./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.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 a2c5c77b8d7714bea640ff99a5b0e1a19cf307340ccbaffec9b7e0efde04f6ec --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:51:41,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:51:41,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:51:41,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:51:41,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:51:41,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:51:41,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:51:41,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:51:41,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:51:41,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:51:41,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:51:41,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:51:41,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:51:41,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:51:41,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:51:41,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:51:41,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:51:41,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:51:41,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:51:41,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:51:41,969 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:51:41,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:51:41,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:51:41,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:51:41,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:51:41,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:51:41,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:51:41,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:51:41,976 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:51:41,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:51:41,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:51:41,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:51:41,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:51:41,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:51:41,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:51:41,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:51:41,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:51:41,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:51:41,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:51:41,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:51:41,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:51:41,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:51:41,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:51:42,013 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:51:42,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:51:42,013 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:51:42,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:51:42,014 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:51:42,014 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:51:42,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:51:42,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:51:42,015 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:51:42,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:51:42,016 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:51:42,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:51:42,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:51:42,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:51:42,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:51:42,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:51:42,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:51:42,017 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:51:42,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:51:42,017 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:51:42,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:51:42,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:51:42,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:51:42,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:51:42,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:51:42,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:51:42,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:51:42,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:51:42,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:51:42,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:51:42,033 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:51:42,033 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:51:42,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:51:42,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2c5c77b8d7714bea640ff99a5b0e1a19cf307340ccbaffec9b7e0efde04f6ec [2022-07-19 17:51:42,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:51:42,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:51:42,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:51:42,253 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:51:42,255 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:51:42,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c [2022-07-19 17:51:42,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c19c5bee8/b1449a2750e14d128e6bec6c24d1a577/FLAGf8b070cb9 [2022-07-19 17:51:42,742 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:51:42,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c [2022-07-19 17:51:42,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c19c5bee8/b1449a2750e14d128e6bec6c24d1a577/FLAGf8b070cb9 [2022-07-19 17:51:43,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c19c5bee8/b1449a2750e14d128e6bec6c24d1a577 [2022-07-19 17:51:43,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:51:43,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:51:43,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:51:43,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:51:43,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:51:43,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb84957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43, skipping insertion in model container [2022-07-19 17:51:43,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:51:43,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:51:43,368 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_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c[12951,12964] [2022-07-19 17:51:43,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:51:43,377 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:51:43,421 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_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c[12951,12964] [2022-07-19 17:51:43,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:51:43,434 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:51:43,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43 WrapperNode [2022-07-19 17:51:43,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:51:43,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:51:43,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:51:43,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:51:43,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,517 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 467 [2022-07-19 17:51:43,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:51:43,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:51:43,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:51:43,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:51:43,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:51:43,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:51:43,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:51:43,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:51:43,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43" (1/1) ... [2022-07-19 17:51:43,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:51:43,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:51:43,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 17:51:43,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 17:51:43,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:51:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:51:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:51:43,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:51:43,749 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:51:43,750 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:51:44,271 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:51:44,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:51:44,279 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 17:51:44,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:51:44 BoogieIcfgContainer [2022-07-19 17:51:44,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:51:44,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:51:44,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:51:44,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:51:44,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:51:43" (1/3) ... [2022-07-19 