./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono3_1.c --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/loops-crafted-1/Mono3_1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:44:08,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:44:08,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:44:08,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:44:08,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:44:08,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:44:08,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:44:08,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:44:08,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:44:08,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:44:08,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:44:08,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:44:08,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:44:08,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:44:08,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:44:08,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:44:08,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:44:08,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:44:08,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:44:08,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:44:08,332 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:44:08,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:44:08,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:44:08,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:44:08,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:44:08,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:44:08,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:44:08,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:44:08,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:44:08,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:44:08,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:44:08,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:44:08,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:44:08,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:44:08,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:44:08,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:44:08,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:44:08,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:44:08,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:44:08,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:44:08,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:44:08,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:44:08,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:44:08,398 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:44:08,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:44:08,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:44:08,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:44:08,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:44:08,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:44:08,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:44:08,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:44:08,400 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:44:08,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:44:08,401 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:44:08,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:44:08,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:44:08,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:44:08,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:44:08,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:44:08,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:44:08,402 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:44:08,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:44:08,403 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:44:08,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:44:08,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:44:08,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:44:08,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:44:08,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:44:08,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:44:08,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:44:08,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:44:08,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:44:08,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:44:08,404 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:44:08,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:44:08,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:44:08,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 [2022-07-21 02:44:08,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:44:08,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:44:08,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:44:08,696 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:44:08,696 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:44:08,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2022-07-21 02:44:08,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f307c94b/aabe42fa48c744e0ba4b928060c32f71/FLAG0ae3ced1b [2022-07-21 02:44:09,108 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:44:09,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2022-07-21 02:44:09,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f307c94b/aabe42fa48c744e0ba4b928060c32f71/FLAG0ae3ced1b [2022-07-21 02:44:09,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f307c94b/aabe42fa48c744e0ba4b928060c32f71 [2022-07-21 02:44:09,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:44:09,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:44:09,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:44:09,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:44:09,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:44:09,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10db9d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09, skipping insertion in model container [2022-07-21 02:44:09,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:44:09,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:44:09,237 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/loops-crafted-1/Mono3_1.c[311,324] [2022-07-21 02:44:09,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:44:09,252 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:44:09,260 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/loops-crafted-1/Mono3_1.c[311,324] [2022-07-21 02:44:09,261 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:44:09,290 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:44:09,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09 WrapperNode [2022-07-21 02:44:09,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:44:09,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:44:09,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:44:09,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:44:09,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,309 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,320 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-07-21 02:44:09,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:44:09,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:44:09,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:44:09,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:44:09,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:44:09,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:44:09,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:44:09,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:44:09,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09" (1/1) ... [2022-07-21 02:44:09,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:44:09,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:09,368 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 02:44:09,374 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 02:44:09,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:44:09,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:44:09,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:44:09,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:44:09,441 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:44:09,443 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:44:09,561 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:44:09,565 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:44:09,565 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 02:44:09,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:44:09 BoogieIcfgContainer [2022-07-21 02:44:09,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:44:09,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:44:09,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:44:09,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:44:09,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:44:09" (1/3) ... [2022-07-21 02:44:09,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c488b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:44:09, skipping insertion in model container [2022-07-21 02:44:09,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:44:09" (2/3) ... [2022-07-21 02:44:09,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c488b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:44:09, skipping insertion in model container [2022-07-21 02:44:09,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:44:09" (3/3) ... [2022-07-21 02:44:09,572 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2022-07-21 02:44:09,583 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:44:09,583 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:44:09,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:44:09,632 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@6d1e1d34, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1341bc3a [2022-07-21 02:44:09,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:44:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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 02:44:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 02:44:09,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:09,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 02:44:09,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:09,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:09,652 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-07-21 02:44:09,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:09,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017808620] [2022-07-21 02:44:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:09,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:09,753 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 02:44:09,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:09,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017808620] [2022-07-21 02:44:09,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017808620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:44:09,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:44:09,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:44:09,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179173350] [2022-07-21 02:44:09,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:44:09,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:44:09,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:09,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:44:09,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:44:09,786 