./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono6_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/Mono6_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 d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:45:12,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:45:12,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:45:12,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:45:12,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:45:12,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:45:12,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:45:12,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:45:12,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:45:12,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:45:12,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:45:12,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:45:12,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:45:12,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:45:12,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:45:12,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:45:12,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:45:12,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:45:12,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:45:12,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:45:12,695 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:45:12,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:45:12,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:45:12,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:45:12,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:45:12,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:45:12,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:45:12,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:45:12,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:45:12,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:45:12,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:45:12,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:45:12,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:45:12,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:45:12,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:45:12,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:45:12,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:45:12,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:45:12,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:45:12,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:45:12,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:45:12,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:45:12,726 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:45:12,762 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:45:12,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:45:12,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:45:12,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:45:12,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:45:12,764 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:45:12,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:45:12,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:45:12,765 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:45:12,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:45:12,767 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:45:12,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:45:12,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:45:12,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:45:12,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:45:12,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:45:12,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:45:12,768 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:45:12,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:45:12,768 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:45:12,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:45:12,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:45:12,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:45:12,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:45:12,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:45:12,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:45:12,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:45:12,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:45:12,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:45:12,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:45:12,771 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:45:12,771 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:45:12,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:45:12,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 [2022-07-21 02:45:13,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:45:13,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:45:13,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:45:13,119 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:45:13,120 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:45:13,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2022-07-21 02:45:13,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22d11ea15/c3326da776774185a764a3c92a2d73fc/FLAG2aabee837 [2022-07-21 02:45:13,675 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:45:13,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2022-07-21 02:45:13,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22d11ea15/c3326da776774185a764a3c92a2d73fc/FLAG2aabee837 [2022-07-21 02:45:14,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22d11ea15/c3326da776774185a764a3c92a2d73fc [2022-07-21 02:45:14,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:45:14,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:45:14,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:45:14,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:45:14,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:45:14,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bc738e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14, skipping insertion in model container [2022-07-21 02:45:14,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:45:14,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:45:14,216 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/Mono6_1.c[311,324] [2022-07-21 02:45:14,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:45:14,246 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:45:14,263 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/Mono6_1.c[311,324] [2022-07-21 02:45:14,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:45:14,279 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:45:14,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14 WrapperNode [2022-07-21 02:45:14,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:45:14,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:45:14,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:45:14,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:45:14,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,346 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-07-21 02:45:14,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:45:14,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:45:14,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:45:14,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:45:14,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:45:14,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:45:14,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:45:14,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:45:14,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14" (1/1) ... [2022-07-21 02:45:14,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:45:14,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:45:14,409 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 02:45:14,436 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 02:45:14,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:45:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:45:14,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:45:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:45:14,520 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:45:14,521 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:45:14,652 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:45:14,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:45:14,660 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 02:45:14,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:45:14 BoogieIcfgContainer [2022-07-21 02:45:14,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:45:14,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:45:14,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:45:14,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:45:14,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:45:14" (1/3) ... [2022-07-21 02:45:14,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5070a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:45:14, skipping insertion in model container [2022-07-21 02:45:14,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:45:14" (2/3) ... [2022-07-21 02:45:14,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5070a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:45:14, skipping insertion in model container [2022-07-21 02:45:14,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:45:14" (3/3) ... [2022-07-21 02:45:14,670 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2022-07-21 02:45:14,683 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:45:14,683 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:45:14,751 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:45:14,759 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@2a5e6dbc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1cf5fc11 [2022-07-21 02:45:14,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:45:14,773 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 02:45:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 02:45:14,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:45:14,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 02:45:14,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:45:14,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:45:14,789 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-07-21 02:45:14,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:45:14,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352015011] [2022-07-21 