./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6994f5bfaf30a704120445031d2592cb0b289806736d22478b28cc84ed2b2216 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 18:04:20,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 18:04:20,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 18:04:20,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 18:04:20,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 18:04:20,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 18:04:20,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 18:04:20,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 18:04:20,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 18:04:20,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 18:04:20,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 18:04:20,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 18:04:20,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 18:04:20,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 18:04:20,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 18:04:20,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 18:04:20,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 18:04:20,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 18:04:20,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 18:04:20,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 18:04:20,203 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 18:04:20,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 18:04:20,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 18:04:20,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 18:04:20,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 18:04:20,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 18:04:20,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 18:04:20,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 18:04:20,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 18:04:20,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 18:04:20,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 18:04:20,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 18:04:20,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 18:04:20,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 18:04:20,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 18:04:20,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 18:04:20,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 18:04:20,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 18:04:20,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 18:04:20,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 18:04:20,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 18:04:20,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 18:04:20,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 18:04:20,245 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 18:04:20,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 18:04:20,246 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 18:04:20,246 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 18:04:20,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 18:04:20,247 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 18:04:20,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 18:04:20,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 18:04:20,248 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 18:04:20,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 18:04:20,248 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 18:04:20,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 18:04:20,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 18:04:20,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 18:04:20,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 18:04:20,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 18:04:20,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 18:04:20,250 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 18:04:20,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 18:04:20,251 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 18:04:20,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 18:04:20,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 18:04:20,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 18:04:20,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 18:04:20,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 18:04:20,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 18:04:20,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 18:04:20,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 18:04:20,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 18:04:20,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 18:04:20,253 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 18:04:20,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 18:04:20,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 18:04:20,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6994f5bfaf30a704120445031d2592cb0b289806736d22478b28cc84ed2b2216 [2022-07-22 18:04:20,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 18:04:20,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 18:04:20,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 18:04:20,474 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 18:04:20,474 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 18:04:20,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c [2022-07-22 18:04:20,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/636c22838/11c1c77c86424704a1568dd5170bbf2e/FLAGbb9f6235d [2022-07-22 18:04:20,883 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 18:04:20,884 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c [2022-07-22 18:04:20,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/636c22838/11c1c77c86424704a1568dd5170bbf2e/FLAGbb9f6235d [2022-07-22 18:04:20,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/636c22838/11c1c77c86424704a1568dd5170bbf2e [2022-07-22 18:04:20,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 18:04:20,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 18:04:20,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 18:04:20,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 18:04:20,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 18:04:20,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 06:04:20" (1/1) ... [2022-07-22 18:04:20,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c676bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:20, skipping insertion in model container [2022-07-22 18:04:20,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 06:04:20" (1/1) ... [2022-07-22 18:04:20,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 18:04:20,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 18:04:21,166 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/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c[11335,11348] [2022-07-22 18:04:21,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 18:04:21,174 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 18:04:21,210 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/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c[11335,11348] [2022-07-22 18:04:21,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 18:04:21,221 INFO L208 MainTranslator]: Completed translation [2022-07-22 18:04:21,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21 WrapperNode [2022-07-22 18:04:21,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 18:04:21,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 18:04:21,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 18:04:21,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 18:04:21,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21" (1/1) ... [2022-07-22 18:04:21,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21" (1/1) ... [2022-07-22 18:04:21,303 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 329 [2022-07-22 18:04:21,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 18:04:21,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 18:04:21,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 18:04:21,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 18:04:21,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21" (1/1) ... [2022-07-22 18:04:21,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21" (1/1) ... [2022-07-22 18:04:21,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21" (1/1) ... [2022-07-22 18:04:21,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21" (1/1) ... [2022-07-22 18:04:21,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21" (1/1) ... [2022-07-22 18:04:21,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21" (1/1) ... [2022-07-22 18:04:21,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21" (1/1) ... [2022-07-22 18:04:21,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 18:04:21,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 18:04:21,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 18:04:21,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 18:04:21,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21" (1/1) ... [2022-07-22 