52,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:52,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996298954] [2022-07-21 02:43:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:52,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1128 proven. 3385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:53,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996298954] [2022-07-21 02:43:53,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996298954] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376433363] [2022-07-21 02:43:53,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:43:53,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:53,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:53,668 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:53,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-07-21 02:43:53,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:43:53,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:53,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-21 02:43:53,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:43:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:53,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:43:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:54,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376433363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:43:54,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:43:54,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 54 [2022-07-21 02:43:54,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265622149] [2022-07-21 02:43:54,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:43:54,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 02:43:54,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:54,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 02:43:54,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 02:43:54,137 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:54,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:54,924 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2022-07-21 02:43:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-07-21 02:43:54,924 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 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 196 [2022-07-21 02:43:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:54,925 INFO L225 Difference]: With dead ends: 208 [2022-07-21 02:43:54,925 INFO L226 Difference]: Without dead ends: 206 [2022-07-21 02:43:54,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 435 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3933, Invalid=6779, Unknown=0, NotChecked=0, Total=10712 [2022-07-21 02:43:54,926 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 109 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:43:54,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 37 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:43:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-21 02:43:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2022-07-21 02:43:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2022-07-21 02:43:54,971 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 196 [2022-07-21 02:43:54,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:54,971 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2022-07-21 02:43:54,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:54,971 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2022-07-21 02:43:54,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-21 02:43:54,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:54,972 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:54,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-07-21 02:43:55,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-07-21 02:43:55,173 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:55,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1851170639, now seen corresponding path program 95 times [2022-07-21 02:43:55,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:55,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800700792] [2022-07-21 02:43:55,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:55,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3338 proven. 1318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:43:57,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:57,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800700792] [2022-07-21 02:43:57,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800700792] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:43:57,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839185316] [2022-07-21 02:43:57,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:43:57,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:43:57,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:57,386 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:43:57,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-07-21 02:43:57,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-07-21 02:43:57,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:43:57,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-21 02:43:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:00,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:00,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839185316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:00,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:00,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 152 [2022-07-21 02:44:00,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76944225] [2022-07-21 02:44:00,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:00,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-07-21 02:44:00,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:00,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-07-21 02:44:00,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=17797, Unknown=0, NotChecked=0, Total=22952 [2022-07-21 02:44:00,650 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:02,451 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2022-07-21 02:44:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-21 02:44:02,451 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 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 199 [2022-07-21 02:44:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:02,452 INFO L225 Difference]: With dead ends: 352 [2022-07-21 02:44:02,452 INFO L226 Difference]: Without dead ends: 201 [2022-07-21 02:44:02,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9057 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8983, Invalid=31619, Unknown=0, NotChecked=0, Total=40602 [2022-07-21 02:44:02,454 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:02,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 702 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 02:44:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-21 02:44:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-07-21 02:44:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.01) internal successors, (202), 200 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) [2022-07-21 02:44:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2022-07-21 02:44:02,492 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 199 [2022-07-21 02:44:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:02,493 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2022-07-21 02:44:02,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2022-07-21 02:44:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-07-21 02:44:02,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:02,493 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:02,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-07-21 02:44:02,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:02,694 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:02,694 INFO L85 PathProgramCache]: Analyzing trace with hash -607736084, now seen corresponding path program 96 times [2022-07-21 02:44:02,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:02,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431095615] [2022-07-21 02:44:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:02,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1176 proven. 3529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:03,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:03,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431095615] [2022-07-21 02:44:03,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431095615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:03,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683405887] [2022-07-21 02:44:03,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:44:03,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:03,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:03,525 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:44:03,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-07-21 02:44:03,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-07-21 02:44:03,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:03,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-21 02:44:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:03,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:04,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683405887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:04,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:04,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 55 [2022-07-21 02:44:04,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531854552] [2022-07-21 02:44:04,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:04,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-21 02:44:04,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:04,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-21 02:44:04,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 02:44:04,047 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:04,859 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2022-07-21 02:44:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-21 02:44:04,860 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 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 200 [2022-07-21 02:44:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:04,860 INFO L225 Difference]: With dead ends: 212 [2022-07-21 02:44:04,860 INFO L226 Difference]: Without dead ends: 210 [2022-07-21 02:44:04,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 444 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4088, Invalid=7042, Unknown=0, NotChecked=0, Total=11130 [2022-07-21 02:44:04,861 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 113 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:04,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 31 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:44:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-21 02:44:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-07-21 02:44:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2022-07-21 02:44:04,901 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 200 [2022-07-21 02:44:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:04,901 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2022-07-21 02:44:04,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2022-07-21 02:44:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-21 02:44:04,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:04,901 INFO L195 NwaCegarLoop]: trace histogram [50, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:04,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-07-21 