./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/count_by_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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-new/count_by_2.i -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 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:06:17,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:06:17,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:06:17,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:06:17,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:06:17,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:06:17,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:06:17,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:06:17,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:06:17,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:06:17,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:06:17,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:06:17,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:06:17,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:06:17,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:06:17,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:06:17,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:06:17,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:06:17,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:06:17,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:06:17,254 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:06:17,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:06:17,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:06:17,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:06:17,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:06:17,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:06:17,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:06:17,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:06:17,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:06:17,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:06:17,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:06:17,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:06:17,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:06:17,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:06:17,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:06:17,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:06:17,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:06:17,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:06:17,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:06:17,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:06:17,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:06:17,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:06:17,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:06:17,297 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:06:17,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:06:17,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:06:17,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:06:17,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:06:17,299 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:06:17,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:06:17,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:06:17,299 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:06:17,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:06:17,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:06:17,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:06:17,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:06:17,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:06:17,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:06:17,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:06:17,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:06:17,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:06:17,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:06:17,303 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:06:17,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:06:17,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:06:17,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:06:17,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:06:17,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:06:17,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:06:17,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:06:17,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:06:17,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:06:17,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:06:17,305 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:06:17,305 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:06:17,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:06:17,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 [2022-07-19 15:06:17,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:06:17,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:06:17,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:06:17,479 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:06:17,479 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:06:17,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_2.i [2022-07-19 15:06:17,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14e01c6e/dbb764894d5b4c958659e613a95a31f3/FLAGdc09bac10 [2022-07-19 15:06:17,885 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:06:17,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i [2022-07-19 15:06:17,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14e01c6e/dbb764894d5b4c958659e613a95a31f3/FLAGdc09bac10 [2022-07-19 15:06:17,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14e01c6e/dbb764894d5b4c958659e613a95a31f3 [2022-07-19 15:06:17,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:06:17,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:06:17,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:06:17,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:06:17,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:06:17,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:06:17" (1/1) ... [2022-07-19 15:06:17,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aba83b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:17, skipping insertion in model container [2022-07-19 15:06:17,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:06:17" (1/1) ... [2022-07-19 15:06:17,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:06:17,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:06:18,077 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-new/count_by_2.i[891,904] [2022-07-19 15:06:18,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:06:18,092 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:06:18,102 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-new/count_by_2.i[891,904] [2022-07-19 15:06:18,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:06:18,113 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:06:18,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18 WrapperNode [2022-07-19 15:06:18,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:06:18,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:06:18,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:06:18,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:06:18,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18" (1/1) ... [2022-07-19 15:06:18,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18" (1/1) ... [2022-07-19 15:06:18,132 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 25 [2022-07-19 15:06:18,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:06:18,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:06:18,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:06:18,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:06:18,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18" (1/1) ... [2022-07-19 15:06:18,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18" (1/1) ... [2022-07-19 15:06:18,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18" (1/1) ... [2022-07-19 15:06:18,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18" (1/1) ... [2022-07-19 15:06:18,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18" (1/1) ... [2022-07-19 15:06:18,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18" (1/1) ... [2022-07-19 15:06:18,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18" (1/1) ... [2022-07-19 15:06:18,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:06:18,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:06:18,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:06:18,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:06:18,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18" (1/1) ... [2022-07-19 15:06:18,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:06:18,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:18,180 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) [2022-07-19 15:06:18,195 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 [2022-07-19 15:06:18,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:06:18,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:06:18,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:06:18,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:06:18,259 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:06:18,260 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:06:18,315 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:06:18,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:06:18,319 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 15:06:18,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:06:18 BoogieIcfgContainer [2022-07-19 15:06:18,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:06:18,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:06:18,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:06:18,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:06:18,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:06:17" (1/3) ... [2022-07-19 15:06:18,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326e61e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:06:18, skipping insertion in model container [2022-07-19 15:06:18,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:06:18" (2/3) ... [2022-07-19 15:06:18,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326e61e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:06:18, skipping insertion in model container [2022-07-19 15:06:18,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:06:18" (3/3) ... [2022-07-19 15:06:18,326 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2022-07-19 15:06:18,335 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:06:18,335 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:06:18,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:06:18,369 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@44395501, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5cae62c3 [2022-07-19 15:06:18,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:06:18,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) 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) [2022-07-19 15:06:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-19 15:06:18,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:18,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-19 15:06:18,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:18,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:18,380 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2022-07-19 15:06:18,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:18,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365994674] [2022-07-19 15:06:18,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:18,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:18,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:18,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365994674] [2022-07-19 