./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono5_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/Mono5_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 0d27ce9425b362883f32c5ccf3973d31d4f8100e5e6b8fcc1a4527c07eb2b71c --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:23:52,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:23:52,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:23:52,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:23:52,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:23:52,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:23:52,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:23:52,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:23:52,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:23:52,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:23:52,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:23:52,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:23:52,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:23:52,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:23:52,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:23:52,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:23:52,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:23:52,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:23:52,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:23:52,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:23:52,164 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:23:52,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:23:52,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:23:52,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:23:52,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:23:52,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:23:52,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:23:52,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:23:52,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:23:52,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:23:52,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:23:52,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:23:52,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:23:52,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:23:52,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:23:52,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:23:52,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:23:52,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:23:52,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:23:52,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:23:52,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:23:52,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:23:52,182 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:23:52,217 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:23:52,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:23:52,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:23:52,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:23:52,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:23:52,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:23:52,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:23:52,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:23:52,220 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:23:52,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:23:52,221 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:23:52,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:23:52,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:23:52,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:23:52,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:23:52,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:23:52,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:23:52,222 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:23:52,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:23:52,222 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:23:52,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:23:52,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:23:52,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:23:52,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:23:52,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:23:52,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:23:52,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:23:52,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:23:52,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:23:52,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:23:52,224 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:23:52,224 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:23:52,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:23:52,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d27ce9425b362883f32c5ccf3973d31d4f8100e5e6b8fcc1a4527c07eb2b71c [2022-07-22 15:23:52,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:23:52,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:23:52,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:23:52,485 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:23:52,485 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:23:52,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono5_1.c [2022-07-22 15:23:52,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040bcd801/163052242686452e9d3f4c2ada469b23/FLAG1387b0454 [2022-07-22 15:23:52,883 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:23:52,884 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono5_1.c [2022-07-22 15:23:52,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040bcd801/163052242686452e9d3f4c2ada469b23/FLAG1387b0454 [2022-07-22 15:23:52,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040bcd801/163052242686452e9d3f4c2ada469b23 [2022-07-22 15:23:52,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:23:52,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:23:52,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:23:52,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:23:52,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:23:52,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:23:52" (1/1) ... [2022-07-22 15:23:52,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1400e4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:52, skipping insertion in model container [2022-07-22 15:23:52,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:23:52" (1/1) ... [2022-07-22 15:23:52,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:23:52,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:23:53,060 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/Mono5_1.c[311,324] [2022-07-22 15:23:53,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:23:53,086 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:23:53,097 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/Mono5_1.c[311,324] [2022-07-22 15:23:53,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:23:53,108 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:23:53,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53 WrapperNode [2022-07-22 15:23:53,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:23:53,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:23:53,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:23:53,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:23:53,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53" (1/1) ... [2022-07-22 15:23:53,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53" (1/1) ... [2022-07-22 15:23:53,137 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2022-07-22 15:23:53,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:23:53,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:23:53,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:23:53,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:23:53,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53" (1/1) ... [2022-07-22 15:23:53,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53" (1/1) ... [2022-07-22 15:23:53,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53" (1/1) ... [2022-07-22 15:23:53,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53" (1/1) ... [2022-07-22 15:23:53,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53" (1/1) ... [2022-07-22 15:23:53,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53" (1/1) ... [2022-07-22 15:23:53,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53" (1/1) ... [2022-07-22 15:23:53,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:23:53,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:23:53,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:23:53,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:23:53,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53" (1/1) ... [2022-07-22 15:23:53,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:23:53,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:23:53,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 15:23:53,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 15:23:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:23:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:23:53,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:23:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:23:53,255 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:23:53,256 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:23:53,327 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:23:53,332 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:23:53,332 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 15:23:53,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:23:53 BoogieIcfgContainer [2022-07-22 15:23:53,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:23:53,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:23:53,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:23:53,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:23:53,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:23:52" (1/3) ... [2022-07-22 