02:44:05,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:05,103 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:05,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1773705523, now seen corresponding path program 97 times [2022-07-21 02:44:05,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:05,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816232529] [2022-07-21 02:44:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:05,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3481 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:07,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:07,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816232529] [2022-07-21 02:44:07,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816232529] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:07,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914763093] [2022-07-21 02:44:07,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:44:07,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:07,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:07,407 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:44:07,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-07-21 02:44:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:07,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 102 conjunts are in the unsatisfiable core [2022-07-21 02:44:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:10,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:10,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914763093] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:10,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:10,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 155 [2022-07-21 02:44:10,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106514161] [2022-07-21 02:44:10,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:10,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-07-21 02:44:10,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:10,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-07-21 02:44:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5360, Invalid=18510, Unknown=0, NotChecked=0, Total=23870 [2022-07-21 02:44:10,733 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:12,583 INFO L93 Difference]: Finished difference Result 359 states and 361 transitions. [2022-07-21 02:44:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-07-21 02:44:12,583 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 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 203 [2022-07-21 02:44:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:12,584 INFO L225 Difference]: With dead ends: 359 [2022-07-21 02:44:12,584 INFO L226 Difference]: Without dead ends: 205 [2022-07-21 02:44:12,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9417 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9341, Invalid=32889, Unknown=0, NotChecked=0, Total=42230 [2022-07-21 02:44:12,585 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:12,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 644 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 02:44:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-21 02:44:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-07-21 02:44:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-07-21 02:44:12,625 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 203 [2022-07-21 02:44:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:12,625 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-07-21 02:44:12,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-07-21 02:44:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-21 02:44:12,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:12,626 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:12,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-07-21 02:44:12,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-07-21 02:44:12,826 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:12,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:12,827 INFO L85 PathProgramCache]: Analyzing trace with hash -666034296, now seen corresponding path program 98 times [2022-07-21 02:44:12,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:12,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190749105] [2022-07-21 02:44:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:12,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1225 proven. 3676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:13,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:13,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190749105] [2022-07-21 02:44:13,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190749105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:13,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997034246] [2022-07-21 02:44:13,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:44:13,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:13,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:13,724 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:44:13,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-07-21 02:44:13,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:44:13,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:13,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 103 conjunts are in the unsatisfiable core [2022-07-21 02:44:13,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:14,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:14,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997034246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:14,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:14,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 56 [2022-07-21 02:44:14,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526356141] [2022-07-21 02:44:14,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:14,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-21 02:44:14,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:14,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-21 02:44:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 02:44:14,189 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:15,034 INFO L93 Difference]: Finished difference Result 216 states and 217 transitions. [2022-07-21 02:44:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-07-21 02:44:15,034 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 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 204 [2022-07-21 02:44:15,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:15,035 INFO L225 Difference]: With dead ends: 216 [2022-07-21 02:44:15,035 INFO L226 Difference]: Without dead ends: 214 [2022-07-21 02:44:15,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 453 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2898 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4246, Invalid=7310, Unknown=0, NotChecked=0, Total=11556 [2022-07-21 02:44:15,036 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 212 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:15,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 27 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:44:15,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-21 02:44:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2022-07-21 02:44:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2022-07-21 02:44:15,082 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 204 [2022-07-21 02:44:15,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:15,082 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2022-07-21 02:44:15,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:15,082 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2022-07-21 02:44:15,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-21 02:44:15,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:15,083 INFO L195 NwaCegarLoop]: trace histogram [51, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:15,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-07-21 02:44:15,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:15,284 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:15,284 INFO L85 PathProgramCache]: Analyzing trace with hash 926015665, now seen corresponding path program 99 times [2022-07-21 02:44:15,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:15,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270717834] [2022-07-21 02:44:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:15,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3627 proven. 1423 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:17,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:17,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270717834] [2022-07-21 02:44:17,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270717834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:17,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546988831] [2022-07-21 02:44:17,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:44:17,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:17,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:17,638 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:44:17,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-07-21 02:44:17,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2022-07-21 02:44:17,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:17,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-21 02:44:17,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:20,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:21,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546988831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:21,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:21,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 158 [2022-07-21 02:44:21,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680641658] [2022-07-21 02:44:21,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:21,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-07-21 02:44:21,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:21,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-07-21 02:44:21,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5569, Invalid=19237, Unknown=0, NotChecked=0, Total=24806 [2022-07-21 02:44:21,118 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 158 states, 158 states have (on average 2.310126582278481) internal successors, (365), 158 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:22,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:22,971 INFO L93 Difference]: Finished difference Result 366 states and 368 transitions. [2022-07-21 02:44:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-21 02:44:22,971 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.310126582278481) internal successors, (365), 158 states have internal predecessors, (365), 0 states have call successors, (0), 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 207 [2022-07-21 02:44:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:22,971 INFO L225 Difference]: With dead ends: 366 [2022-07-21 02:44:22,972 INFO L226 Difference]: Without dead ends: 209 [2022-07-21 02:44:22,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 360 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9784 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9706, Invalid=34184, Unknown=0, NotChecked=0, Total=43890 [2022-07-21 02:44:22,974 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 11 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:22,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 593 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:44:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-21 02:44:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-07-21 02:44:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2022-07-21 02:44:23,023 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 207 [2022-07-21 02:44:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:23,023 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2022-07-21 02:44:23,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.310126582278481) internal successors, (365), 158 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2022-07-21 02:44:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-21 02:44:23,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:23,024 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:23,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-07-21 02:44:23,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:23,227 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash 434553836, now seen corresponding path program 100 times [2022-07-21 02:44:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:23,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285000470] [2022-07-21 02:44:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:23,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1275 proven. 