15:06:18,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365994674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:06:18,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:06:18,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:06:18,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417758610] [2022-07-19 15:06:18,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:06:18,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 15:06:18,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:18,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 15:06:18,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:06:18,514 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) 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) 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) [2022-07-19 15:06:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:06:18,529 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-07-19 15:06:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 15:06:18,531 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 [2022-07-19 15:06:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:06:18,535 INFO L225 Difference]: With dead ends: 22 [2022-07-19 15:06:18,535 INFO L226 Difference]: Without dead ends: 10 [2022-07-19 15:06:18,538 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 [2022-07-19 15:06:18,542 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:06:18,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:06:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-19 15:06:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-07-19 15:06:18,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2022-07-19 15:06:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-07-19 15:06:18,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2022-07-19 15:06:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:06:18,564 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-07-19 15:06:18,564 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) [2022-07-19 15:06:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-07-19 15:06:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 15:06:18,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:18,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:06:18,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:06:18,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2022-07-19 15:06:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:18,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481172485] [2022-07-19 15:06:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:18,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481172485] [2022-07-19 15:06:18,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481172485] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:06:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132044032] [2022-07-19 15:06:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:18,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:18,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:18,609 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) [2022-07-19 15:06:18,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:06:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:18,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 15:06:18,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:06:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:18,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:06:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:18,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132044032] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:06:18,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:06:18,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 15:06:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909791279] [2022-07-19 15:06:18,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:06:18,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 15:06:18,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 15:06:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:06:18,693 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-07-19 15:06:18,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:06:18,713 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-07-19 15:06:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:06:18,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) Word has length 8 [2022-07-19 15:06:18,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:06:18,714 INFO L225 Difference]: With dead ends: 19 [2022-07-19 15:06:18,714 INFO L226 Difference]: Without dead ends: 15 [2022-07-19 15:06:18,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:06:18,715 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:06:18,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:06:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-19 15:06:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-19 15:06:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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) [2022-07-19 15:06:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-07-19 15:06:18,718 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-07-19 15:06:18,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:06:18,719 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-07-19 15:06:18,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-07-19 15:06:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-07-19 15:06:18,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 15:06:18,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:18,719 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-07-19 15:06:18,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 15:06:18,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:18,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 2 times [2022-07-19 15:06:18,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:18,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063557585] [2022-07-19 15:06:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:18,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:18,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:18,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063557585] [2022-07-19 15:06:18,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063557585] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:06:18,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786237711] [2022-07-19 15:06:18,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:06:18,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:18,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:18,997 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) [2022-07-19 15:06:18,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:06:19,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:06:19,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:06:19,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 15:06:19,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:06:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:19,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:06:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:19,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786237711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:06:19,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:06:19,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 15:06:19,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89572706] [2022-07-19 15:06:19,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:06:19,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 15:06:19,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:19,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 15:06:19,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:06:19,097 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2022-07-19 15:06:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:06:19,126 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-07-19 15:06:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 15:06:19,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 [2022-07-19 15:06:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:06:19,127 INFO L225 Difference]: With dead ends: 31 [2022-07-19 15:06:19,127 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 15:06:19,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:06:19,128 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:06:19,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:06:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 15:06:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-19 15:06:19,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2022-07-19 15:06:19,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-07-19 15:06:19,133 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-07-19 15:06:19,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:06:19,133 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-07-19 15:06:19,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2022-07-19 15:06:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-07-19 15:06:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 15:06:19,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:19,134 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-07-19 15:06:19,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 15:06:19,347 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,SelfDestructingSolverStorable2 [2022-07-19 15:06:19,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:19,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:19,348 INFO L85 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 3 times [2022-07-19 15:06:19,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:19,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523821913] [2022-07-19 15:06:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:19,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:19,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:19,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523821913] [2022-07-19 15:06:19,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523821913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:06:19,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234249742] [2022-07-19 15:06:19,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:06:19,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:19,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:19,487 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) [2022-07-19 15:06:19,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:06:19,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-19 15:06:19,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:06:19,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 15:06:19,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:06:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:19,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:06:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:19,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234249742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:06:19,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:06:19,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-19 15:06:19,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619188134] [2022-07-19 15:06:19,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:06:19,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 15:06:19,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:19,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 15:06:19,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 15:06:19,814 