18:04:21,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 18:04:21,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 18:04:21,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 18:04:21,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 18:04:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 18:04:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 18:04:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 18:04:21,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 18:04:21,519 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 18:04:21,520 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 18:04:21,898 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 18:04:21,903 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 18:04:21,903 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 18:04:21,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 06:04:21 BoogieIcfgContainer [2022-07-22 18:04:21,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 18:04:21,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 18:04:21,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 18:04:21,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 18:04:21,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 06:04:20" (1/3) ... [2022-07-22 18:04:21,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba365e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 06:04:21, skipping insertion in model container [2022-07-22 18:04:21,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:04:21" (2/3) ... [2022-07-22 18:04:21,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba365e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 06:04:21, skipping insertion in model container [2022-07-22 18:04:21,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 06:04:21" (3/3) ... [2022-07-22 18:04:21,911 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c [2022-07-22 18:04:21,920 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 18:04:21,920 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 18:04:21,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 18:04:21,964 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@4eca8ebf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b2acb62 [2022-07-22 18:04:21,964 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 18:04:21,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 91 states have (on average 1.7252747252747254) internal successors, (157), 92 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 18:04:21,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:21,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:21,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:21,979 INFO L85 PathProgramCache]: Analyzing trace with hash 8392247, now seen corresponding path program 1 times [2022-07-22 18:04:21,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:21,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110890382] [2022-07-22 18:04:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:21,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:22,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:22,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110890382] [2022-07-22 18:04:22,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110890382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:22,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:22,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 18:04:22,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99159762] [2022-07-22 18:04:22,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:22,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 18:04:22,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 18:04:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 18:04:22,182 INFO L87 Difference]: Start difference. First operand has 93 states, 91 states have (on average 1.7252747252747254) internal successors, (157), 92 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:22,220 INFO L93 Difference]: Finished difference Result 146 states and 243 transitions. [2022-07-22 18:04:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 18:04:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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 33 [2022-07-22 18:04:22,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:22,228 INFO L225 Difference]: With dead ends: 146 [2022-07-22 18:04:22,228 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 18:04:22,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 18:04:22,234 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:22,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:22,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 18:04:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-22 18:04:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.7045454545454546) internal successors, (150), 88 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 150 transitions. [2022-07-22 18:04:22,267 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 150 transitions. Word has length 33 [2022-07-22 18:04:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:22,267 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 150 transitions. [2022-07-22 18:04:22,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 150 transitions. [2022-07-22 18:04:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 18:04:22,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:22,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:22,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 18:04:22,271 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:22,272 INFO L85 PathProgramCache]: Analyzing trace with hash -501080843, now seen corresponding path program 1 times [2022-07-22 18:04:22,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:22,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613631789] [2022-07-22 18:04:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:22,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:22,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:22,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613631789] [2022-07-22 18:04:22,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613631789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:22,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:22,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:04:22,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175278472] [2022-07-22 18:04:22,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:22,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:04:22,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:22,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:04:22,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:04:22,379 INFO L87 Difference]: Start difference. First operand 89 states and 150 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:22,458 INFO L93 Difference]: Finished difference Result 145 states and 236 transitions. [2022-07-22 18:04:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:04:22,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2022-07-22 18:04:22,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:22,461 INFO L225 Difference]: With dead ends: 145 [2022-07-22 18:04:22,461 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 18:04:22,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:04:22,465 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 3 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:22,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 558 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 18:04:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-22 18:04:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3522727272727273) internal successors, (119), 88 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2022-07-22 18:04:22,472 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 33 [2022-07-22 18:04:22,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:22,473 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2022-07-22 18:04:22,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2022-07-22 18:04:22,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 18:04:22,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:22,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:22,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 18:04:22,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:22,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:22,478 INFO L85 PathProgramCache]: Analyzing trace with hash 988628396, now seen corresponding path program 1 times [2022-07-22 18:04:22,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:22,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184509708] [2022-07-22 18:04:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:22,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:22,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:22,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184509708] [2022-07-22 18:04:22,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184509708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:22,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:22,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:04:22,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824953738] [2022-07-22 18:04:22,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:22,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:04:22,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:22,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:04:22,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:22,543 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:22,555 INFO L93 Difference]: Finished difference Result 187 states and 273 transitions. [2022-07-22 18:04:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:04:22,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2022-07-22 18:04:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:22,557 INFO L225 Difference]: With dead ends: 187 [2022-07-22 18:04:22,557 INFO L226 Difference]: Without dead ends: 135 [2022-07-22 18:04:22,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:22,558 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 72 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:22,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 267 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-22 18:04:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-07-22 18:04:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.4318181818181819) internal successors, (189), 132 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 189 transitions. [2022-07-22 18:04:22,566 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 189 transitions. Word has length 63 [2022-07-22 18:04:22,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:22,566 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 189 transitions. [2022-07-22 18:04:22,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 189 transitions. [2022-07-22 18:04:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 18:04:22,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:22,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:22,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 18:04:22,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:22,568 INFO L85 PathProgramCache]: Analyzing trace with hash 243045666, now seen corresponding path program 1 times [2022-07-22 18:04:22,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:22,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921552694] [2022-07-22 18:04:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:22,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:22,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:22,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921552694] [2022-07-22 18:04:22,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921552694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:22,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:22,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:04:22,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427581987] [2022-07-22 18:04:22,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:22,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:04:22,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:22,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:04:22,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:22,656 INFO L87 Difference]: Start difference. First operand 133 states and 189 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:22,686 INFO L93 Difference]: Finished difference Result 313 states and 473 transitions. [2022-07-22 18:04:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:04:22,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2022-07-22 18:04:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:22,688 INFO L225 Difference]: With dead ends: 313 [2022-07-22 18:04:22,688 INFO L226 Difference]: Without dead ends: 217 [2022-07-22 18:04:22,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:22,691 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 68 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:22,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 266 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:22,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-22 18:04:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2022-07-22 18:04:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 318 transitions. [2022-07-22 18:04:22,716 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 318 transitions. Word has length 63 [2022-07-22 18:04:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:22,717 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 318 transitions. [2022-07-22 18:04:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 318 transitions. [2022-07-22 18:04:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 18:04:22,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:22,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:22,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 18:04:22,721 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:22,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1696985192, now seen corresponding path program 1 times [2022-07-22 18:04:22,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:22,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745332870] [2022-07-22 18:04:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:22,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:22,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:22,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745332870] [2022-07-22 18:04:22,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745332870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:22,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:22,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:04:22,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703151633] [2022-07-22 18:04:22,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:22,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:04:22,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:22,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:04:22,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:22,813 INFO L87 Difference]: Start difference. First operand 215 states and 318 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:22,844 INFO L93 Difference]: Finished difference Result 547 states and 840 transitions. [2022-07-22 18:04:22,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:04:22,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2022-07-22 18:04:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:22,852 INFO L225 Difference]: With dead ends: 547 [2022-07-22 18:04:22,852 INFO L226 Difference]: Without dead ends: 369 [2022-07-22 18:04:22,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:22,853 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 64 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:22,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 265 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-07-22 18:04:22,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 367. [2022-07-22 18:04:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.5136612021857923) internal successors, (554), 366 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 554 transitions. [2022-07-22 18:04:22,884 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 554 transitions. Word has length 63 [2022-07-22 18:04:22,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:22,884 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 554 transitions. [2022-07-22 18:04:22,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,885 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 554 transitions. [2022-07-22 18:04:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 18:04:22,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:22,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:22,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 18:04:22,886 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:22,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1003697422, now seen corresponding path program 1 times [2022-07-22 18:04:22,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:22,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801765163] [2022-07-22 18:04:22,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:22,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:22,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:22,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801765163] [2022-07-22 18:04:22,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801765163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:22,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:22,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:04:22,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178490983] [2022-07-22 18:04:22,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:22,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:04:22,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:04:22,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:22,925 