02:45:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:45:14,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:45:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:14,923 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 02:45:14,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:45:14,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352015011] [2022-07-21 02:45:14,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352015011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:45:14,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:45:14,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:45:14,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274506155] [2022-07-21 02:45:14,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:45:14,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:45:14,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:45:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:45:14,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:45:14,966 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 02:45:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:45:14,979 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-21 02:45:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:45:14,981 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 02:45:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:45:14,988 INFO L225 Difference]: With dead ends: 21 [2022-07-21 02:45:14,988 INFO L226 Difference]: Without dead ends: 9 [2022-07-21 02:45:14,991 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 02:45:14,995 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 02:45:14,997 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 02:45:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-21 02:45:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-21 02:45:15,024 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 02:45:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-21 02:45:15,027 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-07-21 02:45:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:45:15,027 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-21 02:45:15,028 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 02:45:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-21 02:45:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 02:45:15,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:45:15,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 02:45:15,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:45:15,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:45:15,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:45:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-07-21 02:45:15,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:45:15,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823306204] [2022-07-21 02:45:15,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:45:15,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:45:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:15,188 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 02:45:15,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:45:15,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823306204] [2022-07-21 02:45:15,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823306204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:45:15,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:45:15,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:45:15,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568297012] [2022-07-21 02:45:15,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:45:15,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:45:15,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:45:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:45:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:45:15,193 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 02:45:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:45:15,226 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-07-21 02:45:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:45:15,226 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 02:45:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:45:15,227 INFO L225 Difference]: With dead ends: 19 [2022-07-21 02:45:15,227 INFO L226 Difference]: Without dead ends: 12 [2022-07-21 02:45:15,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 02:45:15,229 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:45:15,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:45:15,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-21 02:45:15,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-07-21 02:45:15,233 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 02:45:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-07-21 02:45:15,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-07-21 02:45:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:45:15,234 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-07-21 02:45:15,235 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 02:45:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-07-21 02:45:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 02:45:15,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:45:15,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:45:15,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:45:15,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:45:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:45:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2022-07-21 02:45:15,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:45:15,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837013922] [2022-07-21 02:45:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:45:15,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:45:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:15,354 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 02:45:15,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:45:15,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837013922] [2022-07-21 02:45:15,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837013922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:45:15,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902174858] [2022-07-21 02:45:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:45:15,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:45:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:45:15,375 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 02:45:15,420 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 02:45:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 02:45:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:45:15,545 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 02:45:15,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:45:15,604 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 02:45:15,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902174858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:45:15,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:45:15,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-07-21 02:45:15,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169704146] [2022-07-21 02:45:15,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:45:15,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 02:45:15,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:45:15,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 02:45:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:45:15,608 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:45:15,837 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-07-21 02:45:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 02:45:15,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 02:45:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:45:15,838 INFO L225 Difference]: With dead ends: 33 [2022-07-21 02:45:15,838 INFO L226 Difference]: Without dead ends: 22 [2022-07-21 02:45:15,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:45:15,840 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:45:15,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 16 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:45:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-21 02:45:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-07-21 02:45:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-21 02:45:15,846 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 9 [2022-07-21 02:45:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:45:15,847 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-21 02:45:15,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-21 02:45:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 02:45:15,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:45:15,848 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-21 02:45:15,876 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 02:45:16,073 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 02:45:16,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:45:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:45:16,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2022-07-21 02:45:16,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:45:16,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408043874] [2022-07-21 02:45:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:45:16,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:45:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:45:16,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:45:16,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408043874] [2022-07-21 02:45:16,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408043874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:45:16,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377005069] [2022-07-21 02:45:16,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:45:16,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:45:16,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:45:16,255 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 02:45:16,270 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 02:45:16,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 02:45:16,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:45:16,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 02:45:16,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:45:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 02:45:16,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:45:16,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377005069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:45:16,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:45:16,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-07-21 02:45:16,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995972622] [2022-07-21 02:45:16,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:45:16,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 02:45:16,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:45:16,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 02:45:16,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-21 02:45:16,397 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:45:16,447 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-07-21 02:45:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 02:45:16,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 02:45:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:45:16,450 INFO L225 Difference]: With dead ends: 30 [2022-07-21 02:45:16,450 INFO L226 Difference]: Without dead ends: 26 [2022-07-21 02:45:16,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-21 02:45:16,452 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:45:16,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:45:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-21 02:45:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-21 02:45:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-21 02:45:16,459 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2022-07-21 02:45:16,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:45:16,459 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-21 02:45:16,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-21 02:45:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 02:45:16,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:45:16,460 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:45:16,486 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 02:45:16,685 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 02:45:16,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:45:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:45:16,686 INFO L85 PathProgramCache]: Analyzing trace with hash 491841168, now seen corresponding path program 1 times [2022-07-21 02:45:16,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:45:16,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147214219] [2022-07-21 02:45:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:45:16,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:45:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:45:16,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:45:16,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147214219] [2022-07-21 02:45:16,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147214219] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:45:16,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871028575] [2022-07-21 02:45:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:45:16,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:45:16,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:45:16,792 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 02:45:16,817 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 02:45:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 02:45:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:45:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:45:16,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:45:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:45:17,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871028575] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:45:17,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:45:17,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 9] total 14 [2022-07-21 02:45:17,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818513694] [2022-07-21 02:45:17,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:45:17,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 02:45:17,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:45:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 02:45:17,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-21 02:45:17,150 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:18,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:45:18,356 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-07-21 02:45:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 02:45:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 02:45:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:45:18,358 INFO L225 Difference]: With dead ends: 53 [2022-07-21 02:45:18,358 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 02:45:18,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2022-07-21 02:45:18,359 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:45:18,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 25 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:45:18,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 02:45:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-07-21 02:45:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-07-21 02:45:18,377 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 18 [2022-07-21 02:45:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:45:18,377 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-07-21 02:45:18,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-07-21 02:45:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 02:45:18,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:45:18,378 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:45:18,405 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 02:45:18,579 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 02:45:18,580 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:45:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:45:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash -191017413, now seen corresponding path program 2 times [2022-07-21 02:45:18,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:45:18,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383919587] [2022-07-21 02:45:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:45:18,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:45:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:45:18,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:45:18,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383919587] [2022-07-21 02:45:18,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383919587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:45:18,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360225147] [2022-07-21 02:45:18,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:45:18,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:45:18,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:45:18,704 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 02:45:18,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 02:45:18,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:45:18,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:45:18,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 02:45:18,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:45:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:45:18,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:45:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:45:19,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360225147] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:45:19,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:45:19,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 20 [2022-07-21 02:45:19,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474459700] [2022-07-21 02:45:19,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:45:19,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 02:45:19,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:45:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 02:45:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-07-21 02:45:19,067 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:45:21,783 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2022-07-21 02:45:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 02:45:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 02:45:21,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:45:21,784 INFO L225 Difference]: With dead ends: 109 [2022-07-21 02:45:21,785 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 02:45:21,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2022-07-21 02:45:21,786 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 02:45:21,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 31 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 02:45:21,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 02:45:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2022-07-21 02:45:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 78 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-07-21 02:45:21,806 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 21 [2022-07-21 02:45:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:45:21,806 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-07-21 02:45:21,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-07-21 02:45:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 02:45:21,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:45:21,808 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:45:21,829 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 02:45:22,019 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 02:45:22,020 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:45:22,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:45:22,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1942413364, now seen corresponding path program 3 times [2022-07-21 02:45:22,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:45:22,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692319305] [2022-07-21 02:45:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:45:22,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:45:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 79 proven. 