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:06:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:06:19,890 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-07-19 15:06:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 15:06:19,890 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 15:06:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:06:19,892 INFO L225 Difference]: With dead ends: 55 [2022-07-19 15:06:19,892 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 15:06:19,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 15:06:19,895 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:06:19,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 18 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:06:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 15:06:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-19 15:06:19,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:06:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-07-19 15:06:19,909 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-07-19 15:06:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:06:19,914 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-07-19 15:06:19,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:06:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-07-19 15:06:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 15:06:19,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:19,916 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-07-19 15:06:19,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 15:06:20,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:20,117 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 4 times [2022-07-19 15:06:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:20,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463279524] [2022-07-19 15:06:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:20,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:20,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:20,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463279524] [2022-07-19 15:06:20,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463279524] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:06:20,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226523305] [2022-07-19 15:06:20,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:06:20,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:20,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:20,415 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) [2022-07-19 15:06:20,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:06:20,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:06:20,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:06:20,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 15:06:20,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:06:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:20,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:06:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:21,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226523305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:06:21,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:06:21,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-19 15:06:21,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021416101] [2022-07-19 15:06:21,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:06:21,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 15:06:21,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:21,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 15:06:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 15:06:21,103 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 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) [2022-07-19 15:06:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:06:21,208 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-07-19 15:06:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 15:06:21,208 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 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 50 [2022-07-19 15:06:21,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:06:21,212 INFO L225 Difference]: With dead ends: 103 [2022-07-19 15:06:21,212 INFO L226 Difference]: Without dead ends: 99 [2022-07-19 15:06:21,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 15:06:21,213 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:06:21,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 18 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:06:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-19 15:06:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-19 15:06:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 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) [2022-07-19 15:06:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-07-19 15:06:21,226 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2022-07-19 15:06:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:06:21,226 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-07-19 15:06:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 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) [2022-07-19 15:06:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-07-19 15:06:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-19 15:06:21,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:21,229 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-07-19 15:06:21,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 15:06:21,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:21,447 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:21,447 INFO L85 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 5 times [2022-07-19 15:06:21,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:21,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50805956] [2022-07-19 15:06:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:21,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:22,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:22,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50805956] [2022-07-19 15:06:22,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50805956] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:06:22,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592311508] [2022-07-19 15:06:22,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:06:22,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:22,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:22,261 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) [2022-07-19 15:06:22,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:06:22,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-07-19 15:06:22,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:06:22,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 15:06:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:06:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:22,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:06:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:24,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592311508] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:06:24,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:06:24,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-19 15:06:24,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54347596] [2022-07-19 15:06:24,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:06:24,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-19 15:06:24,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:24,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-19 15:06:24,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-19 15:06:24,459 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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) [2022-07-19 15:06:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:06:24,672 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2022-07-19 15:06:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-19 15:06:24,672 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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 98 [2022-07-19 15:06:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:06:24,676 INFO L225 Difference]: With dead ends: 199 [2022-07-19 15:06:24,676 INFO L226 Difference]: Without dead ends: 195 [2022-07-19 15:06:24,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-19 15:06:24,692 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:06:24,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 18 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:06:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-19 15:06:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-07-19 15:06:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 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) [2022-07-19 15:06:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2022-07-19 15:06:24,714 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2022-07-19 15:06:24,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:06:24,716 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2022-07-19 15:06:24,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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) [2022-07-19 15:06:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2022-07-19 15:06:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-19 15:06:24,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:24,722 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2022-07-19 15:06:24,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 15:06:24,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:24,939 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:24,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1064733719, now seen corresponding path program 6 times [2022-07-19 15:06:24,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:24,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663595580] [2022-07-19 15:06:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:24,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:27,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:27,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663595580] [2022-07-19 15:06:27,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663595580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:06:27,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691336692] [2022-07-19 15:06:27,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:06:27,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:27,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:27,046 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) [2022-07-19 15:06:27,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:06:27,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-07-19 15:06:27,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:06:27,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-19 15:06:27,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:06:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:27,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:06:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:34,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691336692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:06:34,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:06:34,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-07-19 15:06:34,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896563256] [2022-07-19 15:06:34,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:06:34,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-07-19 15:06:34,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:34,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-07-19 15:06:34,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-07-19 15:06:34,500 