INFO L87 Difference]: Start difference. First operand 367 states and 554 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:22,947 INFO L93 Difference]: Finished difference Result 979 states and 1508 transitions. [2022-07-22 18:04:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:04:22,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2022-07-22 18:04:22,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:22,950 INFO L225 Difference]: With dead ends: 979 [2022-07-22 18:04:22,950 INFO L226 Difference]: Without dead ends: 649 [2022-07-22 18:04:22,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:22,952 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 60 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:22,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 264 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-07-22 18:04:22,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 647. [2022-07-22 18:04:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 1.520123839009288) internal successors, (982), 646 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 982 transitions. [2022-07-22 18:04:22,978 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 982 transitions. Word has length 63 [2022-07-22 18:04:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:22,978 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 982 transitions. [2022-07-22 18:04:22,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 982 transitions. [2022-07-22 18:04:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 18:04:22,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:22,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:22,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 18:04:22,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1341490564, now seen corresponding path program 1 times [2022-07-22 18:04:22,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:22,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343803883] [2022-07-22 18:04:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:22,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:23,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:23,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343803883] [2022-07-22 18:04:23,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343803883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:23,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:23,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:04:23,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907950580] [2022-07-22 18:04:23,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:23,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:04:23,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:23,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:04:23,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:23,016 INFO L87 Difference]: Start difference. First operand 647 states and 982 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:23,059 INFO L93 Difference]: Finished difference Result 1771 states and 2712 transitions. [2022-07-22 18:04:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:04:23,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2022-07-22 18:04:23,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:23,087 INFO L225 Difference]: With dead ends: 1771 [2022-07-22 18:04:23,088 INFO L226 Difference]: Without dead ends: 1161 [2022-07-22 18:04:23,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:23,089 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 56 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:23,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 263 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:23,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-07-22 18:04:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1159. [2022-07-22 18:04:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 1.5112262521588946) internal successors, (1750), 1158 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1750 transitions. [2022-07-22 18:04:23,135 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1750 transitions. Word has length 63 [2022-07-22 18:04:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:23,136 INFO L495 AbstractCegarLoop]: Abstraction has 1159 states and 1750 transitions. [2022-07-22 18:04:23,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1750 transitions. [2022-07-22 18:04:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 18:04:23,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:23,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:23,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 18:04:23,138 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:23,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1735491334, now seen corresponding path program 1 times [2022-07-22 18:04:23,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:23,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980344271] [2022-07-22 18:04:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:23,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:23,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:23,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980344271] [2022-07-22 18:04:23,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980344271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:23,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:23,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 18:04:23,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920474540] [2022-07-22 18:04:23,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:23,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 18:04:23,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:23,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 18:04:23,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:04:23,225 INFO L87 Difference]: Start difference. First operand 1159 states and 1750 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:23,847 INFO L93 Difference]: Finished difference Result 12379 states and 18880 transitions. [2022-07-22 18:04:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 18:04:23,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 63 [2022-07-22 18:04:23,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:23,880 INFO L225 Difference]: With dead ends: 12379 [2022-07-22 18:04:23,880 INFO L226 Difference]: Without dead ends: 11257 [2022-07-22 18:04:23,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-22 18:04:23,887 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1317 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:23,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1317 Valid, 953 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:04:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2022-07-22 18:04:24,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 2279. [2022-07-22 18:04:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 1.491659350307287) internal successors, (3398), 2278 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3398 transitions. [2022-07-22 18:04:24,088 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3398 transitions. Word has length 63 [2022-07-22 18:04:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:24,088 INFO L495 AbstractCegarLoop]: Abstraction has 2279 states and 3398 transitions. [2022-07-22 18:04:24,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3398 transitions. [2022-07-22 18:04:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 18:04:24,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:24,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:24,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 18:04:24,089 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:24,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1519410410, now seen corresponding path program 1 times [2022-07-22 18:04:24,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:24,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557926515] [2022-07-22 18:04:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:24,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:24,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:24,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557926515] [2022-07-22 18:04:24,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557926515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:24,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:24,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:04:24,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962761652] [2022-07-22 18:04:24,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:24,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:04:24,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:04:24,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:24,128 INFO L87 Difference]: Start difference. First operand 2279 states and 3398 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:24,338 INFO L93 Difference]: Finished difference Result 5565 states and 8314 