17:51:44,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a388e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:51:44, skipping insertion in model container [2022-07-19 17:51:44,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:51:43" (2/3) ... [2022-07-19 17:51:44,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a388e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:51:44, skipping insertion in model container [2022-07-19 17:51:44,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:51:44" (3/3) ... [2022-07-19 17:51:44,293 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c [2022-07-19 17:51:44,305 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:51:44,306 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:51:44,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:51:44,370 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@1956e0db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3ee78088 [2022-07-19 17:51:44,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:51:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 141 states have (on average 1.7375886524822695) internal successors, (245), 142 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 17:51:44,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:44,396 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] [2022-07-19 17:51:44,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:44,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:44,401 INFO L85 PathProgramCache]: Analyzing trace with hash 126688108, now seen corresponding path program 1 times [2022-07-19 17:51:44,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:44,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568387292] [2022-07-19 17:51:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:44,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:44,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568387292] [2022-07-19 17:51:44,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568387292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:44,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:44,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 17:51:44,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203624241] [2022-07-19 17:51:44,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:44,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 17:51:44,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:44,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 17:51:44,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 17:51:44,609 INFO L87 Difference]: Start difference. First operand has 143 states, 141 states have (on average 1.7375886524822695) internal successors, (245), 142 states have internal predecessors, (245), 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 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:44,642 INFO L93 Difference]: Finished difference Result 229 states and 391 transitions. [2022-07-19 17:51:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 17:51:44,644 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2022-07-19 17:51:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:44,654 INFO L225 Difference]: With dead ends: 229 [2022-07-19 17:51:44,654 INFO L226 Difference]: Without dead ends: 139 [2022-07-19 17:51:44,657 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 [2022-07-19 17:51:44,659 INFO L413 NwaCegarLoop]: 238 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, 238 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 [2022-07-19 17:51:44,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-19 17:51:44,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-07-19 17:51:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.7246376811594204) internal successors, (238), 138 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 238 transitions. [2022-07-19 17:51:44,699 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 238 transitions. Word has length 37 [2022-07-19 17:51:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:44,699 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 238 transitions. [2022-07-19 17:51:44,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 238 transitions. [2022-07-19 17:51:44,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 17:51:44,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:44,701 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] [2022-07-19 17:51:44,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:51:44,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash -690960342, now seen corresponding path program 1 times [2022-07-19 17:51:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:44,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268887813] [2022-07-19 17:51:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:44,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:44,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:44,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268887813] [2022-07-19 17:51:44,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268887813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:44,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:44,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:51:44,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669645283] [2022-07-19 17:51:44,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:44,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:51:44,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:44,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:51:44,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:51:44,877 INFO L87 Difference]: Start difference. First operand 139 states and 238 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:44,970 INFO L93 Difference]: Finished difference Result 228 states and 384 transitions. [2022-07-19 17:51:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:51:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2022-07-19 17:51:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:44,972 INFO L225 Difference]: With dead ends: 228 [2022-07-19 17:51:44,972 INFO L226 Difference]: Without dead ends: 139 [2022-07-19 17:51:44,973 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 [2022-07-19 17:51:44,975 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 3 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:44,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 917 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:51:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-19 17:51:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-07-19 17:51:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5507246376811594) internal successors, (214), 138 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 214 transitions. [2022-07-19 17:51:44,985 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 214 transitions. Word has length 37 [2022-07-19 17:51:44,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:44,986 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 214 transitions. [2022-07-19 17:51:44,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:44,986 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 214 transitions. [2022-07-19 17:51:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 17:51:44,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:44,988 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] [2022-07-19 17:51:44,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 17:51:44,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:44,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:44,989 INFO L85 PathProgramCache]: Analyzing trace with hash 747585835, now seen corresponding path program 1 times [2022-07-19 17:51:44,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:44,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779184996] [2022-07-19 17:51:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:44,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:45,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:45,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779184996] [2022-07-19 17:51:45,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779184996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:45,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:45,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:51:45,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440917046] [2022-07-19 17:51:45,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:45,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:51:45,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:51:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:51:45,089 INFO L87 Difference]: Start difference. First operand 139 states and 214 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:45,150 INFO L93 Difference]: Finished difference Result 299 states and 480 transitions. [2022-07-19 17:51:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:51:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-19 17:51:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:45,152 INFO