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:09,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:09,795 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-21 02:44:09,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:44:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-07-21 02:44:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:09,802 INFO L225 Difference]: With dead ends: 21 [2022-07-21 02:44:09,802 INFO L226 Difference]: Without dead ends: 9 [2022-07-21 02:44:09,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:44:09,807 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:09,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:44:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-21 02:44:09,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-21 02:44:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-21 02:44:09,829 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-07-21 02:44:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:09,829 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-21 02:44:09,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:09,830 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-21 02:44:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 02:44:09,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:09,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 02:44:09,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:44:09,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:09,831 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-07-21 02:44:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:09,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40714291] [2022-07-21 02:44:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:09,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:09,885 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 02:44:09,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:09,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40714291] [2022-07-21 02:44:09,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40714291] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:44:09,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:44:09,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:44:09,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892450744] [2022-07-21 02:44:09,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:44:09,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:44:09,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:44:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:44:09,890 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:09,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:09,918 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-07-21 02:44:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:44:09,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-07-21 02:44:09,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:09,919 INFO L225 Difference]: With dead ends: 19 [2022-07-21 02:44:09,919 INFO L226 Difference]: Without dead ends: 12 [2022-07-21 02:44:09,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:44:09,921 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:09,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:44:09,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-21 02:44:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-07-21 02:44:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-07-21 02:44:09,924 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-07-21 02:44:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:09,924 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-07-21 02:44:09,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-07-21 02:44:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 02:44:09,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:09,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:09,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:44:09,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:09,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:09,932 INFO L85 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2022-07-21 02:44:09,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:09,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516179165] [2022-07-21 02:44:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:09,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:10,003 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 02:44:10,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:10,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516179165] [2022-07-21 02:44:10,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516179165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:10,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148160679] [2022-07-21 02:44:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:10,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:10,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:10,009 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 02:44:10,027 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 02:44:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:10,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 02:44:10,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:10,118 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 02:44:10,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:10,251 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 02:44:10,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148160679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:10,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:10,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 7] total 12 [2022-07-21 02:44:10,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845296652] [2022-07-21 02:44:10,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:10,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 02:44:10,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:10,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 02:44:10,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-21 02:44:10,255 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 02:44:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:10,476 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-07-21 02:44:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 02:44:10,477 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 02:44:10,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:10,478 INFO L225 Difference]: With dead ends: 31 [2022-07-21 02:44:10,478 INFO L226 Difference]: Without dead ends: 20 [2022-07-21 02:44:10,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:44:10,482 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:10,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 19 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:44:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-21 02:44:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-07-21 02:44:10,491 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 02:44:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-07-21 02:44:10,491 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2022-07-21 02:44:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:10,492 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-07-21 02:44:10,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 02:44:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-07-21 02:44:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 02:44:10,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:10,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:10,511 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 02:44:10,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:10,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:10,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash 329880921, now seen corresponding path program 1 times [2022-07-21 02:44:10,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:10,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836426977] [2022-07-21 02:44:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:10,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836426977] [2022-07-21 02:44:10,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836426977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:10,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233039352] [2022-07-21 02:44:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:10,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:10,771 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 02:44:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:10,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 02:44:10,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:10,801 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 02:44:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:44:10,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:44:10,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233039352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:10,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:10,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-07-21 02:44:10,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894282103] [2022-07-21 02:44:10,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:10,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 02:44:10,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:10,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 02:44:10,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-21 02:44:10,891 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 02:44:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:11,135 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-07-21 02:44:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 02:44:11,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) Word has length 15 [2022-07-21 02:44:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:11,136 INFO L225 Difference]: With dead ends: 56 [2022-07-21 02:44:11,136 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 02:44:11,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-07-21 02:44:11,138 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:11,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:44:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 02:44:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-07-21 02:44:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 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 02:44:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-21 02:44:11,145 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2022-07-21 02:44:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:11,145 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-21 02:44:11,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 02:44:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-21 02:44:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 02:44:11,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:11,146 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:11,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:11,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 02:44:11,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:11,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1412883461, now seen corresponding path program 2 times [2022-07-21 02:44:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:11,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643684972] [2022-07-21 