./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-industry-pattern/mod3.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/loop-industry-pattern/mod3.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 4cb78a0927aaaf985fd071d82fe186e3e3838d2825c1d104414277cfde8a2d4d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:43:46,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:43:46,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:43:46,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:43:46,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:43:46,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:43:46,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:43:46,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:43:46,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:43:46,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:43:46,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:43:46,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:43:46,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:43:46,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:43:46,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:43:46,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:43:46,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:43:46,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:43:46,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:43:46,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:43:46,065 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:43:46,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:43:46,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:43:46,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:43:46,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:43:46,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:43:46,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:43:46,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:43:46,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:43:46,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:43:46,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:43:46,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:43:46,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:43:46,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:43:46,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:43:46,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:43:46,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:43:46,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:43:46,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:43:46,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:43:46,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:43:46,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:43:46,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:43:46,115 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:43:46,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:43:46,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:43:46,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:43:46,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:43:46,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:43:46,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:43:46,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:43:46,118 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:43:46,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:43:46,119 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:43:46,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:43:46,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:43:46,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:43:46,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:43:46,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:43:46,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:43:46,120 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:43:46,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:43:46,120 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:43:46,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:43:46,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:43:46,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:43:46,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:43:46,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:43:46,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:43:46,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:43:46,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:43:46,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:43:46,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:43:46,122 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:43:46,122 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:43:46,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:43:46,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb78a0927aaaf985fd071d82fe186e3e3838d2825c1d104414277cfde8a2d4d [2022-07-21 02:43:46,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:43:46,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:43:46,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:43:46,410 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:43:46,411 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:43:46,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-industry-pattern/mod3.c [2022-07-21 02:43:46,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a268245/6082434facc645cd898cbfed82fa30c5/FLAGfdf25ef06 [2022-07-21 02:43:46,780 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:43:46,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/mod3.c [2022-07-21 02:43:46,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a268245/6082434facc645cd898cbfed82fa30c5/FLAGfdf25ef06 [2022-07-21 02:43:47,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a268245/6082434facc645cd898cbfed82fa30c5 [2022-07-21 02:43:47,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:43:47,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:43:47,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:43:47,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:43:47,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:43:47,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e5bd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47, skipping insertion in model container [2022-07-21 02:43:47,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:43:47,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:43:47,322 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/mod3.c[394,407] [2022-07-21 02:43:47,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:43:47,341 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:43:47,351 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/mod3.c[394,407] [2022-07-21 02:43:47,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:43:47,392 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:43:47,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47 WrapperNode [2022-07-21 02:43:47,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:43:47,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:43:47,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:43:47,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:43:47,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,429 INFO L137 Inliner]: procedures = 13, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-07-21 02:43:47,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:43:47,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:43:47,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:43:47,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:43:47,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:43:47,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:43:47,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:43:47,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:43:47,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (1/1) ... [2022-07-21 02:43:47,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:43:47,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:43:47,529 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 02:43:47,544 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 02:43:47,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:43:47,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:43:47,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:43:47,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:43:47,627 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:43:47,628 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:43:54,333 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:43:54,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:43:54,338 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 02:43:54,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:43:54 BoogieIcfgContainer [2022-07-21 02:43:54,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:43:54,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:43:54,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:43:54,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:43:54,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:43:47" (1/3) ... [2022-07-21 02:43:54,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bdab24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:43:54, skipping insertion in model container [2022-07-21 02:43:54,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:47" (2/3) ... [2022-07-21 02:43:54,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bdab24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:43:54, skipping insertion in model container [2022-07-21 02:43:54,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:43:54" (3/3) ... [2022-07-21 02:43:54,360 INFO L111 eAbstractionObserver]: Analyzing ICFG mod3.c [2022-07-21 02:43:54,370 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:43:54,371 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:43:54,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:43:54,443 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@5b122112, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7f30e89f [2022-07-21 02:43:54,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:43:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 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 02:43:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 02:43:54,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:54,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 02:43:54,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash 890278313, now seen corresponding path program 1 times [2022-07-21 02:43:54,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:54,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102339390] [2022-07-21 02:43:54,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:54,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:54,581 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 02:43:54,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:54,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102339390] [2022-07-21 02:43:54,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102339390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:43:54,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:43:54,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:43:54,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511004867] [2022-07-21 02:43:54,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:43:54,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:43:54,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:54,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:43:54,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:43:54,620 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 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) 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 02:43:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:43:54,633 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2022-07-21 02:43:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:43:54,635 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 02:43:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:43:54,642 INFO L225 Difference]: With dead ends: 25 [2022-07-21 02:43:54,642 INFO L226 Difference]: Without dead ends: 11 [2022-07-21 02:43:54,645 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 02:43:54,649 INFO L413 NwaCegarLoop]: 20 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, 20 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 02:43:54,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:43:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-21 02:43:54,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-21 02:43:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-07-21 02:43:54,677 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2022-07-21 02:43:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:43:54,678 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-07-21 02:43:54,678 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 02:43:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-07-21 02:43:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 02:43:54,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:43:54,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:43:54,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:43:54,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:43:54,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:43:54,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1806865054, now seen corresponding path program 1 times [2022-07-21 02:43:54,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:43:54,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789788862] [2022-07-21 02:43:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:43:54,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:43:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:43:54,788 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 02:43:54,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:43:54,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789788862] [2022-07-21 02:43:54,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789788862] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:43:54,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:43:54,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:43:54,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781412482] [2022-07-21 02:43:54,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:43:54,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:43:54,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:43:54,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:43:54,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:43:54,793 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:43:56,808 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 02:43:58,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:44:01,164 WARN L534 Checker$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 02:44:03,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:44:05,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:44:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:05,673 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-07-21 02:44:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:44:05,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 02:44:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:05,675 INFO L225 Difference]: With dead ends: 20 [2022-07-21 02:44:05,675 INFO L226 Difference]: Without dead ends: 16 [2022-07-21 02:44:05,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:44:05,676 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 4 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:05,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 0 Invalid, 5 Unknown, 0 Unchecked, 10.9s Time] [2022-07-21 02:44:05,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-21 02:44:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2022-07-21 02:44:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-07-21 02:44:05,680 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2022-07-21 02:44:05,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:05,680 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-07-21 02:44:05,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-07-21 02:44:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 02:44:05,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:05,682 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:05,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:44:05,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:05,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:05,683 INFO L85 PathProgramCache]: Analyzing trace with hash 694220730, now seen corresponding path program 1 times [2022-07-21 02:44:05,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:05,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155357062] [2022-07-21 02:44:05,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:05,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:05,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155357062] [2022-07-21 02:44:05,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155357062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:44:05,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:44:05,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 02:44:05,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932615564] [2022-07-21 02:44:05,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:44:05,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 02:44:05,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:44:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 02:44:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 02:44:05,912 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:07,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:44:10,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:44:12,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:44:14,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 02:44:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:44:14,661 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2022-07-21 02:44:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 02:44:14,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) Word has length 10 [2022-07-21 02:44:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:44:14,663 INFO L225 Difference]: With dead ends: 31 [2022-07-21 02:44:14,663 INFO L226 Difference]: Without dead ends: 18 [2022-07-21 02:44:14,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 02:44:14,664 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-07-21 02:44:14,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 4 Unknown, 0 Unchecked, 8.7s Time] [2022-07-21 02:44:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-21 02:44:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-07-21 02:44:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:14,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-21 02:44:14,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2022-07-21 02:44:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:44:14,667 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-21 02:44:14,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:44:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-21 02:44:14,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 02:44:14,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:44:14,668 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:44:14,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 02:44:14,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:44:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:44:14,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2105263274, now seen corresponding path program 1 times [2022-07-21 02:44:14,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:44:14,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337258547] [2022-07-21 02:44:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:14,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:44:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:44:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:44:14,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:44:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337258547] [2022-07-21 02:44:14,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337258547] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:44:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717975107] [2022-07-21 02:44:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:44:14,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:44:14,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:44:14,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:44:14,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process