./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.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 d4091e99c6c703f11d6d31e8eaec6c84e6dd277464e5b390742bbd7adf0ea708 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 16:05:12,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 16:05:12,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 16:05:12,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 16:05:12,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 16:05:12,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 16:05:12,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 16:05:12,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 16:05:12,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 16:05:12,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 16:05:12,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 16:05:12,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 16:05:12,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 16:05:12,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 16:05:12,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 16:05:12,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 16:05:12,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 16:05:12,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 16:05:12,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 16:05:12,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 16:05:12,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 16:05:12,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 16:05:13,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 16:05:13,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 16:05:13,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 16:05:13,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 16:05:13,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 16:05:13,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 16:05:13,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 16:05:13,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 16:05:13,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 16:05:13,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 16:05:13,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 16:05:13,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 16:05:13,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 16:05:13,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 16:05:13,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 16:05:13,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 16:05:13,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 16:05:13,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 16:05:13,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 16:05:13,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 16:05:13,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 16:05:13,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 16:05:13,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 16:05:13,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 16:05:13,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 16:05:13,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 16:05:13,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 16:05:13,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 16:05:13,052 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 16:05:13,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 16:05:13,053 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 16:05:13,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 16:05:13,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 16:05:13,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 16:05:13,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 16:05:13,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 16:05:13,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 16:05:13,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 16:05:13,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 16:05:13,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 16:05:13,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 16:05:13,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 16:05:13,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 16:05:13,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 16:05:13,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 16:05:13,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 16:05:13,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 16:05:13,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 16:05:13,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 16:05:13,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 16:05:13,056 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 16:05:13,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 16:05:13,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 16:05:13,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 16:05:13,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4091e99c6c703f11d6d31e8eaec6c84e6dd277464e5b390742bbd7adf0ea708 [2021-12-17 16:05:13,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 16:05:13,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 16:05:13,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 16:05:13,263 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 16:05:13,264 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 16:05:13,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-12-17 16:05:13,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c095daa4a/b27f331a4a1f4247b2a30fbbc0636595/FLAGf32346858 [2021-12-17 16:05:13,709 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 16:05:13,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-12-17 16:05:13,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c095daa4a/b27f331a4a1f4247b2a30fbbc0636595/FLAGf32346858 [2021-12-17 16:05:14,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c095daa4a/b27f331a4a1f4247b2a30fbbc0636595 [2021-12-17 16:05:14,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 16:05:14,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 16:05:14,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 16:05:14,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 16:05:14,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 16:05:14,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38f28b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14, skipping insertion in model container [2021-12-17 16:05:14,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 16:05:14,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 16:05:14,341 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-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14145,14158] [2021-12-17 16:05:14,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 16:05:14,392 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 16:05:14,475 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-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14145,14158] [2021-12-17 16:05:14,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 16:05:14,513 INFO L208 MainTranslator]: Completed translation [2021-12-17 16:05:14,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14 WrapperNode [2021-12-17 16:05:14,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 16:05:14,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 16:05:14,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 16:05:14,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 16:05:14,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,575 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1157 [2021-12-17 16:05:14,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 16:05:14,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 16:05:14,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 16:05:14,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 16:05:14,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 16:05:14,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 16:05:14,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 16:05:14,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 16:05:14,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14" (1/1) ... [2021-12-17 16:05:14,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 16:05:14,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 16:05:14,665 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) [2021-12-17 16:05:14,685 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 [2021-12-17 16:05:14,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 16:05:14,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 16:05:14,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 16:05:14,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 16:05:14,773 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 16:05:14,775 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 16:05:15,447 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 16:05:15,454 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 16:05:15,454 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 16:05:15,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:05:15 BoogieIcfgContainer [2021-12-17 16:05:15,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 16:05:15,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 16:05:15,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 16:05:15,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 16:05:15,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:05:14" (1/3) ... [2021-12-17 