3826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:24,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:24,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285000470] [2022-07-21 02:44:24,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285000470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:24,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111290294] [2022-07-21 02:44:24,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:44:24,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:24,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:24,117 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:44:24,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-07-21 02:44:24,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:44:24,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:24,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-21 02:44:24,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:24,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:24,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111290294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:24,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:24,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 57 [2022-07-21 02:44:24,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348357595] [2022-07-21 02:44:24,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:24,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 02:44:24,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:24,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 02:44:24,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=1753, Unknown=0, NotChecked=0, Total=3192 [2022-07-21 02:44:24,596 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:25,470 INFO L93 Difference]: Finished difference Result 220 states and 221 transitions. [2022-07-21 02:44:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-07-21 02:44:25,470 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 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 208 [2022-07-21 02:44:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:25,470 INFO L225 Difference]: With dead ends: 220 [2022-07-21 02:44:25,470 INFO L226 Difference]: Without dead ends: 218 [2022-07-21 02:44:25,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 462 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4407, Invalid=7583, Unknown=0, NotChecked=0, Total=11990 [2022-07-21 02:44:25,472 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:25,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 33 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:44:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-21 02:44:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2022-07-21 02:44:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2022-07-21 02:44:25,519 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 208 [2022-07-21 02:44:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:25,519 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2022-07-21 02:44:25,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2022-07-21 02:44:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-21 02:44:25,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:25,520 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:25,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:25,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-07-21 02:44:25,723 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:25,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:25,724 INFO L85 PathProgramCache]: Analyzing trace with hash 766718413, now seen corresponding path program 101 times [2022-07-21 02:44:25,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:25,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853725575] [2022-07-21 02:44:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:25,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3776 proven. 1477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:28,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:28,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853725575] [2022-07-21 02:44:28,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853725575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:28,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818830382] [2022-07-21 02:44:28,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:44:28,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:28,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:28,192 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:44:28,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-07-21 02:44:28,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2022-07-21 02:44:28,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:28,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-21 02:44:28,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:31,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:31,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818830382] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:31,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:31,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 161 [2022-07-21 02:44:31,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16917902] [2022-07-21 02:44:31,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:31,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-07-21 02:44:31,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:31,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-07-21 02:44:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5782, Invalid=19978, Unknown=0, NotChecked=0, Total=25760 [2022-07-21 02:44:31,810 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 161 states, 161 states have (on average 2.31055900621118) internal successors, (372), 161 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:33,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:33,725 INFO L93 Difference]: Finished difference Result 373 states and 375 transitions. [2022-07-21 02:44:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-07-21 02:44:33,725 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.31055900621118) internal successors, (372), 161 states have internal predecessors, (372), 0 states have call successors, (0), 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 211 [2022-07-21 02:44:33,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:33,726 INFO L225 Difference]: With dead ends: 373 [2022-07-21 02:44:33,726 INFO L226 Difference]: Without dead ends: 213 [2022-07-21 02:44:33,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 367 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10158 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=10078, Invalid=35504, Unknown=0, NotChecked=0, Total=45582 [2022-07-21 02:44:33,728 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 11 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:33,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 588 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:44:33,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-21 02:44:33,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-07-21 02:44:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2022-07-21 02:44:33,778 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 211 [2022-07-21 02:44:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:33,779 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2022-07-21 02:44:33,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.31055900621118) internal successors, (372), 161 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2022-07-21 02:44:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-07-21 02:44:33,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:33,780 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:33,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-07-21 02:44:33,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-07-21 02:44:33,997 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:33,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:33,997 INFO L85 PathProgramCache]: Analyzing trace with hash 410910600, now seen corresponding path program 102 times [2022-07-21 02:44:33,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:33,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657931651] [2022-07-21 02:44:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:33,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1326 proven. 3979 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:34,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:34,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657931651] [2022-07-21 02:44:34,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657931651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:34,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039593656] [2022-07-21 02:44:34,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:44:34,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:34,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:34,916 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:44:34,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-07-21 02:44:35,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-07-21 02:44:35,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:35,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 107 conjunts are in the unsatisfiable core [2022-07-21 02:44:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:35,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:35,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039593656] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:35,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:35,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 58 [2022-07-21 02:44:35,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668242315] [2022-07-21 02:44:35,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:35,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 02:44:35,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:35,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 02:44:35,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1493, Invalid=1813, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 02:44:35,467 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)