transitions. [2022-07-22 18:04:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:04:24,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2022-07-22 18:04:24,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:24,347 INFO L225 Difference]: With dead ends: 5565 [2022-07-22 18:04:24,348 INFO L226 Difference]: Without dead ends: 3323 [2022-07-22 18:04:24,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:04:24,350 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 48 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:24,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 226 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2022-07-22 18:04:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3321. [2022-07-22 18:04:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.4771084337349398) internal successors, (4904), 3320 states have internal predecessors, (4904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 4904 transitions. [2022-07-22 18:04:24,563 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 4904 transitions. Word has length 65 [2022-07-22 18:04:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:24,563 INFO L495 AbstractCegarLoop]: Abstraction has 3321 states and 4904 transitions. [2022-07-22 18:04:24,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 4904 transitions. [2022-07-22 18:04:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 18:04:24,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:24,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:24,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 18:04:24,568 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1585903922, now seen corresponding path program 1 times [2022-07-22 18:04:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:24,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323922857] [2022-07-22 18:04:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:24,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:24,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323922857] [2022-07-22 18:04:24,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323922857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:24,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:24,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 18:04:24,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385455580] [2022-07-22 18:04:24,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:24,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 18:04:24,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:24,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 18:04:24,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:04:24,713 INFO L87 Difference]: Start difference. First operand 3321 states and 4904 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:24,987 INFO L93 Difference]: Finished difference Result 6605 states and 9770 transitions. [2022-07-22 18:04:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 18:04:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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 65 [2022-07-22 18:04:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:24,996 INFO L225 Difference]: With dead ends: 6605 [2022-07-22 18:04:24,996 INFO L226 Difference]: Without dead ends: 3323 [2022-07-22 18:04:24,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-22 18:04:24,998 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 235 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:24,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 507 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:25,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2022-07-22 18:04:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3321. [2022-07-22 18:04:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.4626506024096386) internal successors, (4856), 3320 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 4856 transitions. [2022-07-22 18:04:25,198 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 4856 transitions. Word has length 65 [2022-07-22 18:04:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:25,199 INFO L495 AbstractCegarLoop]: Abstraction has 3321 states and 4856 transitions. [2022-07-22 18:04:25,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 4856 transitions. [2022-07-22 18:04:25,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 18:04:25,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:25,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:25,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 18:04:25,201 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:25,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:25,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1503658279, now seen corresponding path program 1 times [2022-07-22 18:04:25,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:25,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706481199] [2022-07-22 18:04:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:25,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:25,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:25,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706481199] [2022-07-22 18:04:25,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706481199] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:25,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:25,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 18:04:25,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798398049] [2022-07-22 18:04:25,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:25,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 18:04:25,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:25,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 18:04:25,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 18:04:25,274 INFO L87 Difference]: Start difference. First operand 3321 states and 4856 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:25,714 INFO L93 Difference]: Finished difference Result 6164 states and 8906 transitions. [2022-07-22 18:04:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 18:04:25,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 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 66 [2022-07-22 18:04:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:25,731 INFO L225 Difference]: With dead ends: 6164 [2022-07-22 18:04:25,731 INFO L226 Difference]: Without dead ends: 6162 [2022-07-22 18:04:25,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-22 18:04:25,733 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 628 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:25,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 580 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6162 states. [2022-07-22 18:04:25,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6162 to 3513. [2022-07-22 18:04:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 1.4328018223234624) internal successors, (5032), 3512 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5032 transitions. [2022-07-22 18:04:25,996 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5032 transitions. Word has length 66 [2022-07-22 18:04:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:25,997 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 5032 transitions. [2022-07-22 18:04:25,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5032 transitions. [2022-07-22 18:04:25,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-22 18:04:25,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:25,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:25,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 18:04:25,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:26,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:26,000 INFO L85 PathProgramCache]: Analyzing trace with hash 550206538, now seen corresponding path program 1 times [2022-07-22 18:04:26,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:26,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640525806] [2022-07-22 18:04:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:26,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 18:04:26,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:26,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640525806] [2022-07-22 18:04:26,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640525806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:26,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:26,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 18:04:26,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000805596] [2022-07-22 18:04:26,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:26,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 18:04:26,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:26,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 18:04:26,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:04:26,053 INFO L87 Difference]: Start difference. First operand 3513 states and 5032 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:27,058 INFO L93 Difference]: Finished difference Result 21589 states and 