L225 Difference]: With dead ends: 299 [2022-07-19 17:51:45,152 INFO L226 Difference]: Without dead ends: 214 [2022-07-19 17:51:45,153 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 [2022-07-19 17:51:45,154 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 115 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:45,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 382 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-19 17:51:45,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2022-07-19 17:51:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.5714285714285714) internal successors, (330), 210 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 330 transitions. [2022-07-19 17:51:45,169 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 330 transitions. Word has length 60 [2022-07-19 17:51:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:45,169 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 330 transitions. [2022-07-19 17:51:45,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 330 transitions. [2022-07-19 17:51:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 17:51:45,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:45,172 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] [2022-07-19 17:51:45,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 17:51:45,172 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:45,173 INFO L85 PathProgramCache]: Analyzing trace with hash -53855584, now seen corresponding path program 1 times [2022-07-19 17:51:45,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:45,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328677761] [2022-07-19 17:51:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:45,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:45,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:45,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328677761] [2022-07-19 17:51:45,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328677761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:45,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:45,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:51:45,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368748597] [2022-07-19 17:51:45,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:45,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:51:45,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:45,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:51:45,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:51:45,249 INFO L87 Difference]: Start difference. First operand 211 states and 330 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:45,277 INFO L93 Difference]: Finished difference Result 509 states and 818 transitions. [2022-07-19 17:51:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:51:45,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2022-07-19 17:51:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:45,280 INFO L225 Difference]: With dead ends: 509 [2022-07-19 17:51:45,280 INFO L226 Difference]: Without dead ends: 352 [2022-07-19 17:51:45,281 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 [2022-07-19 17:51:45,282 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 117 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:45,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 395 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-07-19 17:51:45,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2022-07-19 17:51:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.5936599423631124) internal successors, (553), 347 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 553 transitions. [2022-07-19 17:51:45,317 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 553 transitions. Word has length 62 [2022-07-19 17:51:45,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:45,318 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 553 transitions. [2022-07-19 17:51:45,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:45,318 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 553 transitions. [2022-07-19 17:51:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 17:51:45,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:45,320 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] [2022-07-19 17:51:45,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 17:51:45,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:45,322 INFO L85 PathProgramCache]: Analyzing trace with hash -730458987, now seen corresponding path program 1 times [2022-07-19 17:51:45,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:45,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518321912] [2022-07-19 17:51:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:45,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:45,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:45,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518321912] [2022-07-19 17:51:45,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518321912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:45,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:45,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:51:45,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435509387] [2022-07-19 17:51:45,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:45,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:51:45,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:45,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:51:45,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:51:45,390 INFO L87 Difference]: Start difference. First operand 348 states and 553 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:45,436 INFO L93 Difference]: Finished difference Result 904 states and 1459 transitions. [2022-07-19 17:51:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:51:45,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2022-07-19 17:51:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:45,440 INFO L225 Difference]: With dead ends: 904 [2022-07-19 17:51:45,440 INFO L226 Difference]: Without dead ends: 610 [2022-07-19 17:51:45,442 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 [2022-07-19 17:51:45,443 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 111 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:45,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 396 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-07-19 17:51:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 604. [2022-07-19 17:51:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.6003316749585406) internal successors, (965), 603 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:45,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 965 transitions. [2022-07-19 17:51:45,510 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 965 transitions. Word has length 64 [2022-07-19 17:51:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:45,512 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 965 transitions. [2022-07-19 17:51:45,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 965 transitions. [2022-07-19 17:51:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 17:51:45,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:45,521 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] [2022-07-19 17:51:45,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 17:51:45,522 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:45,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:45,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1382576374, now seen corresponding path program 1 times [2022-07-19 17:51:45,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:45,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865783005] [2022-07-19 17:51:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:45,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:45,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:45,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865783005] [2022-07-19 17:51:45,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865783005] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:45,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:45,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:51:45,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907412918] [2022-07-19 17:51:45,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:45,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:51:45,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:45,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:51:45,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:51:45,591 INFO L87 Difference]: Start difference. First operand 604 states and 965 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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) [2022-07-19 17:51:45,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:45,785 INFO L93 Difference]: Finished difference Result 2616 states and 4275 transitions. [2022-07-19 17:51:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:51:45,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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 [2022-07-19 17:51:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:45,797 INFO L225 Difference]: With dead ends: 2616 [2022-07-19 17:51:45,798 INFO L226 Difference]: Without dead ends: 2066 [2022-07-19 17:51:45,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:51:45,806 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 936 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:45,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 1264 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:51:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2022-07-19 17:51:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1086. [2022-07-19 17:51:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 1.6110599078341015) internal successors, (1748), 1085 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1748 transitions. [2022-07-19 17:51:45,872 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1748 transitions. Word has length 66 [2022-07-19 17:51:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:45,873 INFO L495 AbstractCegarLoop]: Abstraction has 1086 states and 1748 transitions. [2022-07-19 17:51:45,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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) [2022-07-19 17:51:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1748 transitions. [2022-07-19 17:51:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 17:51:45,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:45,876 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, 1] [2022-07-19 17:51:45,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 17:51:45,877 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:45,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1833027237, now seen corresponding path program 1 times [2022-07-19 17:51:45,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:45,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729731229] [2022-07-19 17:51:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:45,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:45,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:45,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729731229] [2022-07-19 17:51:45,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729731229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:45,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:45,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 17:51:45,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021490690] [2022-07-19 17:51:45,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:45,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 17:51:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:45,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 17:51:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 17:51:45,976 INFO L87 Difference]: Start difference. First operand 1086 states and 1748 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:46,096 INFO L93 Difference]: Finished difference Result 3176 states and 5180 transitions. [2022-07-19 17:51:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 17:51:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 67 [2022-07-19 17:51:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:46,104 INFO L225 Difference]: With dead ends: 3176 [2022-07-19 17:51:46,105 INFO L226 Difference]: Without dead ends: 2144 [2022-07-19 17:51:46,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:51:46,109 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 411 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:46,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 707 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2022-07-19 17:51:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1606. [2022-07-19 17:51:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.618068535825545) internal successors, (2597), 1605 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2597 transitions. [2022-07-19 17:51:46,180 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2597 transitions. Word has length 67 [2022-07-19 17:51:46,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:46,182 INFO L495 AbstractCegarLoop]: Abstraction has 1606 states and 2597 transitions. [2022-07-19 17:51:46,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:46,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2597 transitions. [2022-07-19 17:51:46,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 17:51:46,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:46,184 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, 1, 1] [2022-07-19 17:51:46,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 17:51:46,185 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:46,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1551869537, now seen corresponding path program 1 times [2022-07-19 17:51:46,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:46,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999000139] [2022-07-19 17:51:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:46,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:46,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:46,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999000139] [2022-07-19 17:51:46,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999000139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:46,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:46,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 17:51:46,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762989548] [2022-07-19 17:51:46,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:46,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 17:51:46,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:46,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 17:51:46,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 17:51:46,276 INFO L87 Difference]: Start difference. First operand 1606 states and 2597 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:46,402 INFO L93 Difference]: Finished difference Result 4670 states and 7604 transitions. [2022-07-19 17:51:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 17:51:46,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-19 17:51:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:46,414 INFO L225 Difference]: With dead ends: 4670 [2022-07-19 17:51:46,415 INFO L226 Difference]: Without dead ends: 3118 [2022-07-19 17:51:46,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:51:46,419 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 411 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:46,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 706 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:46,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2022-07-19 17:51:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 2350. [2022-07-19 17:51:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 1.6164325244785014) internal successors, (3797), 2349 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3797 transitions. [2022-07-19 17:51:46,540 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3797 transitions. Word has length 68 [2022-07-19 17:51:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:46,541 INFO L495 AbstractCegarLoop]: Abstraction has 2350 states and 3797 transitions. [2022-07-19 17:51:46,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3797 transitions. [2022-07-19 17:51:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 17:51:46,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:46,543 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, 1, 1, 1] [2022-07-19 17:51:46,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 17:51:46,543 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:46,544 INFO L85 PathProgramCache]: Analyzing trace with hash -721508526, now seen corresponding path program 1 times [2022-07-19 17:51:46,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:46,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128430061] [2022-07-19 17:51:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:46,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:46,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:46,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128430061] [2022-07-19 17:51:46,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128430061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:46,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:46,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 17:51:46,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882538478] [2022-07-19 17:51:46,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:46,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 17:51:46,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:46,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 17:51:46,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 17:51:46,588 INFO L87 Difference]: Start difference. First operand 2350 states and 3797 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:46,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:46,761 INFO L93 Difference]: Finished difference Result 6790 states and 11032 transitions. [2022-07-19 17:51:46,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 17:51:46,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 69 [2022-07-19 17:51:46,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:46,779 INFO L225 Difference]: With dead ends: 6790 [2022-07-19 17:51:46,779 INFO L226 Difference]: Without dead ends: 4494 [2022-07-19 17:51:46,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:51:46,784 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 409 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:46,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 700 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2022-07-19 17:51:46,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 3406. [2022-07-19 17:51:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 1.6138032305433188) internal successors, (5495), 3405 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 5495 transitions. [2022-07-19 17:51:46,924 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 5495 transitions. Word has length 69 [2022-07-19 17:51:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:46,925 INFO L495 AbstractCegarLoop]: Abstraction has 3406 states and 5495 transitions. [2022-07-19 17:51:46,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 5495 transitions. [2022-07-19 17:51:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-19 17:51:46,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:46,927 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, 1, 1, 1, 1] [2022-07-19 17:51:46,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 17:51:46,927 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:46,928 INFO L85 PathProgramCache]: Analyzing trace with hash -612676452, now seen corresponding path program 1 times [2022-07-19 17:51:46,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:46,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934019221] [2022-07-19 17:51:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:46,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:46,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:46,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934019221] [2022-07-19 17:51:46,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934019221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:46,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:46,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:51:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727630362] [2022-07-19 17:51:46,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:46,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:51:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:46,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:51:46,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:51:46,963 INFO L87 Difference]: Start difference. First operand 3406 states and 5495 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:47,121 INFO L93 Difference]: Finished difference Result 7756 states and 12516 transitions. [2022-07-19 17:51:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:51:47,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2022-07-19 17:51:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:47,141 INFO L225 Difference]: With dead ends: 7756 [2022-07-19 17:51:47,141 INFO L226 Difference]: Without dead ends: 5334 [2022-07-19 17:51:47,145 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 [2022-07-19 17:51:47,146 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 110 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 431 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 [2022-07-19 17:51:47,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 431 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2022-07-19 17:51:47,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 5332. [2022-07-19 17:51:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 5331 states have (on average 1.6008253610954792) internal successors, (8534), 5331 states have internal predecessors, (8534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 8534 transitions. [2022-07-19 17:51:47,371 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 8534 transitions. Word has length 70 [2022-07-19 17:51:47,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:47,371 INFO L495 AbstractCegarLoop]: Abstraction has 5332 states and 8534 transitions. [2022-07-19 17:51:47,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 8534 transitions. [2022-07-19 17:51:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-19 17:51:47,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:47,373 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, 1, 1, 1, 1] [2022-07-19 17:51:47,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 17:51:47,374 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:47,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:47,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1846404324, now seen corresponding path program 1 times [2022-07-19 17:51:47,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:47,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424546834] [2022-07-19 17:51:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:47,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:47,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:47,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424546834] [2022-07-19 17:51:47,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424546834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:47,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:47,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:51:47,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203989145] [2022-07-19 17:51:47,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:47,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:51:47,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:47,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:51:47,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:51:47,446 INFO L87 Difference]: Start difference. First operand 5332 states and 8534 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:47,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:47,686 INFO L93 Difference]: Finished difference Result 11652 states and 18696 transitions. [2022-07-19 17:51:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:51:47,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2022-07-19 17:51:47,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:47,714 INFO L225 Difference]: With dead ends: 11652 [2022-07-19 17:51:47,714 INFO L226 Difference]: Without dead ends: 7898 [2022-07-19 17:51:47,720 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 [2022-07-19 17:51:47,721 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 116 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 465 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 [2022-07-19 17:51:47,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 465 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7898 states. [2022-07-19 17:51:48,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7898 to 7896. [2022-07-19 17:51:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7896 states, 7895 states have (on average 1.592400253324889) internal successors, (12572), 7895 states have internal predecessors, (12572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7896 states to 7896 states and 12572 transitions. [2022-07-19 17:51:48,061 INFO L78 Accepts]: Start accepts. Automaton has 7896 states and 12572 transitions. Word has length 70 [2022-07-19 17:51:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:48,062 INFO L495 AbstractCegarLoop]: Abstraction has 7896 states and 12572 transitions. [2022-07-19 17:51:48,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7896 states and 12572 transitions. [2022-07-19 17:51:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-19 17:51:48,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:48,064 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, 1, 1, 1, 1] [2022-07-19 17:51:48,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 17:51:48,065 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash -827061860, now seen corresponding path program 1 times [2022-07-19 17:51:48,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:48,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921795205] [2022-07-19 17:51:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:48,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:48,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921795205] [2022-07-19 17:51:48,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921795205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:48,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:48,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:51:48,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115306297] [2022-07-19 17:51:48,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:48,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:51:48,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:48,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:51:48,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:51:48,106 