40 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 02:45:22,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:45:22,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692319305] [2022-07-21 02:45:22,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692319305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:45:22,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305283137] [2022-07-21 02:45:22,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:45:22,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:45:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:45:22,168 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 02:45:22,173 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 02:45:22,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 02:45:22,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:45:22,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 02:45:22,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:45:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-21 02:45:22,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:45:22,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305283137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:45:22,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:45:22,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-07-21 02:45:22,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441185096] [2022-07-21 02:45:22,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:45:22,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 02:45:22,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:45:22,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 02:45:22,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-21 02:45:22,295 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 02:45:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:45:22,336 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2022-07-21 02:45:22,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 02:45:22,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) Word has length 36 [2022-07-21 02:45:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:45:22,338 INFO L225 Difference]: With dead ends: 103 [2022-07-21 02:45:22,338 INFO L226 Difference]: Without dead ends: 99 [2022-07-21 02:45:22,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-21 02:45:22,339 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:45:22,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:45:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-21 02:45:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2022-07-21 02:45:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-07-21 02:45:22,352 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 36 [2022-07-21 02:45:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:45:22,352 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-07-21 02:45:22,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 02:45:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-07-21 02:45:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 02:45:22,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:45:22,354 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:45:22,392 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 02:45:22,575 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 02:45:22,576 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:45:22,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:45:22,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1991122341, now seen corresponding path program 4 times [2022-07-21 02:45:22,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:45:22,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4110825] [2022-07-21 02:45:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:45:22,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:45:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:45:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:45:22,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:45:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4110825] [2022-07-21 02:45:22,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4110825] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:45:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217584772] [2022-07-21 02:45:22,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:45:22,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:45:22,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:45:22,780 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 02:45:22,808 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 02:45:22,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:45:22,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:45:22,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 02:45:22,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:45:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:45:23,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:45:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:45:23,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217584772] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:45:23,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:45:23,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 14] total 38 [2022-07-21 02:45:23,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416138428] [2022-07-21 02:45:23,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:45:23,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 02:45:23,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:45:23,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 02:45:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 02:45:23,616 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:45:25,852 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296))) (and (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 2) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 5) 4294967296))) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 9) 4294967296) .cse0)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296) .cse0)) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 3) 4294967296))) (not (= .cse0 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296))) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 6) 4294967296))) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296))))) is different from false [2022-07-21 02:46:00,347 WARN L233 SmtUtils]: Spent 8.66s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 02:46:02,683 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296))) (and (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 2) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 5) 4294967296))) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 9) 4294967296) .cse0)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296) .cse0)) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 3) 4294967296))) (not (= .cse0 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 6) 4294967296))) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296))))) is different from false [2022-07-21 02:46:49,055 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:46:51,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:46:52,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:46:53,881 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:46:55,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:46:57,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:46:59,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:01,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:02,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:04,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:08,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:10,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:11,750 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:30,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:37,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:39,667 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:41,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:43,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:47:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:47:52,593 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2022-07-21 02:47:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-21 02:47:52,594 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-21 02:47:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:47:52,595 INFO L225 Difference]: With dead ends: 180 [2022-07-21 02:47:52,595 INFO L226 Difference]: Without dead ends: 123 [2022-07-21 02:47:52,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 110.8s TimeCoverageRelationStatistics Valid=774, Invalid=3004, Unknown=12, NotChecked=242, Total=4032 [2022-07-21 02:47:52,598 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 43 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 38.8s IncrementalHoareTripleChecker+Time [2022-07-21 02:47:52,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 197 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 832 Invalid, 10 Unknown, 6 Unchecked, 38.8s Time] [2022-07-21 02:47:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-21 02:47:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 103. [2022-07-21 02:47:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 102 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:47:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2022-07-21 02:47:52,612 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 39 [2022-07-21 02:47:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:47:52,612 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2022-07-21 02:47:52,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:47:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2022-07-21 02:47:52,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 02:47:52,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:47:52,614 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 02:47:52,633 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 02:47:52,819 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 02:47:52,820 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:47:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:47:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash -83499594, now seen corresponding path program 5 times [2022-07-21 02:47:52,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:47:52,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675581660] [2022-07-21 02:47:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:47:52,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:47:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:47:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 93 proven. 