30958 transitions. [2022-07-22 18:04:27,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 18:04:27,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-22 18:04:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:27,098 INFO L225 Difference]: With dead ends: 21589 [2022-07-22 18:04:27,099 INFO L226 Difference]: Without dead ends: 18115 [2022-07-22 18:04:27,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 18:04:27,108 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 843 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:27,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 673 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18115 states. [2022-07-22 18:04:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18115 to 6985. [2022-07-22 18:04:27,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6985 states, 6984 states have (on average 1.4284077892325315) internal successors, (9976), 6984 states have internal predecessors, (9976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6985 states to 6985 states and 9976 transitions. [2022-07-22 18:04:27,661 INFO L78 Accepts]: Start accepts. Automaton has 6985 states and 9976 transitions. Word has length 94 [2022-07-22 18:04:27,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:27,661 INFO L495 AbstractCegarLoop]: Abstraction has 6985 states and 9976 transitions. [2022-07-22 18:04:27,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 6985 states and 9976 transitions. [2022-07-22 18:04:27,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-22 18:04:27,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:27,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:27,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 18:04:27,664 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1218576278, now seen corresponding path program 1 times [2022-07-22 18:04:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:27,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137268176] [2022-07-22 18:04:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:27,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 18:04:27,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:27,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137268176] [2022-07-22 18:04:27,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137268176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:27,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:27,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 18:04:27,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302794727] [2022-07-22 18:04:27,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:27,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 18:04:27,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:27,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 18:04:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:04:27,720 INFO L87 Difference]: Start difference. First operand 6985 states and 9976 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:28,800 INFO L93 Difference]: Finished difference Result 25061 states and 35902 transitions. [2022-07-22 18:04:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 18:04:28,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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 94 [2022-07-22 18:04:28,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:28,836 INFO L225 Difference]: With dead ends: 25061 [2022-07-22 18:04:28,836 INFO L226 Difference]: Without dead ends: 21587 [2022-07-22 18:04:28,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 18:04:28,848 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 741 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:28,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 722 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21587 states. [2022-07-22 18:04:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21587 to 12201. [2022-07-22 18:04:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12201 states, 12200 states have (on average 1.422295081967213) internal successors, (17352), 12200 states have internal predecessors, (17352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12201 states to 12201 states and 17352 transitions. [2022-07-22 18:04:29,751 INFO L78 Accepts]: Start accepts. Automaton has 12201 states and 17352 transitions. Word has length 94 [2022-07-22 18:04:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:29,751 INFO L495 AbstractCegarLoop]: Abstraction has 12201 states and 17352 transitions. [2022-07-22 18:04:29,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 12201 states and 17352 transitions. [2022-07-22 18:04:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-22 18:04:29,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:29,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:29,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 18:04:29,771 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:29,771 INFO L85 PathProgramCache]: Analyzing trace with hash -86936438, now seen corresponding path program 1 times [2022-07-22 18:04:29,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:29,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665520604] [2022-07-22 18:04:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:29,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 18:04:29,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:29,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665520604] [2022-07-22 18:04:29,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665520604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:29,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:29,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 18:04:29,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760004275] [2022-07-22 18:04:29,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:29,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 18:04:29,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:29,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 18:04:29,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:04:29,830 INFO L87 Difference]: Start difference. First operand 12201 states and 17352 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:31,209 INFO L93 Difference]: Finished difference Result 28533 states and 40846 transitions. [2022-07-22 18:04:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 18:04:31,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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 94 [2022-07-22 18:04:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:31,249 INFO L225 Difference]: With dead ends: 28533 [2022-07-22 18:04:31,249 INFO L226 Difference]: Without dead ends: 25059 [2022-07-22 18:04:31,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 18:04:31,262 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 754 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:31,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 766 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:04:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25059 states. [2022-07-22 18:04:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25059 to 15673. [2022-07-22 18:04:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15673 states, 15672 states have (on average 1.4226646248085757) internal successors, (22296), 15672 states have internal predecessors, (22296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15673 states to 15673 states and 22296 transitions. [2022-07-22 18:04:32,415 INFO L78 Accepts]: Start accepts. Automaton has 15673 states and 22296 transitions. Word has length 94 [2022-07-22 18:04:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:32,416 INFO L495 AbstractCegarLoop]: Abstraction has 15673 states and 22296 transitions. [2022-07-22 18:04:32,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 15673 states and 22296 transitions. [2022-07-22 18:04:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-22 18:04:32,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:32,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:32,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 18:04:32,421 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1322395478, now seen corresponding path program 1 times [2022-07-22 18:04:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124991177] [2022-07-22 18:04:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:32,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 18:04:32,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:32,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124991177] [2022-07-22 18:04:32,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124991177] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:32,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:32,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 18:04:32,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477881626] [2022-07-22 18:04:32,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:32,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 18:04:32,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:32,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 