02:44:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:11,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:44:11,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:11,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643684972] [2022-07-21 02:44:11,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643684972] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:11,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749236608] [2022-07-21 02:44:11,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:44:11,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:11,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:11,430 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 02:44:11,430 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 02:44:11,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:44:11,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:11,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 02:44:11,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 02:44:11,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 02:44:11,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749236608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:11,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:11,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-07-21 02:44:11,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936737636] [2022-07-21 02:44:11,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:11,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 02:44:11,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:11,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 02:44:11,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-21 02:44:11,665 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:12,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:12,019 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2022-07-21 02:44:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 02:44:12,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 02:44:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:12,020 INFO L225 Difference]: With dead ends: 111 [2022-07-21 02:44:12,020 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 02:44:12,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2022-07-21 02:44:12,021 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:12,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 60 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:44:12,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 02:44:12,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-07-21 02:44:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-07-21 02:44:12,042 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 21 [2022-07-21 02:44:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:12,042 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-07-21 02:44:12,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-07-21 02:44:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 02:44:12,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:12,043 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:12,069 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 02:44:12,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:12,260 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash -922085543, now seen corresponding path program 3 times [2022-07-21 02:44:12,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:12,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881573934] [2022-07-21 02:44:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 02:44:12,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:12,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881573934] [2022-07-21 02:44:12,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881573934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:12,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396420858] [2022-07-21 02:44:12,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:44:12,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:12,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:12,372 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 02:44:12,373 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 02:44:12,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-21 02:44:12,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:12,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 02:44:12,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 02:44:12,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 02:44:12,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396420858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:12,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:12,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-07-21 02:44:12,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813790883] [2022-07-21 02:44:12,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:12,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 02:44:12,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:12,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 02:44:12,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:44:12,729 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:14,540 INFO L93 Difference]: Finished difference Result 115 states and 156 transitions. [2022-07-21 02:44:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 02:44:14,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-21 02:44:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:14,542 INFO L225 Difference]: With dead ends: 115 [2022-07-21 02:44:14,542 INFO L226 Difference]: Without dead ends: 77 [2022-07-21 02:44:14,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2022-07-21 02:44:14,543 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:14,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 34 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 02:44:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-21 02:44:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 52. [2022-07-21 02:44:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 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 02:44:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-07-21 02:44:14,556 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 27 [2022-07-21 02:44:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:14,556 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-07-21 02:44:14,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-07-21 02:44:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 02:44:14,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:14,559 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 9, 6, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:14,573 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 02:44:14,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:14,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:14,763 INFO L85 PathProgramCache]: Analyzing trace with hash -522566631, now seen corresponding path program 4 times [2022-07-21 02:44:14,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:14,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992698105] [2022-07-21 02:44:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:14,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 173 proven. 57 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-21 02:44:14,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:14,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992698105] [2022-07-21 02:44:14,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992698105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:14,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749837103] [2022-07-21 02:44:14,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:44:14,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:14,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:14,879 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 02:44:14,881 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 02:44:14,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:44:14,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:14,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 02:44:14,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 02:44:15,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 02:44:15,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749837103] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:15,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:15,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-07-21 02:44:15,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100345435] [2022-07-21 02:44:15,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:15,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 02:44:15,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:15,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 02:44:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-07-21 02:44:15,360 INFO L87 Difference]: Start difference. First operand 52 states and 58 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 02:44:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:26,295 INFO L93 Difference]: Finished difference Result 1187 states and 1366 transitions. [2022-07-21 02:44:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-07-21 02:44:26,295 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 51 [2022-07-21 02:44:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:26,301 INFO L225 Difference]: With dead ends: 1187 [2022-07-21 02:44:26,301 INFO L226 Difference]: Without dead ends: 1152 [2022-07-21 02:44:26,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=3209, Invalid=15151, Unknown=0, NotChecked=0, Total=18360 [2022-07-21 02:44:26,307 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:26,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 101 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-21 02:44:26,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-07-21 02:44:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 814. [2022-07-21 02:44:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 1.1832718327183271) internal successors, (962), 813 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 962 transitions. [2022-07-21 02:44:26,385 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 962 transitions. Word has length 51 [2022-07-21 02:44:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:26,386 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 962 transitions. [2022-07-21 02:44:26,386 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 02:44:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 962 transitions. [2022-07-21 02:44:26,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 02:44:26,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:26,394 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 10, 7, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:26,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 02:44:26,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:26,608 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:26,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash 617649339, now seen corresponding path program 5 times [2022-07-21 02:44:26,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:26,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592585372] [2022-07-21 02:44:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 222 proven. 