187 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 02:47:53,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:47:53,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675581660] [2022-07-21 02:47:53,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675581660] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:47:53,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041097745] [2022-07-21 02:47:53,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:47:53,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:47:53,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:47:53,032 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 02:47:53,043 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 02:47:53,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-21 02:47:53,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:47:53,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 02:47:53,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:47:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-21 02:47:53,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:47:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-21 02:47:53,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041097745] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:47:53,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:47:53,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2022-07-21 02:47:53,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566831133] [2022-07-21 02:47:53,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:47:53,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 02:47:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:47:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 02:47:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:47:53,873 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 02:47:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:47:54,132 INFO L93 Difference]: Finished difference Result 143 states and 175 transitions. [2022-07-21 02:47:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 02:47:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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) Word has length 48 [2022-07-21 02:47:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:47:54,136 INFO L225 Difference]: With dead ends: 143 [2022-07-21 02:47:54,136 INFO L226 Difference]: Without dead ends: 78 [2022-07-21 02:47:54,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-07-21 02:47:54,139 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:47:54,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 14 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:47:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-21 02:47:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-07-21 02:47:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:47:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-07-21 02:47:54,169 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 48 [2022-07-21 02:47:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:47:54,170 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-07-21 02:47:54,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 02:47:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-07-21 02:47:54,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 02:47:54,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:47:54,177 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:47:54,183 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 02:47:54,382 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 02:47:54,382 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:47:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:47:54,383 INFO L85 PathProgramCache]: Analyzing trace with hash -724913509, now seen corresponding path program 6 times [2022-07-21 02:47:54,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:47:54,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707690056] [2022-07-21 02:47:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:47:54,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:47:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:47:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:47:54,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:47:54,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707690056] [2022-07-21 02:47:54,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707690056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:47:54,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545960607] [2022-07-21 02:47:54,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:47:54,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:47:54,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:47:54,916 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 02:47:54,917 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 02:47:54,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 02:47:54,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:47:54,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 02:47:54,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:47:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-07-21 02:47:55,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:47:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-07-21 02:47:55,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545960607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:47:55,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:47:55,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 32 [2022-07-21 02:47:55,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480093968] [2022-07-21 02:47:55,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:47:55,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 02:47:55,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:47:55,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 02:47:55,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2022-07-21 02:47:55,584 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:47:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:47:57,385 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2022-07-21 02:47:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 02:47:57,386 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-21 02:47:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:47:57,386 INFO L225 Difference]: With dead ends: 105 [2022-07-21 02:47:57,387 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 02:47:57,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=451, Invalid=3455, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 02:47:57,389 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 140 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 02:47:57,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 30 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 02:47:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 02:47:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-07-21 02:47:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:47:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-07-21 02:47:57,398 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 75 [2022-07-21 02:47:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:47:57,399 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-07-21 02:47:57,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:47:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-07-21 02:47:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 02:47:57,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:47:57,401 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 23, 4, 1, 1, 1, 1, 1, 1] [2022-07-21 02:47:57,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 02:47:57,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 02:47:57,625 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:47:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:47:57,626 INFO L85 PathProgramCache]: Analyzing trace with hash 220270617, now seen corresponding path program 7 times [2022-07-21 02:47:57,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:47:57,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742076835] [2022-07-21 02:47:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:47:57,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:47:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:47:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 260 proven. 805 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 02:47:58,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:47:58,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742076835] [2022-07-21 02:47:58,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742076835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:47:58,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46132999] [2022-07-21 02:47:58,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 02:47:58,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:47:58,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:47:58,096 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:47:58,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 02:47:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:47:58,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 02:47:58,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:47:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 128 proven. 950 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:47:58,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:48:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 128 proven. 950 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:48:00,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46132999] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:48:00,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:48:00,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 29] total 56 [2022-07-21 02:48:00,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059756295] [2022-07-21 02:48:00,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:48:00,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-21 02:48:00,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:48:00,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-21 02:48:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=2217, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 02:48:00,109 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 56 states, 56 states have (on average 2.982142857142857) internal successors, (167), 56 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)