INFO L87 Difference]: Start difference. First operand 7896 states and 12572 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:48,535 INFO L93 Difference]: Finished difference Result 17505 states and 28102 transitions. [2022-07-19 17:51:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:51:48,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2022-07-19 17:51:48,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:48,561 INFO L225 Difference]: With dead ends: 17505 [2022-07-19 17:51:48,561 INFO L226 Difference]: Without dead ends: 11757 [2022-07-19 17:51:48,569 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 [2022-07-19 17:51:48,569 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 122 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 491 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 [2022-07-19 17:51:48,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 491 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11757 states. [2022-07-19 17:51:48,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11757 to 11755. [2022-07-19 17:51:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11755 states, 11754 states have (on average 1.5875446656457377) internal successors, (18660), 11754 states have internal predecessors, (18660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11755 states to 11755 states and 18660 transitions. [2022-07-19 17:51:49,013 INFO L78 Accepts]: Start accepts. Automaton has 11755 states and 18660 transitions. Word has length 70 [2022-07-19 17:51:49,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:49,014 INFO L495 AbstractCegarLoop]: Abstraction has 11755 states and 18660 transitions. [2022-07-19 17:51:49,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:49,014 INFO L276 IsEmpty]: Start isEmpty. Operand 11755 states and 18660 transitions. [2022-07-19 17:51:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 17:51:49,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:49,015 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, 1, 1, 1, 1, 1] [2022-07-19 17:51:49,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 17:51:49,015 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash 287488266, now seen corresponding path program 1 times [2022-07-19 17:51:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:49,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580809802] [2022-07-19 17:51:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:49,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:49,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:49,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580809802] [2022-07-19 17:51:49,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580809802] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:49,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:49,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:51:49,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338360355] [2022-07-19 17:51:49,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:49,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:51:49,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:49,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:51:49,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:51:49,110 INFO L87 Difference]: Start difference. First operand 11755 states and 18660 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:49,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:49,593 INFO L93 Difference]: Finished difference Result 23432 states and 37211 transitions. [2022-07-19 17:51:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:51:49,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 71 [2022-07-19 17:51:49,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:49,618 INFO L225 Difference]: With dead ends: 23432 [2022-07-19 17:51:49,618 INFO L226 Difference]: Without dead ends: 11757 [2022-07-19 17:51:49,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:51:49,635 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 189 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:49,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 754 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11757 states. [2022-07-19 17:51:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11757 to 11755. [2022-07-19 17:51:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11755 states, 11754 states have (on average 1.576909988089161) internal successors, (18535), 11754 states have internal predecessors, (18535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11755 states to 11755 states and 18535 transitions. [2022-07-19 17:51:50,214 INFO L78 Accepts]: Start accepts. Automaton has 11755 states and 18535 transitions. Word has length 71 [2022-07-19 17:51:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:50,214 INFO L495 AbstractCegarLoop]: Abstraction has 11755 states and 18535 transitions. [2022-07-19 17:51:50,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 11755 states and 18535 transitions. [2022-07-19 17:51:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-19 17:51:50,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:50,216 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:51:50,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 17:51:50,217 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:50,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2101127620, now seen corresponding path program 1 times [2022-07-19 17:51:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:50,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882893720] [2022-07-19 17:51:50,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:50,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:50,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:50,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882893720] [2022-07-19 17:51:50,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882893720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:50,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:50,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:51:50,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070695019] [2022-07-19 17:51:50,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:50,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:51:50,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:50,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:51:50,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:51:50,329 INFO L87 Difference]: Start difference. First operand 11755 states and 18535 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:51,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:51,116 INFO L93 Difference]: Finished difference Result 33676 states and 53245 transitions. [2022-07-19 17:51:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:51:51,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 74 [2022-07-19 17:51:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:51,163 INFO L225 Difference]: With dead ends: 33676 [2022-07-19 17:51:51,164 INFO L226 Difference]: Without dead ends: 22001 [2022-07-19 17:51:51,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:51:51,188 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 297 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:51,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 577 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22001 states. [2022-07-19 17:51:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22001 to 21999. [2022-07-19 17:51:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21999 states, 21998 states have (on average 1.565142285662333) internal successors, (34430), 21998 states have internal predecessors, (34430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21999 states to 21999 states and 34430 transitions. [2022-07-19 17:51:51,934 INFO L78 Accepts]: Start accepts. Automaton has 21999 states and 34430 transitions. Word has length 74 [2022-07-19 17:51:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:51,935 INFO L495 AbstractCegarLoop]: Abstraction has 21999 states and 34430 transitions. [2022-07-19 17:51:51,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 21999 states and 34430 transitions. [2022-07-19 17:51:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-19 17:51:51,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:51,936 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:51:51,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 17:51:51,936 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:51,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:51,937 INFO L85 PathProgramCache]: Analyzing trace with hash 281871155, now seen corresponding path program 1 times [2022-07-19 17:51:51,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:51,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202006692] [2022-07-19 17:51:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:51,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:51:51,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:51,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202006692] [2022-07-19 17:51:51,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202006692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:51,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:51,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:51:51,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121737971] [2022-07-19 17:51:51,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:51,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:51:51,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:51:51,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:51:51,997 INFO L87 Difference]: Start difference. First operand 21999 states and 34430 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:53,183 INFO L93 Difference]: Finished difference Result 42906 states and 66447 transitions. [2022-07-19 17:51:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:51:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 75 [2022-07-19 17:51:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:53,279 INFO L225 Difference]: With dead ends: 42906 [2022-07-19 17:51:53,280 INFO L226 Difference]: Without dead ends: 42904 [2022-07-19 17:51:53,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:51:53,293 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 368 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:53,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 926 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:53,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42904 states. [2022-07-19 17:51:54,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42904 to 23085. [2022-07-19 17:51:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23085 states, 23084 states have (on average 1.5381649627447582) internal successors, (35507), 23084 states have internal predecessors, (35507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23085 states to 23085 states and 35507 transitions. [2022-07-19 17:51:54,444 INFO L78 Accepts]: Start accepts. Automaton has 23085 states and 35507 transitions. Word has length 75 [2022-07-19 17:51:54,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:54,444 INFO L495 AbstractCegarLoop]: Abstraction has 23085 states and 35507 transitions. [2022-07-19 17:51:54,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 23085 states and 35507 transitions. [2022-07-19 17:51:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 17:51:54,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:54,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 17:51:54,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 17:51:54,447 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:54,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1623964746, now seen corresponding path program 1 times [2022-07-19 17:51:54,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:54,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585994550] [2022-07-19 17:51:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:54,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 17:51:54,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:54,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585994550] [2022-07-19 17:51:54,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585994550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:54,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:54,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:51:54,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962122702] [2022-07-19 17:51:54,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:54,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:51:54,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:54,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:51:54,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:51:54,504 INFO L87 Difference]: Start difference. First operand 23085 states and 35507 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 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) [2022-07-19 17:51:56,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:56,181 INFO L93 Difference]: Finished difference Result 56425 states and 87035 transitions. [2022-07-19 17:51:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:51:56,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 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 103 [2022-07-19 17:51:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:56,268 INFO L225 Difference]: With dead ends: 56425 [2022-07-19 17:51:56,268 INFO L226 Difference]: Without dead ends: 45483 [2022-07-19 17:51:56,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:51:56,296 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 521 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:56,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 974 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45483 states. [2022-07-19 17:51:57,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45483 to 35477. [2022-07-19 17:51:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35477 states, 35476 states have (on average 1.5366163039801557) internal successors, (54513), 35476 states have internal predecessors, (54513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35477 states to 35477 states and 54513 transitions. [2022-07-19 17:51:57,697 INFO L78 Accepts]: Start accepts. Automaton has 35477 states and 54513 transitions. Word has length 103 [2022-07-19 17:51:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:51:57,698 INFO L495 AbstractCegarLoop]: Abstraction has 35477 states and 54513 transitions. [2022-07-19 17:51:57,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 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) [2022-07-19 17:51:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 35477 states and 54513 transitions. [2022-07-19 17:51:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 17:51:57,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:51:57,700 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 17:51:57,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 17:51:57,701 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:51:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:51:57,701 INFO L85 PathProgramCache]: Analyzing trace with hash 390236874, now seen corresponding path program 1 times [2022-07-19 17:51:57,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:51:57,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776127834] [2022-07-19 17:51:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:51:57,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:51:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:51:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 17:51:57,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:51:57,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776127834] [2022-07-19 17:51:57,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776127834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:51:57,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:51:57,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:51:57,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075581879] [2022-07-19 17:51:57,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:51:57,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:51:57,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:51:57,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:51:57,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:51:57,758 INFO L87 Difference]: Start difference. First operand 35477 states and 54513 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:51:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:51:59,507 INFO L93 Difference]: Finished difference Result 60801 states and 93795 transitions. [2022-07-19 17:51:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:51:59,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 103 [2022-07-19 17:51:59,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:51:59,602 INFO L225 Difference]: With dead ends: 60801 [2022-07-19 17:51:59,603 INFO L226 Difference]: Without dead ends: 49859 [2022-07-19 17:51:59,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:51:59,634 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 524 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:51:59,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 967 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:51:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49859 states. [2022-07-19 17:52:01,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49859 to 48061. [2022-07-19 17:52:01,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48061 states, 48060 states have (on average 1.5370994590095715) internal successors, (73873), 48060 states have internal predecessors, (73873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48061 states to 48061 states and 73873 transitions. [2022-07-19 17:52:01,770 INFO L78 Accepts]: Start accepts. Automaton has 48061 states and 73873 transitions. Word has length 103 [2022-07-19 17:52:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:01,770 INFO L495 AbstractCegarLoop]: Abstraction has 48061 states and 73873 transitions. [2022-07-19 17:52:01,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 48061 states and 73873 transitions. [2022-07-19 17:52:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 17:52:01,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:01,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 17:52:01,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 17:52:01,773 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:01,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1409579338, now seen corresponding path program 1 times [2022-07-19 17:52:01,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:01,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036226284] [2022-07-19 17:52:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:01,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:52:01,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:01,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036226284] [2022-07-19 17:52:01,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036226284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:01,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:01,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:52:01,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441112184] [2022-07-19 17:52:01,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:01,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:52:01,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:52:01,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:52:01,829 INFO L87 Difference]: Start difference. First operand 48061 states and 73873 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:03,865 INFO L93 Difference]: Finished difference Result 68229 states and 105413 transitions. [2022-07-19 17:52:03,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:52:03,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 103 [2022-07-19 17:52:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:03,948 INFO L225 Difference]: With dead ends: 68229 [2022-07-19 17:52:03,948 INFO L226 Difference]: Without dead ends: 57027 [2022-07-19 17:52:03,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:52:03,963 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 518 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:03,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1002 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57027 states. [2022-07-19 17:52:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57027 to 55229. [2022-07-19 17:52:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55229 states, 55228 states have (on average 1.5394546244658507) internal successors, (85021), 55228 states have internal predecessors, (85021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55229 states to 55229 states and 85021 transitions. [2022-07-19 17:52:06,208 INFO L78 Accepts]: Start accepts. Automaton has 55229 states and 85021 transitions. Word has length 103 [2022-07-19 17:52:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:06,208 INFO L495 AbstractCegarLoop]: Abstraction has 55229 states and 85021 transitions. [2022-07-19 17:52:06,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 55229 states and 85021 transitions. [2022-07-19 17:52:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 17:52:06,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:06,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 17:52:06,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 17:52:06,214 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:06,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1175546085, now seen corresponding path program 1 times [2022-07-19 17:52:06,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:06,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882831692] [2022-07-19 17:52:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:06,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:52:06,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:06,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882831692] [2022-07-19 17:52:06,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882831692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:06,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:06,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 17:52:06,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641176138] [2022-07-19 17:52:06,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:06,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 17:52:06,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 17:52:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 17:52:06,272 INFO L87 Difference]: Start difference. First operand 55229 states and 85021 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:08,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:08,801 INFO L93 Difference]: Finished difference Result 90092 states and 139360 transitions. [2022-07-19 17:52:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 17:52:08,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 104 [2022-07-19 17:52:08,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:08,921 INFO L225 Difference]: With dead ends: 90092 [2022-07-19 17:52:08,922 INFO L226 Difference]: Without dead ends: 71722 [2022-07-19 17:52:08,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 17:52:08,955 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 229 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:08,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 671 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71722 states. [2022-07-19 17:52:11,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71722 to 69926. [2022-07-19 17:52:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69926 states, 69925 states have (on average 1.5396639256346085) internal successors, (107661), 69925 states have internal predecessors, (107661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69926 states to 69926 states and 107661 transitions. [2022-07-19 17:52:11,882 INFO L78 Accepts]: Start accepts. Automaton has 69926 states and 107661 transitions. Word has length 104 [2022-07-19 17:52:11,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:52:11,883 INFO L495 AbstractCegarLoop]: Abstraction has 69926 states and 107661 transitions. [2022-07-19 17:52:11,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 69926 states and 107661 transitions. [2022-07-19 17:52:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 17:52:11,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:52:11,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 17:52:11,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 17:52:11,885 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:52:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:52:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash -752844259, now seen corresponding path program 1 times [2022-07-19 17:52:11,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:52:11,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172968952] [2022-07-19 17:52:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:52:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:52:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:52:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:52:11,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:52:11,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172968952] [2022-07-19 17:52:11,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172968952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:52:11,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:52:11,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 17:52:11,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563748630] [2022-07-19 17:52:11,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:52:11,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:52:11,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:52:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:52:11,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 17:52:11,925 INFO L87 Difference]: Start difference. First operand 69926 states and 107661 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:52:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:52:16,039 INFO L93 Difference]: Finished difference Result 151130 states and 233412 transitions. [2022-07-19 17:52:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:52:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 104 [2022-07-19 17:52:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:52:16,225 INFO L225 Difference]: With dead ends: 151130 [2022-07-19 17:52:16,225 INFO L226 Difference]: Without dead ends: 118200 [2022-07-19 17:52:16,274 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 [2022-07-19 17:52:16,276 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 99 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:52:16,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 388 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:52:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118200 states.