16:05:15,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9ebf4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:05:15, skipping insertion in model container [2021-12-17 16:05:15,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:05:14" (2/3) ... [2021-12-17 16:05:15,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9ebf4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:05:15, skipping insertion in model container [2021-12-17 16:05:15,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:05:15" (3/3) ... [2021-12-17 16:05:15,462 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-12-17 16:05:15,466 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 16:05:15,466 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 16:05:15,514 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 16:05:15,519 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 16:05:15,520 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 16:05:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 294 states, 292 states have (on average 1.7945205479452055) internal successors, (524), 293 states have internal predecessors, (524), 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) [2021-12-17 16:05:15,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 16:05:15,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:15,550 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:15,550 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:15,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:15,556 INFO L85 PathProgramCache]: Analyzing trace with hash -37487086, now seen corresponding path program 1 times [2021-12-17 16:05:15,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:15,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041568391] [2021-12-17 16:05:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:15,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:15,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:15,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041568391] [2021-12-17 16:05:15,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041568391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:15,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:15,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:05:15,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330777382] [2021-12-17 16:05:15,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:15,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:05:15,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:15,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:05:15,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:05:15,916 INFO L87 Difference]: Start difference. First operand has 294 states, 292 states have (on average 1.7945205479452055) internal successors, (524), 293 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-12-17 16:05:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:16,085 INFO L93 Difference]: Finished difference Result 590 states and 1044 transitions. [2021-12-17 16:05:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:05:16,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 141 [2021-12-17 16:05:16,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:16,098 INFO L225 Difference]: With dead ends: 590 [2021-12-17 16:05:16,099 INFO L226 Difference]: Without dead ends: 473 [2021-12-17 16:05:16,101 INFO L932 BasicCegarLoop]: 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 [2021-12-17 16:05:16,103 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 347 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:16,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 873 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:05:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-12-17 16:05:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2021-12-17 16:05:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.4936170212765958) internal successors, (702), 470 states have internal predecessors, (702), 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) [2021-12-17 16:05:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 702 transitions. [2021-12-17 16:05:16,176 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 702 transitions. Word has length 141 [2021-12-17 16:05:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:16,178 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 702 transitions. [2021-12-17 16:05:16,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-12-17 16:05:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 702 transitions. [2021-12-17 16:05:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 16:05:16,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:16,188 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:16,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 16:05:16,189 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:16,190 INFO L85 PathProgramCache]: Analyzing trace with hash -106858572, now seen corresponding path program 1 times [2021-12-17 16:05:16,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:16,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122517609] [2021-12-17 16:05:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:16,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:16,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:16,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122517609] [2021-12-17 16:05:16,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122517609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:16,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:16,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:05:16,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107180058] [2021-12-17 16:05:16,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:16,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:05:16,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:16,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:05:16,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:05:16,380 INFO L87 Difference]: Start difference. First operand 471 states and 702 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2021-12-17 16:05:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:16,458 INFO L93 Difference]: Finished difference Result 1380 states and 2051 transitions. [2021-12-17 16:05:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:05:16,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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 141 [2021-12-17 16:05:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:16,463 INFO L225 Difference]: With dead ends: 1380 [2021-12-17 16:05:16,463 INFO L226 Difference]: Without dead ends: 918 [2021-12-17 16:05:16,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:16,468 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 853 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:16,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 1121 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:16,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-12-17 16:05:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 916. [2021-12-17 16:05:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.4775956284153005) internal successors, (1352), 915 states have internal predecessors, (1352), 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) [2021-12-17 16:05:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1352 transitions. [2021-12-17 16:05:16,515 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1352 transitions. Word has length 141 [2021-12-17 16:05:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:16,515 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1352 transitions. [2021-12-17 16:05:16,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2021-12-17 16:05:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1352 transitions. [2021-12-17 16:05:16,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 16:05:16,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:16,519 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:16,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 16:05:16,519 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:16,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1746789024, now seen corresponding path program 1 times [2021-12-17 16:05:16,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:16,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636369194] [2021-12-17 16:05:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:16,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:16,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636369194] [2021-12-17 16:05:16,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636369194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:16,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:16,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:05:16,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735967207] [2021-12-17 16:05:16,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:16,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:05:16,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:16,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:05:16,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:05:16,558 INFO L87 Difference]: Start difference. First operand 916 states and 1352 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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) [2021-12-17 16:05:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:16,615 INFO