18:04:32,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:04:32,475 INFO L87 Difference]: Start difference. First operand 15673 states and 22296 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:34,460 INFO L93 Difference]: Finished difference Result 32005 states and 45790 transitions. [2022-07-22 18:04:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 18:04:34,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-22 18:04:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:34,504 INFO L225 Difference]: With dead ends: 32005 [2022-07-22 18:04:34,504 INFO L226 Difference]: Without dead ends: 28531 [2022-07-22 18:04:34,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 18:04:34,517 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 824 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:34,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 771 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:04:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28531 states. [2022-07-22 18:04:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28531 to 19145. [2022-07-22 18:04:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19145 states, 19144 states have (on average 1.42290012536565) internal successors, (27240), 19144 states have internal predecessors, (27240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19145 states to 19145 states and 27240 transitions. [2022-07-22 18:04:35,919 INFO L78 Accepts]: Start accepts. Automaton has 19145 states and 27240 transitions. Word has length 94 [2022-07-22 18:04:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:35,919 INFO L495 AbstractCegarLoop]: Abstraction has 19145 states and 27240 transitions. [2022-07-22 18:04:35,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 19145 states and 27240 transitions. [2022-07-22 18:04:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-22 18:04:35,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:35,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:35,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 18:04:35,925 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1551576266, now seen corresponding path program 1 times [2022-07-22 18:04:35,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:35,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545421304] [2022-07-22 18:04:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:35,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 18:04:35,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:35,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545421304] [2022-07-22 18:04:35,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545421304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:04:35,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:04:35,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 18:04:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757817856] [2022-07-22 18:04:35,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:04:35,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 18:04:35,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 18:04:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:04:35,984 INFO L87 Difference]: Start difference. First operand 19145 states and 27240 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:04:38,285 INFO L93 Difference]: Finished difference Result 33397 states and 47790 transitions. [2022-07-22 18:04:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 18:04:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 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 94 [2022-07-22 18:04:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:04:38,330 INFO L225 Difference]: With dead ends: 33397 [2022-07-22 18:04:38,330 INFO L226 Difference]: Without dead ends: 30963 [2022-07-22 18:04:38,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 18:04:38,342 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 825 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:04:38,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 684 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:04:38,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30963 states. [2022-07-22 18:04:40,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30963 to 21577. [2022-07-22 18:04:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 21576 states have (on average 1.4241750092695589) internal successors, (30728), 21576 states have internal predecessors, (30728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:40,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 30728 transitions. [2022-07-22 18:04:40,346 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 30728 transitions. Word has length 94 [2022-07-22 18:04:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:04:40,347 INFO L495 AbstractCegarLoop]: Abstraction has 21577 states and 30728 transitions. [2022-07-22 18:04:40,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:04:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 30728 transitions. [2022-07-22 18:04:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 18:04:40,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:04:40,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 18:04:40,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 18:04:40,352 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:04:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:04:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1418973216, now seen corresponding path program 1 times [2022-07-22 18:04:40,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:04:40,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694238972] [2022-07-22 18:04:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:40,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:04:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 18:04:40,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:04:40,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694238972] [2022-07-22 18:04:40,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694238972] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 18:04:40,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094609896] [2022-07-22 18:04:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:04:40,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 18:04:40,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 18:04:40,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 18:04:40,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 18:04:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:04:40,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 18:04:40,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 18:04:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 18:04:40,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 18:04:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 18:04:41,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094609896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 18:04:41,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 18:04:41,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-07-22 18:04:41,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431187117] [2022-07-22 18:04:41,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 18:04:41,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 18:04:41,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:04:41,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 18:04:41,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-22 18:04:41,049 INFO L87 Difference]: Start difference. First operand 21577 states and 30728 transitions. Second operand has 18 states, 18 states have (on average 14.944444444444445) internal successors, (269), 18 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 18:05:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:05:13,511 INFO L93 Difference]: Finished difference Result 320361 states and 455634 transitions. [2022-07-22 18:05:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-07-22 18:05:13,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 14.944444444444445) internal successors, (269), 18 states have internal predecessors, (269), 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 95 [2022-07-22 18:05:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:05:14,562 INFO L225 Difference]: With dead ends: 320361 [2022-07-22 18:05:14,562 INFO L226 Difference]: Without dead ends: 298823 [2022-07-22 18:05:14,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11149 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4231, Invalid=21209, Unknown=0, NotChecked=0, Total=25440 [2022-07-22 18:05:14,763 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 6274 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6274 SdHoareTripleChecker+Valid, 2171 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 18:05:14,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6274 Valid, 2171 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 18:05:15,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298823 states.