15:23:53,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79dcb22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:23:53, skipping insertion in model container [2022-07-22 15:23:53,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:53" (2/3) ... [2022-07-22 15:23:53,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79dcb22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:23:53, skipping insertion in model container [2022-07-22 15:23:53,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:23:53" (3/3) ... [2022-07-22 15:23:53,341 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono5_1.c [2022-07-22 15:23:53,352 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:23:53,352 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:23:53,389 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:23:53,395 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@588b60f7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@46e0f10a [2022-07-22 15:23:53,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:23:53,398 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) [2022-07-22 15:23:53,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 15:23:53,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:53,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 15:23:53,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:53,408 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-07-22 15:23:53,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:53,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905782428] [2022-07-22 15:23:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:53,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:23:53,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:53,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905782428] [2022-07-22 15:23:53,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905782428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:23:53,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:23:53,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:23:53,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909359268] [2022-07-22 15:23:53,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:23:53,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:23:53,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:23:53,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:23:53,554 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) [2022-07-22 15:23:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:23:53,565 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-22 15:23:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:23:53,567 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 [2022-07-22 15:23:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:23:53,573 INFO L225 Difference]: With dead ends: 21 [2022-07-22 15:23:53,573 INFO L226 Difference]: Without dead ends: 9 [2022-07-22 15:23:53,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:23:53,578 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 [2022-07-22 15:23:53,578 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] [2022-07-22 15:23:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-22 15:23:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-22 15:23:53,598 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) [2022-07-22 15:23:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-22 15:23:53,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-07-22 15:23:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:23:53,600 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-22 15:23:53,600 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) [2022-07-22 15:23:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-22 15:23:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 15:23:53,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:53,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 15:23:53,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:23:53,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:53,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:53,604 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-07-22 15:23:53,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:53,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280992785] [2022-07-22 15:23:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:53,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:23:53,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:53,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280992785] [2022-07-22 15:23:53,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280992785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:23:53,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:23:53,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 15:23:53,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378648194] [2022-07-22 15:23:53,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:23:53,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 15:23:53,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:53,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 15:23:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 15:23:53,746 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2022-07-22 15:23:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:23:53,799 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-07-22 15:23:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 15:23:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2022-07-22 15:23:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:23:53,816 INFO L225 Difference]: With dead ends: 16 [2022-07-22 15:23:53,816 INFO L226 Difference]: Without dead ends: 12 [2022-07-22 15:23:53,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:23:53,818 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:23:53,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 22 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:23:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-22 15:23:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-22 15:23:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2022-07-22 15:23:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-22 15:23:53,822 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-07-22 15:23:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:23:53,822 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-22 15:23:53,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2022-07-22 15:23:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-22 15:23:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 15:23:53,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:53,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:23:53,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 15:23:53,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:53,824 INFO L85 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2022-07-22 15:23:53,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:53,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169558954] [2022-07-22 15:23:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:53,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:23:53,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:53,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169558954] [2022-07-22 15:23:53,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169558954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:23:53,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:23:53,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:23:53,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436216013] [2022-07-22 15:23:53,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:23:53,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 15:23:53,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:53,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 15:23:53,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:23:53,917 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-07-22 15:23:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:23:53,928 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-07-22 15:23:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 15:23:53,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 9 [2022-07-22 15:23:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:23:53,929 INFO L225 Difference]: With dead ends: 22 [2022-07-22 15:23:53,930 INFO L226 Difference]: Without dead ends: 15 [2022-07-22 15:23:53,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:23:53,931 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:23:53,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:23:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-22 15:23:53,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-07-22 15:23:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2022-07-22 15:23:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-22 15:23:53,935 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2022-07-22 15:23:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:23:53,936 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-22 15:23:53,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-07-22 15:23:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-22 15:23:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 15:23:53,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:53,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:23:53,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 15:23:53,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:53,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2007312204, now seen corresponding path program 1 times [2022-07-22 15:23:53,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:53,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881742295] [2022-07-22 15:23:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:53,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:23:54,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:54,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881742295] [2022-07-22 15:23:54,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881742295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:23:54,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415909610] [2022-07-22 15:23:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:54,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:54,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:23:54,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:23:54,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:23:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:54,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:23:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:23:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:23:54,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:23:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:23:54,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415909610] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:23:54,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:23:54,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-07-22 15:23:54,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060674029] [2022-07-22 15:23:54,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:23:54,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 15:23:54,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:54,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 15:23:54,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:23:54,224 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:54,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:23:54,351 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-07-22 15:23:54,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 15:23:54,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 15:23:54,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:23:54,353 INFO L225 Difference]: With dead ends: 40 [2022-07-22 15:23:54,353 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 15:23:54,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-22 15:23:54,365 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:23:54,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:23:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 15:23:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-07-22 15:23:54,369 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) [2022-07-22 15:23:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-22 15:23:54,388 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 12 [2022-07-22 15:23:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:23:54,388 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-22 15:23:54,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-22 15:23:54,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 15:23:54,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:54,389 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 15:23:54,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 15:23:54,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:54,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:54,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1502357326, now seen corresponding path program 2 times [2022-07-22 15:23:54,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:54,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534465397] [2022-07-22 15:23:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:54,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:23:54,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534465397] [2022-07-22 15:23:54,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534465397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:23:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081667755] [2022-07-22 15:23:54,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:23:54,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:54,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:23:54,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:23:54,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:23:54,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:23:54,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:23:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 15:23:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:23:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 15:23:54,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:23:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 15:23:54,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081667755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:23:54,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:23:54,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 16 [2022-07-22 15:23:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100804451] [2022-07-22 15:23:54,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:23:54,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 15:23:54,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 15:23:54,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-07-22 15:23:54,951 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:55,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:23:55,539 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2022-07-22 15:23:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 15:23:55,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-22 15:23:55,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:23:55,541 INFO L225 Difference]: With dead ends: 76 [2022-07-22 15:23:55,541 INFO L226 Difference]: Without dead ends: 48 [2022-07-22 15:23:55,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2022-07-22 15:23:55,542 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:23:55,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 136 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:23:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-22 15:23:55,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-22 15:23:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 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) [2022-07-22 15:23:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-07-22 15:23:55,549 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 24 [2022-07-22 15:23:55,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:23:55,550 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-07-22 15:23:55,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:55,550 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-07-22 15:23:55,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 15:23:55,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:55,551 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 10, 3, 1, 1, 1, 1, 1, 1] [2022-07-22 15:23:55,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 15:23:55,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:55,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:55,768 INFO L85 PathProgramCache]: Analyzing trace with hash 314984633, now seen corresponding path program 3 times [2022-07-22 15:23:55,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:55,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235970060] [2022-07-22 15:23:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:55,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-22 15:23:55,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:55,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235970060] [2022-07-22 15:23:55,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235970060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:23:55,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589560008] [2022-07-22 15:23:55,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:23:55,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:55,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:23:55,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:23:55,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:23:56,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-22 15:23:56,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:23:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 15:23:56,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:23:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-22 15:23:56,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:23:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-22 15:23:56,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589560008] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:23:56,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:23:56,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2022-07-22 15:23:56,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672641620] [2022-07-22 15:23:56,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:23:56,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 15:23:56,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:56,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 15:23:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-07-22 15:23:56,228 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:23:56,428 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-07-22 15:23:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 15:23:56,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-22 15:23:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:23:56,431 INFO L225 Difference]: With dead ends: 106 [2022-07-22 15:23:56,431 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 15:23:56,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2022-07-22 15:23:56,432 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:23:56,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 23 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:23:56,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 15:23:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2022-07-22 15:23:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-07-22 15:23:56,444 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 45 [2022-07-22 15:23:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:23:56,444 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-07-22 15:23:56,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-07-22 15:23:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 15:23:56,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:56,446 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 10, 8, 1, 1, 1, 1, 1, 1] [2022-07-22 15:23:56,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 15:23:56,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:56,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:56,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:56,652 INFO L85 PathProgramCache]: Analyzing trace with hash -487009614, now seen corresponding path program 4 times [2022-07-22 15:23:56,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:56,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393886329] [2022-07-22 15:23:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:56,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-22 15:23:56,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:56,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393886329] [2022-07-22 15:23:56,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393886329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:23:56,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686811453] [2022-07-22 15:23:56,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:23:56,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:56,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:23:56,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:23:56,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 15:23:56,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:23:56,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:23:56,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 15:23:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:23:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 15:23:57,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:23:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 15:23:57,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686811453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:23:57,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:23:57,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 34 [2022-07-22 15:23:57,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545243552] [2022-07-22 15:23:57,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:23:57,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 15:23:57,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 15:23:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 15:23:57,564 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:24:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:24:11,055 INFO L93 Difference]: Finished difference Result 160 states and 206 transitions. [2022-07-22 15:24:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 15:24:11,055 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-22 15:24:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:24:11,056 INFO L225 Difference]: With dead ends: 160 [2022-07-22 15:24:11,056 INFO L226 Difference]: Without dead ends: 102 [2022-07-22 15:24:11,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=920, Invalid=3240, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 15:24:11,059 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 401 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:24:11,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 463 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 15:24:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-22 15:24:11,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-07-22 15:24:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.24) internal successors, (124), 100 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:24:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2022-07-22 15:24:11,071 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 60 [2022-07-22 15:24:11,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:24:11,071 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2022-07-22 15:24:11,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:24:11,071 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2022-07-22 15:24:11,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 15:24:11,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:24:11,073 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 22, 9, 1, 1, 1, 1, 1, 1] [2022-07-22 15:24:11,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 15:24:11,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:24:11,300 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:24:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:24:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash 157606297, now seen corresponding path program 5 times [2022-07-22 15:24:11,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:24:11,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718631439] [2022-07-22 15:24:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:24:11,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:24:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:24:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 628 proven. 126 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-07-22 15:24:11,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:24:11,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718631439] [2022-07-22 15:24:11,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718631439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:24:11,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145850568] [2022-07-22 15:24:11,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:24:11,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:24:11,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:24:11,486 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:24:11,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 15:24:16,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-07-22 15:24:16,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:24:16,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-22 15:24:16,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:24:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1300 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-22 15:24:17,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:24:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1300 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-22 15:24:18,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145850568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:24:18,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:24:18,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 26, 26] total 59 [2022-07-22 15:24:18,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972195055] [2022-07-22 15:24:18,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:24:18,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-22 15:24:18,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:24:18,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-22 15:24:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=2769, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 15:24:18,226 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 59 states, 59 states have (on average 3.0677966101694913) internal successors, (181), 59 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:24:21,413 WARN L833 $PredicateComparison]: unable to prove that (and (not (= 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967278) 4294967296))) (not (= (mod (+ 4294967283 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967274 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0)) (not (= (mod (+ 4294967275 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0)) (not (= (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967279 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967289) 4294967296) 0)) (not (= (mod (+ 4294967288 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967282 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967284) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967286) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967285) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967281) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967291 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967287) 4294967296) 0)) (not (= (mod (+ 4294967290 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967276 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) is different from false [2022-07-22 15:24:23,421 WARN L833 $PredicateComparison]: unable to prove that (and (not (= 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967278) 4294967296))) (not (= (mod (+ 4294967283 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967274 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967275 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0)) (not (= (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967279 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967289) 4294967296) 0)) (not (= (mod (+ 4294967288 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967282 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967284) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967286) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967285) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967281) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967291 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967287) 4294967296) 0)) (not (= (mod (+ 4294967290 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) (not (= (mod (+ 4294967276 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) is different from false [2022-07-22 15:25:28,428 WARN L233 SmtUtils]: Spent 39.82s on a formula simplification that was a NOOP. DAG size: 112 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:26:24,836 WARN L233 SmtUtils]: Spent 27.93s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:27:17,090 WARN L233 SmtUtils]: Spent 27.26s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:28:08,204 WARN L233 SmtUtils]: Spent 23.32s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)