L93 Difference]: Finished difference Result 2710 states and 3994 transitions. [2021-12-17 16:05:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:05:16,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 142 [2021-12-17 16:05:16,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:16,621 INFO L225 Difference]: With dead ends: 2710 [2021-12-17 16:05:16,621 INFO L226 Difference]: Without dead ends: 1822 [2021-12-17 16:05:16,623 INFO L932 BasicCegarLoop]: 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 [2021-12-17 16:05:16,628 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 415 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:16,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1255 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-12-17 16:05:16,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 918. [2021-12-17 16:05:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 1.4765539803707743) internal successors, (1354), 917 states have internal predecessors, (1354), 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) [2021-12-17 16:05:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1354 transitions. [2021-12-17 16:05:16,673 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1354 transitions. Word has length 142 [2021-12-17 16:05:16,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:16,673 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1354 transitions. [2021-12-17 16:05:16,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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) [2021-12-17 16:05:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1354 transitions. [2021-12-17 16:05:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 16:05:16,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:16,676 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:16,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 16:05:16,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:16,677 INFO L85 PathProgramCache]: Analyzing trace with hash 463094692, now seen corresponding path program 1 times [2021-12-17 16:05:16,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:16,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329195449] [2021-12-17 16:05:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:16,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:16,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:16,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329195449] [2021-12-17 16:05:16,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329195449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:16,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:16,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:05:16,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198332533] [2021-12-17 16:05:16,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:16,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:05:16,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:16,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:05:16,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:05:16,792 INFO L87 Difference]: Start difference. First operand 918 states and 1354 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2021-12-17 16:05:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:16,867 INFO L93 Difference]: Finished difference Result 2514 states and 3723 transitions. [2021-12-17 16:05:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:05:16,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 143 [2021-12-17 16:05:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:16,876 INFO L225 Difference]: With dead ends: 2514 [2021-12-17 16:05:16,876 INFO L226 Difference]: Without dead ends: 1774 [2021-12-17 16:05:16,877 INFO L932 BasicCegarLoop]: 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 [2021-12-17 16:05:16,883 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 354 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:16,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1153 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2021-12-17 16:05:16,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1772. [2021-12-17 16:05:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 1.460756634669678) internal successors, (2587), 1771 states have internal predecessors, (2587), 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) [2021-12-17 16:05:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2587 transitions. [2021-12-17 16:05:16,948 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2587 transitions. Word has length 143 [2021-12-17 16:05:16,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:16,949 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 2587 transitions. [2021-12-17 16:05:16,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2021-12-17 16:05:16,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2587 transitions. [2021-12-17 16:05:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 16:05:16,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:16,951 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:16,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 16:05:16,952 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:16,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2076257255, now seen corresponding path program 1 times [2021-12-17 16:05:16,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:16,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866497235] [2021-12-17 16:05:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:16,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:17,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:17,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866497235] [2021-12-17 16:05:17,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866497235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:17,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:17,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 16:05:17,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380129360] [2021-12-17 16:05:17,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:17,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:05:17,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:05:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:17,129 INFO L87 Difference]: Start difference. First operand 1772 states and 2587 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 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) [2021-12-17 16:05:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:17,266 INFO L93 Difference]: Finished difference Result 5046 states and 7368 transitions. [2021-12-17 16:05:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:05:17,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 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 143 [2021-12-17 16:05:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:17,278 INFO L225 Difference]: With dead ends: 5046 [2021-12-17 16:05:17,278 INFO L226 Difference]: Without dead ends: 3288 [2021-12-17 16:05:17,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:17,282 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 1256 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1256 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:17,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1256 Valid, 1114 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-12-17 16:05:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 3286. [2021-12-17 16:05:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 1.4487062404870623) internal successors, (4759), 3285 states have internal predecessors, (4759), 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) [2021-12-17 16:05:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4759 transitions. [2021-12-17 16:05:17,413 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4759 transitions. Word has length 143 [2021-12-17 16:05:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:17,415 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4759 transitions. [2021-12-17 16:05:17,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 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) [2021-12-17 16:05:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4759 transitions. [2021-12-17 16:05:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 16:05:17,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:17,422 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:17,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 16:05:17,422 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:17,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:17,423 INFO L85 PathProgramCache]: Analyzing trace with hash 407122579, now seen corresponding path program 1 times [2021-12-17 16:05:17,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:17,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733241354] [2021-12-17 16:05:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:17,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:17,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:17,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733241354] [2021-12-17 16:05:17,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733241354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:17,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:17,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:05:17,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743391973] [2021-12-17 