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 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) [2022-07-19 15:06:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:06:35,043 INFO L93 Difference]: Finished difference Result 391 states and 486 transitions. [2022-07-19 15:06:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-07-19 15:06:35,044 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 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 194 [2022-07-19 15:06:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:06:35,045 INFO L225 Difference]: With dead ends: 391 [2022-07-19 15:06:35,045 INFO L226 Difference]: Without dead ends: 387 [2022-07-19 15:06:35,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-07-19 15:06:35,048 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 285 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:06:35,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 18 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:06:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-19 15:06:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-07-19 15:06:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 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) [2022-07-19 15:06:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2022-07-19 15:06:35,061 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2022-07-19 15:06:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:06:35,061 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2022-07-19 15:06:35,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 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) [2022-07-19 15:06:35,062 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2022-07-19 15:06:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-07-19 15:06:35,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:35,065 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1] [2022-07-19 15:06:35,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 15:06:35,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:35,271 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1658733399, now seen corresponding path program 7 times [2022-07-19 15:06:35,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:35,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504564707] [2022-07-19 15:06:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:35,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:45,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:45,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504564707] [2022-07-19 15:06:45,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504564707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:06:45,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488051135] [2022-07-19 15:06:45,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:06:45,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:45,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:45,145 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:06:45,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 15:06:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:45,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 192 conjunts are in the unsatisfiable core [2022-07-19 15:06:45,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:06:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:45,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:07:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:07:08,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488051135] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:07:08,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:07:08,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2022-07-19 15:07:08,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496437335] [2022-07-19 15:07:08,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:07:08,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-07-19 15:07:08,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:07:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-07-19 15:07:08,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-07-19 15:07:08,750 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 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) [2022-07-19 15:07:10,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:07:10,846 INFO L93 Difference]: Finished difference Result 775 states and 966 transitions. [2022-07-19 15:07:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-07-19 15:07:10,847 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 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 386 [2022-07-19 15:07:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:07:10,849 INFO L225 Difference]: With dead ends: 775 [2022-07-19 15:07:10,850 INFO L226 Difference]: Without dead ends: 771 [2022-07-19 15:07:10,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-07-19 15:07:10,857 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 573 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:07:10,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 24 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:07:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-07-19 15:07:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-07-19 15:07:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 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) [2022-07-19 15:07:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2022-07-19 15:07:10,873 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2022-07-19 15:07:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:07:10,873 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2022-07-19 15:07:10,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 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) [2022-07-19 15:07:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2022-07-19 15:07:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-07-19 15:07:10,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:07:10,885 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1] [2022-07-19 15:07:10,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 15:07:11,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:07:11,102 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:07:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:07:11,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1786531369, now seen corresponding path program 8 times [2022-07-19 15:07:11,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:07:11,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044970294] [2022-07-19 15:07:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:07:11,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:07:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:07:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:07:39,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:07:39,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044970294] [2022-07-19 15:07:39,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044970294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:07:39,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998287465] [2022-07-19 15:07:39,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:07:39,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:07:39,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:07:39,274 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:07:39,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 15:07:39,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:07:39,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:07:39,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 384 conjunts are in the unsatisfiable core [2022-07-19 15:07:39,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:07:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:07:39,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:09:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:09:01,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998287465] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:09:01,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:09:01,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 769 [2022-07-19 15:09:01,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337615789] [2022-07-19 15:09:01,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:09:01,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2022-07-19 15:09:01,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:09:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2022-07-19 15:09:02,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2022-07-19 15:09:02,045 INFO L87 Difference]: Start difference. First operand 771 states and 771 transitions. Second operand has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 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) [2022-07-19 15:09:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:09:17,439 INFO L93 Difference]: Finished difference Result 1543 states and 1926 transitions. [2022-07-19 15:09:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-07-19 15:09:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 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 770 [2022-07-19 15:09:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:09:17,462 INFO L225 Difference]: With dead ends: 1543 [2022-07-19 15:09:17,463 INFO L226 Difference]: Without dead ends: 1539 [2022-07-19 15:09:17,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1923 GetRequests, 1156 SyntacticMatches, 0 SemanticMatches, 767 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 108.6s TimeCoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2022-07-19 15:09:17,495 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:09:17,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1149 Valid, 33 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 15:09:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2022-07-19 15:09:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1539. [2022-07-19 15:09:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 1.0006501950585176) internal successors, (1539), 1538 states have internal predecessors, (1539), 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) [2022-07-19 15:09:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1539 transitions. [2022-07-19 15:09:17,518 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1539 transitions. Word has length 770 [2022-07-19 15:09:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:09:17,519 INFO L495 AbstractCegarLoop]: Abstraction has 1539 states and 1539 transitions. [2022-07-19 15:09:17,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 2.001300390117035) internal successors, (1539), 769 states have internal predecessors, (1539), 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) [2022-07-19 15:09:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1539 transitions. [2022-07-19 15:09:17,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1539 [2022-07-19 15:09:17,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:09:17,554 INFO L195 NwaCegarLoop]: trace histogram [766, 766, 1, 1, 1, 1, 1, 1] [2022-07-19 15:09:17,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 15:09:17,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 15:09:17,757 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:09:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:09:17,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1780911831, now seen corresponding path program 9 times [2022-07-19 15:09:17,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:09:17,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361875226] [2022-07-19 15:09:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:09:17,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:09:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat