./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/phases_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/phases_1-2.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 4f868671c12bae02e06798527bc7c1ed7b8332d3fee83b3ff24f9cd503da0a60 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:35:44,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:35:44,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:35:44,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:35:44,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:35:44,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:35:44,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:35:44,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:35:44,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:35:44,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:35:44,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:35:44,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:35:44,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:35:44,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:35:44,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:35:44,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:35:44,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:35:44,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:35:44,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:35:44,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:35:44,198 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:35:44,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:35:44,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:35:44,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:35:44,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:35:44,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:35:44,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:35:44,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:35:44,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:35:44,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:35:44,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:35:44,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:35:44,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:35:44,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:35:44,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:35:44,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:35:44,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:35:44,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:35:44,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:35:44,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:35:44,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:35:44,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:35:44,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:35:44,248 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:35:44,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:35:44,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:35:44,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:35:44,249 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:35:44,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:35:44,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:35:44,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:35:44,250 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:35:44,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:35:44,251 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:35:44,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:35:44,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:35:44,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:35:44,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:35:44,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:35:44,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:35:44,252 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:35:44,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:35:44,253 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:35:44,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:35:44,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:35:44,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:35:44,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:35:44,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:35:44,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:35:44,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:35:44,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:35:44,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:35:44,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:35:44,255 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:35:44,255 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:35:44,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:35:44,255 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f868671c12bae02e06798527bc7c1ed7b8332d3fee83b3ff24f9cd503da0a60 [2022-07-21 02:35:44,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:35:44,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:35:44,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:35:44,523 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:35:44,523 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:35:44,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/phases_1-2.c [2022-07-21 02:35:44,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be13647f9/10cbad714d4a49d391b007d0e5d1f708/FLAGce4d49166 [2022-07-21 02:35:44,948 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:35:44,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c [2022-07-21 02:35:44,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be13647f9/10cbad714d4a49d391b007d0e5d1f708/FLAGce4d49166 [2022-07-21 02:35:44,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be13647f9/10cbad714d4a49d391b007d0e5d1f708 [2022-07-21 02:35:44,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:35:44,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:35:44,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:35:44,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:35:44,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:35:44,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:35:44" (1/1) ... [2022-07-21 02:35:44,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a16ad7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:44, skipping insertion in model container [2022-07-21 02:35:44,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:35:44" (1/1) ... [2022-07-21 02:35:44,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:35:44,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:35:45,107 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c[322,335] [2022-07-21 02:35:45,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:35:45,124 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:35:45,150 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c[322,335] [2022-07-21 02:35:45,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:35:45,175 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:35:45,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45 WrapperNode [2022-07-21 02:35:45,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:35:45,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:35:45,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:35:45,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:35:45,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45" (1/1) ... [2022-07-21 02:35:45,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45" (1/1) ... [2022-07-21 02:35:45,200 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2022-07-21 02:35:45,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:35:45,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:35:45,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:35:45,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:35:45,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45" (1/1) ... [2022-07-21 02:35:45,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45" (1/1) ... [2022-07-21 02:35:45,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45" (1/1) ... [2022-07-21 02:35:45,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45" (1/1) ... [2022-07-21 02:35:45,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45" (1/1) ... [2022-07-21 02:35:45,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45" (1/1) ... [2022-07-21 02:35:45,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45" (1/1) ... [2022-07-21 02:35:45,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:35:45,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:35:45,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:35:45,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:35:45,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45" (1/1) ... [2022-07-21 02:35:45,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:35:45,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:35:45,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 02:35:45,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 02:35:45,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:35:45,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:35:45,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:35:45,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:35:45,330 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:35:45,331 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:35:45,455 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:35:45,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:35:45,459 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 02:35:45,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:35:45 BoogieIcfgContainer [2022-07-21 02:35:45,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:35:45,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:35:45,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:35:45,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:35:45,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:35:44" (1/3) ... [2022-07-21 02:35:45,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@991be34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:35:45, skipping insertion in model container [2022-07-21 02:35:45,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:35:45" (2/3) ... [2022-07-21 02:35:45,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@991be34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:35:45, skipping insertion in model container [2022-07-21 02:35:45,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:35:45" (3/3) ... [2022-07-21 02:35:45,473 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2022-07-21 02:35:45,501 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:35:45,501 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:35:45,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:35:45,571 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@75d200fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@72cead41 [2022-07-21 02:35:45,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:35:45,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 02:35:45,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:45,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 02:35:45,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:45,599 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2022-07-21 02:35:45,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:35:45,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891094942] [2022-07-21 02:35:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:35:45,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:35:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:35:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:35:45,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:35:45,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891094942] [2022-07-21 02:35:45,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891094942] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:35:45,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:35:45,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:35:45,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70467104] [2022-07-21 02:35:45,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:35:45,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:35:45,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:35:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:35:45,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:35:45,746 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:45,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:45,756 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-07-21 02:35:45,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:35:45,758 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 02:35:45,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:45,763 INFO L225 Difference]: With dead ends: 20 [2022-07-21 02:35:45,763 INFO L226 Difference]: Without dead ends: 8 [2022-07-21 02:35:45,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:35:45,770 INFO L413 NwaCegarLoop]: 13 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, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:45,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:35:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-07-21 02:35:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-07-21 02:35:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-07-21 02:35:45,794 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-07-21 02:35:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:45,794 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-07-21 02:35:45,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-07-21 02:35:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 02:35:45,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:45,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 02:35:45,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:35:45,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:45,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:45,798 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2022-07-21 02:35:45,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:35:45,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347083907] [2022-07-21 02:35:45,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:35:45,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:35:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:35:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:35:45,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:35:45,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347083907] [2022-07-21 02:35:45,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347083907] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:35:45,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:35:45,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:35:45,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940665104] [2022-07-21 02:35:45,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:35:45,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:35:45,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:35:45,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:35:45,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:35:45,911 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:45,924 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2022-07-21 02:35:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:35:45,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 02:35:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:45,928 INFO L225 Difference]: With dead ends: 16 [2022-07-21 02:35:45,928 INFO L226 Difference]: Without dead ends: 10 [2022-07-21 02:35:45,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:35:45,930 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:45,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:35:45,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-21 02:35:45,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-07-21 02:35:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-21 02:35:45,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-07-21 02:35:45,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:45,936 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-21 02:35:45,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:45,937 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-21 02:35:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 02:35:45,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:45,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:35:45,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:35:45,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:45,938 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2022-07-21 02:35:45,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:35:45,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384074522] [2022-07-21 02:35:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:35:45,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:35:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:35:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:35:45,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:35:45,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384074522] [2022-07-21 02:35:45,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384074522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:35:45,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129644967] [2022-07-21 02:35:45,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:35:45,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:35:45,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:35:45,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:35:45,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:35:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:35:46,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 02:35:46,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:35:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:35:46,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:35:46,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129644967] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:46,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:35:46,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-21 02:35:46,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158550089] [2022-07-21 02:35:46,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:46,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 02:35:46,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:35:46,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 02:35:46,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:35:46,100 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:46,158 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-07-21 02:35:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 02:35:46,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) Word has length 8 [2022-07-21 02:35:46,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:46,159 INFO L225 Difference]: With dead ends: 20 [2022-07-21 02:35:46,159 INFO L226 Difference]: Without dead ends: 14 [2022-07-21 02:35:46,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:35:46,162 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:46,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:35:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-21 02:35:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-07-21 02:35:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-07-21 02:35:46,168 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2022-07-21 02:35:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:46,168 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-07-21 02:35:46,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-07-21 02:35:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 02:35:46,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:46,169 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:35:46,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:35:46,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:35:46,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2022-07-21 02:35:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:35:46,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135296584] [2022-07-21 02:35:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:35:46,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:35:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:35:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:35:46,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:35:46,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135296584] [2022-07-21 02:35:46,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135296584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:35:46,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8641019] [2022-07-21 02:35:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:35:46,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:35:46,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:35:46,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:35:46,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 02:35:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:35:46,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 02:35:46,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:35:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:35:46,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 02:35:46,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8641019] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:46,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:35:46,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 10 [2022-07-21 02:35:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361350581] [2022-07-21 02:35:46,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:46,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 02:35:46,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:35:46,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 02:35:46,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-21 02:35:46,706 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:46,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:46,777 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-07-21 02:35:46,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 02:35:46,778 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 02:35:46,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:46,780 INFO L225 Difference]: With dead ends: 27 [2022-07-21 02:35:46,780 INFO L226 Difference]: Without dead ends: 18 [2022-07-21 02:35:46,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-21 02:35:46,783 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:46,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 23 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:35:46,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-21 02:35:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-07-21 02:35:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-21 02:35:46,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-07-21 02:35:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:46,793 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-21 02:35:46,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-21 02:35:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 02:35:46,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:46,794 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:35:46,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:35:46,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 02:35:46,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 2 times [2022-07-21 02:35:47,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:35:47,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581760015] [2022-07-21 02:35:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:35:47,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:35:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:35:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:35:47,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:35:47,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581760015] [2022-07-21 02:35:47,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581760015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:35:47,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288558563] [2022-07-21 02:35:47,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:35:47,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:35:47,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:35:47,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:35:47,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 02:35:47,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:35:47,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:35:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 02:35:47,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:35:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:35:47,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:35:47,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288558563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:47,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:35:47,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2022-07-21 02:35:47,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975781448] [2022-07-21 02:35:47,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:47,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 02:35:47,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:35:47,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 02:35:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-07-21 02:35:47,304 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:47,543 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-07-21 02:35:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 02:35:47,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 02:35:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:47,544 INFO L225 Difference]: With dead ends: 36 [2022-07-21 02:35:47,544 INFO L226 Difference]: Without dead ends: 27 [2022-07-21 02:35:47,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2022-07-21 02:35:47,544 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:47,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:35:47,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-21 02:35:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-21 02:35:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-07-21 02:35:47,549 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 14 [2022-07-21 02:35:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:47,550 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-07-21 02:35:47,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-07-21 02:35:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 02:35:47,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:47,551 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:35:47,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:35:47,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:35:47,764 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:47,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1990618095, now seen corresponding path program 3 times [2022-07-21 02:35:47,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:35:47,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253102879] [2022-07-21 02:35:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:35:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:35:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:35:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:35:47,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:35:47,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253102879] [2022-07-21 02:35:47,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253102879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:35:47,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081372707] [2022-07-21 02:35:47,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:35:47,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:35:47,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:35:47,920 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:35:47,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 02:35:48,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 02:35:48,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:35:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 02:35:48,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:35:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-21 02:35:48,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-21 02:35:48,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081372707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:48,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:35:48,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 7] total 19 [2022-07-21 02:35:48,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887210316] [2022-07-21 02:35:48,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:48,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 02:35:48,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:35:48,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 02:35:48,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:35:48,305 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:35:48,563 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-07-21 02:35:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 02:35:48,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 26 [2022-07-21 02:35:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:35:48,566 INFO L225 Difference]: With dead ends: 55 [2022-07-21 02:35:48,566 INFO L226 Difference]: Without dead ends: 44 [2022-07-21 02:35:48,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-07-21 02:35:48,567 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:35:48,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 20 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:35:48,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-21 02:35:48,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-07-21 02:35:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-07-21 02:35:48,573 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2022-07-21 02:35:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:35:48,573 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-07-21 02:35:48,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:35:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-07-21 02:35:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 02:35:48,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:35:48,574 INFO L195 NwaCegarLoop]: trace histogram [15, 11, 4, 1, 1, 1, 1, 1, 1] [2022-07-21 02:35:48,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 02:35:48,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:35:48,779 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:35:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:35:48,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2051424454, now seen corresponding path program 4 times [2022-07-21 02:35:48,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:35:48,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795867025] [2022-07-21 02:35:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:35:48,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:35:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:35:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 84 proven. 132 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 02:35:48,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:35:48,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795867025] [2022-07-21 02:35:48,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795867025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:35:48,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431433708] [2022-07-21 02:35:48,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:35:48,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:35:48,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:35:48,964 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:35:48,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 02:35:48,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:35:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:35:48,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 02:35:49,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:35:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 02:35:49,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:35:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 02:35:49,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431433708] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:35:49,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:35:49,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 17] total 32 [2022-07-21 02:35:49,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862256277] [2022-07-21 02:35:49,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:35:49,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 02:35:49,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:35:49,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 02:35:49,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-07-21 02:35:49,627 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:36:02,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:36:02,997 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2022-07-21 02:36:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 02:36:02,997 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-21 02:36:02,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:36:02,998 INFO L225 Difference]: With dead ends: 92 [2022-07-21 02:36:02,998 INFO L226 Difference]: Without dead ends: 73 [2022-07-21 02:36:02,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=747, Invalid=1323, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 02:36:03,000 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 02:36:03,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 34 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 02:36:03,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-21 02:36:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-21 02:36:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:36:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2022-07-21 02:36:03,010 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 36 [2022-07-21 02:36:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:36:03,010 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2022-07-21 02:36:03,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:36:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2022-07-21 02:36:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 02:36:03,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:36:03,012 INFO L195 NwaCegarLoop]: trace histogram [31, 27, 4, 1, 1, 1, 1, 1, 1] [2022-07-21 02:36:03,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 02:36:03,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:36:03,213 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:36:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:36:03,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1213758218, now seen corresponding path program 5 times [2022-07-21 02:36:03,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:36:03,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046128902] [2022-07-21 02:36:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:36:03,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:36:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:36:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 196 proven. 756 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 02:36:03,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:36:03,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046128902] [2022-07-21 02:36:03,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046128902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:36:03,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311142316] [2022-07-21 02:36:03,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:36:03,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:36:03,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:36:03,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:36:03,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 02:36:08,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-07-21 02:36:08,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:36:08,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 02:36:08,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:36:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 145 proven. 812 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 02:36:08,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:36:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 145 proven. 812 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 02:36:10,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311142316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:36:10,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:36:10,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 32] total 62 [2022-07-21 02:36:10,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119807371] [2022-07-21 02:36:10,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:36:10,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-21 02:36:10,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:36:10,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-21 02:36:10,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=2732, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 02:36:10,643 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:36:39,455 WARN L233 SmtUtils]: Spent 14.53s on a formula simplification. DAG size of input: 203 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 02:37:01,121 WARN L233 SmtUtils]: Spent 7.62s on a formula simplification. DAG size of input: 196 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 02:37:30,323 WARN L233 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 189 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 02:37:58,622 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 182 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)