16:05:17,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:17,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:05:17,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:05:17,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:05:17,521 INFO L87 Difference]: Start difference. First operand 3286 states and 4759 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2021-12-17 16:05:17,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:17,743 INFO L93 Difference]: Finished difference Result 9553 states and 13784 transitions. [2021-12-17 16:05:17,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:05:17,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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 143 [2021-12-17 16:05:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:17,763 INFO L225 Difference]: With dead ends: 9553 [2021-12-17 16:05:17,763 INFO L226 Difference]: Without dead ends: 6323 [2021-12-17 16:05:17,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:17,771 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 835 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:17,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 1084 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2021-12-17 16:05:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6321. [2021-12-17 16:05:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 6320 states have (on average 1.428006329113924) internal successors, (9025), 6320 states have internal predecessors, (9025), 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) [2021-12-17 16:05:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 9025 transitions. [2021-12-17 16:05:18,030 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 9025 transitions. Word has length 143 [2021-12-17 16:05:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:18,031 INFO L470 AbstractCegarLoop]: Abstraction has 6321 states and 9025 transitions. [2021-12-17 16:05:18,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2021-12-17 16:05:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 9025 transitions. [2021-12-17 16:05:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-17 16:05:18,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:18,037 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:18,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 16:05:18,038 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:18,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:18,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1881733921, now seen corresponding path program 1 times [2021-12-17 16:05:18,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:18,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907457480] [2021-12-17 16:05:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:18,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:18,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:18,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907457480] [2021-12-17 16:05:18,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907457480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:18,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:18,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:05:18,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315894193] [2021-12-17 16:05:18,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:18,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:05:18,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:18,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:05:18,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:05:18,068 INFO L87 Difference]: Start difference. First operand 6321 states and 9025 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-12-17 16:05:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:18,401 INFO L93 Difference]: Finished difference Result 18811 states and 26842 transitions. [2021-12-17 16:05:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:05:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 144 [2021-12-17 16:05:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:18,452 INFO L225 Difference]: With dead ends: 18811 [2021-12-17 16:05:18,452 INFO L226 Difference]: Without dead ends: 12581 [2021-12-17 16:05:18,462 INFO L932 BasicCegarLoop]: 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 [2021-12-17 16:05:18,463 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 401 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:18,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 915 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12581 states. [2021-12-17 16:05:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12581 to 6331. [2021-12-17 16:05:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6331 states, 6330 states have (on average 1.4273301737756714) internal successors, (9035), 6330 states have internal predecessors, (9035), 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) [2021-12-17 16:05:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 9035 transitions. [2021-12-17 16:05:18,790 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 9035 transitions. Word has length 144 [2021-12-17 16:05:18,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:18,790 INFO L470 AbstractCegarLoop]: Abstraction has 6331 states and 9035 transitions. [2021-12-17 16:05:18,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-12-17 16:05:18,791 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 9035 transitions. [2021-12-17 16:05:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 16:05:18,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:18,798 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:18,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 16:05:18,799 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:18,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1026353394, now seen corresponding path program 1 times [2021-12-17 16:05:18,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:18,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019103194] [2021-12-17 16:05:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:18,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:18,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019103194] [2021-12-17 16:05:18,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019103194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:18,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:18,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:05:18,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17844239] [2021-12-17 16:05:18,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:18,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:05:18,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:18,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:05:18,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:05:18,878 INFO L87 Difference]: Start difference. First operand 6331 states and 9035 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2021-12-17 16:05:19,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:19,250 INFO L93 Difference]: Finished difference Result 17179 states and 24404 transitions. [2021-12-17 16:05:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:05:19,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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 145 [2021-12-17 16:05:19,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:19,267 INFO L225 Difference]: With dead ends: 17179 [2021-12-17 16:05:19,267 INFO L226 Difference]: Without dead ends: 10949 [2021-12-17 16:05:19,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:19,275 INFO L933 BasicCegarLoop]: 691 mSDtfsCounter, 831 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:19,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 1071 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:05:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10949 states. [2021-12-17 16:05:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10949 to 10947. [2021-12-17 16:05:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10947 states, 10946 states have (on average 1.4007856751324685) internal successors, (15333), 10946 states have internal predecessors, (15333), 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) [2021-12-17 16:05:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10947 states to 10947 states and 15333 transitions. [2021-12-17 16:05:19,721 INFO L78 Accepts]: Start accepts. Automaton has 10947 states and 15333 transitions. Word has length 145 [2021-12-17 16:05:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:19,722 INFO L470 AbstractCegarLoop]: Abstraction has 10947 states and 15333 transitions. [2021-12-17 16:05:19,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2021-12-17 16:05:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 10947 states and 15333 transitions. [2021-12-17 16:05:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 16:05:19,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:19,736 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:19,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 16:05:19,738 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash 972165086, now seen corresponding path program 1 times [2021-12-17 16:05:19,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:19,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90734324] [2021-12-17 16:05:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:19,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:19,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:19,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90734324] [2021-12-17 