77 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-21 02:44:26,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:26,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592585372] [2022-07-21 02:44:26,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592585372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:26,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092601176] [2022-07-21 02:44:26,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:44:26,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:26,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:26,738 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 02:44:26,738 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 02:44:26,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-21 02:44:26,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 02:44:26,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 1 proven. 405 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 02:44:27,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:44:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 02:44:27,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092601176] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:44:27,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:44:27,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 35 [2022-07-21 02:44:27,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857371527] [2022-07-21 02:44:27,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:44:27,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 02:44:27,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:27,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 02:44:27,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 02:44:27,568 INFO L87 Difference]: Start difference. First operand 814 states and 962 transitions. Second operand has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 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 02:44:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:54,471 INFO L93 Difference]: Finished difference Result 3471 states and 4041 transitions. [2022-07-21 02:44:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-07-21 02:44:54,471 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 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) Word has length 57 [2022-07-21 02:44:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:54,479 INFO L225 Difference]: With dead ends: 3471 [2022-07-21 02:44:54,479 INFO L226 Difference]: Without dead ends: 2831 [2022-07-21 02:44:54,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14307 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=6498, Invalid=31332, Unknown=0, NotChecked=0, Total=37830 [2022-07-21 02:44:54,491 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:54,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 98 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-21 02:44:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-07-21 02:44:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 939. [2022-07-21 02:44:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 1.183368869936034) internal successors, (1110), 938 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1110 transitions. [2022-07-21 02:44:54,585 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1110 transitions. Word has length 57 [2022-07-21 02:44:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:54,587 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 1110 transitions. [2022-07-21 02:44:54,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 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 02:44:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1110 transitions. [2022-07-21 02:44:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 02:44:54,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:54,589 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:54,596 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 02:44:54,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:54,797 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:54,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1480398352, now seen corresponding path program 6 times [2022-07-21 02:44:54,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:54,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335897886] [2022-07-21 02:44:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:54,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 126 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-21 02:44:54,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:54,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335897886] [2022-07-21 02:44:54,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335897886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:54,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368235742] [2022-07-21 02:44:54,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:44:54,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:54,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:54,983 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 02:44:55,016 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 02:44:55,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-21 02:44:55,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:44:55,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 02:44:55,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:44:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 221 proven. 227 refuted. 3 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 02:44:59,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:45:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 126 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-21 02:45:01,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368235742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:45:01,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:45:01,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 14] total 44 [2022-07-21 02:45:01,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099157222] [2022-07-21 02:45:01,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:45:01,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 02:45:01,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:45:01,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 02:45:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1335, Unknown=1, NotChecked=0, Total=1892 [2022-07-21 02:45:01,588 INFO L87 Difference]: Start difference. First operand 939 states and 1110 transitions. Second operand has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 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 02:45:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:45:38,653 INFO L93 Difference]: Finished difference Result 1333 states and 1604 transitions. [2022-07-21 02:45:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 02:45:38,653 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 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) Word has length 60 [2022-07-21 02:45:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:45:38,655 INFO L225 Difference]: With dead ends: 1333 [2022-07-21 02:45:38,656 INFO L226 Difference]: Without dead ends: 431 [2022-07-21 02:45:38,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=1119, Invalid=2072, Unknown=1, NotChecked=0, Total=3192 [2022-07-21 02:45:38,663 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 276 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 02:45:38,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 42 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-21 02:45:38,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-07-21 02:45:38,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 103. [2022-07-21 02:45:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 102 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2022-07-21 02:45:38,678 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 60 [2022-07-21 02:45:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:45:38,679 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2022-07-21 02:45:38,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 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 02:45:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2022-07-21 02:45:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-21 02:45:38,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:45:38,680 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 21, 11, 1, 1, 1, 1, 1, 1] [2022-07-21 02:45:38,690 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 02:45:38,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:45:38,890 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:45:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:45:38,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2038282736, now seen corresponding path program 7 times [2022-07-21 02:45:38,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:45:38,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494716458] [2022-07-21 02:45:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:45:38,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:45:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 723 proven. 187 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-07-21 02:45:39,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:45:39,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494716458] [2022-07-21 02:45:39,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494716458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:45:39,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608644209] [2022-07-21 02:45:39,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:45:39,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:45:39,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:45:39,108 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 02:45:39,109 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 02:45:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:39,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-21 02:45:39,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:45:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 02:45:39,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:45:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 02:45:40,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608644209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:45:40,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:45:40,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 25] total 59 [2022-07-21 02:45:40,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095545611] [2022-07-21 02:45:40,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:45:40,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-21 02:45:40,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:45:40,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-21 02:45:40,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=2824, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 02:45:40,682 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 59 states, 59 states have (on average 3.406779661016949) internal successors, (201), 59 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 02:46:29,381 WARN L233 SmtUtils]: Spent 21.31s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 02:47:07,753 WARN L233 SmtUtils]: Spent 18.93s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 02:47:12,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:49,512 WARN L233 SmtUtils]: Spent 16.06s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 02:47:51,707 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:54,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:48:35,077 WARN L233 SmtUtils]: Spent 19.60s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)