16:05:19,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90734324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:19,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:19,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:05:19,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062460358] [2021-12-17 16:05:19,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:19,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:05:19,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:05:19,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:05:19,777 INFO L87 Difference]: Start difference. First operand 10947 states and 15333 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-17 16:05:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:20,431 INFO L93 Difference]: Finished difference Result 31689 states and 44543 transitions. [2021-12-17 16:05:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:05:20,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 146 [2021-12-17 16:05:20,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:20,470 INFO L225 Difference]: With dead ends: 31689 [2021-12-17 16:05:20,470 INFO L226 Difference]: Without dead ends: 21617 [2021-12-17 16:05:20,487 INFO L932 BasicCegarLoop]: 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 [2021-12-17 16:05:20,489 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 387 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:20,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1227 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21617 states. [2021-12-17 16:05:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21617 to 10967. [2021-12-17 16:05:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10967 states, 10966 states have (on average 1.4000547145723143) internal successors, (15353), 10966 states have internal predecessors, (15353), 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) [2021-12-17 16:05:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 15353 transitions. [2021-12-17 16:05:21,009 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 15353 transitions. Word has length 146 [2021-12-17 16:05:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:21,009 INFO L470 AbstractCegarLoop]: Abstraction has 10967 states and 15353 transitions. [2021-12-17 16:05:21,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-17 16:05:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 15353 transitions. [2021-12-17 16:05:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 16:05:21,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:21,022 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:21,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 16:05:21,022 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1548655907, now seen corresponding path program 1 times [2021-12-17 16:05:21,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:21,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963742707] [2021-12-17 16:05:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:21,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:21,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:21,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963742707] [2021-12-17 16:05:21,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963742707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:21,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:21,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 16:05:21,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736768756] [2021-12-17 16:05:21,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:21,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:05:21,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:21,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:05:21,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:21,126 INFO L87 Difference]: Start difference. First operand 10967 states and 15353 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 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) [2021-12-17 16:05:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:21,596 INFO L93 Difference]: Finished difference Result 22531 states and 31363 transitions. [2021-12-17 16:05:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:05:21,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 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 147 [2021-12-17 16:05:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:21,614 INFO L225 Difference]: With dead ends: 22531 [2021-12-17 16:05:21,617 INFO L226 Difference]: Without dead ends: 11789 [2021-12-17 16:05:21,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:21,632 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 1231 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:21,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1231 Valid, 1076 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11789 states. [2021-12-17 16:05:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11789 to 11449. [2021-12-17 16:05:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11449 states, 11448 states have (on average 1.3874912648497555) internal successors, (15884), 11448 states have internal predecessors, (15884), 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) [2021-12-17 16:05:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11449 states to 11449 states and 15884 transitions. [2021-12-17 16:05:22,121 INFO L78 Accepts]: Start accepts. Automaton has 11449 states and 15884 transitions. Word has length 147 [2021-12-17 16:05:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:22,121 INFO L470 AbstractCegarLoop]: Abstraction has 11449 states and 15884 transitions. [2021-12-17 16:05:22,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 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) [2021-12-17 16:05:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 11449 states and 15884 transitions. [2021-12-17 16:05:22,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 16:05:22,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:22,135 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:22,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 16:05:22,135 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1691329839, now seen corresponding path program 1 times [2021-12-17 16:05:22,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:22,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285086959] [2021-12-17 16:05:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:22,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:22,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:22,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285086959] [2021-12-17 16:05:22,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285086959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:22,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:22,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:05:22,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527994160] [2021-12-17 16:05:22,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:22,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:05:22,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:05:22,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:05:22,211 INFO L87 Difference]: Start difference. First operand 11449 states and 15884 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 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) [2021-12-17 16:05:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:22,537 INFO L93 Difference]: Finished difference Result 18605 states and 25810 transitions. [2021-12-17 16:05:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:05:22,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 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 147 [2021-12-17 16:05:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:22,551 INFO L225 Difference]: With dead ends: 18605 [2021-12-17 16:05:22,552 INFO L226 Difference]: Without dead ends: 7328 [2021-12-17 16:05:22,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:22,568 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 65 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:22,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1306 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7328 states. [2021-12-17 16:05:22,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7328 to 7328. [2021-12-17 16:05:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7328 states, 7327 states have (on average 1.3816022928893135) internal successors, (10123), 7327 states have internal predecessors, (10123), 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) [2021-12-17 16:05:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7328 states to 7328 states and 10123 transitions. [2021-12-17 16:05:22,903 INFO L78 Accepts]: Start accepts. Automaton has 7328 states and 10123 transitions. Word has length 147 [2021-12-17 16:05:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:22,903 INFO L470 AbstractCegarLoop]: Abstraction has 7328 states and 10123 transitions. [2021-12-17 16:05:22,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 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) [2021-12-17 16:05:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 7328 states and 10123 transitions. [2021-12-17 16:05:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-17 16:05:22,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:22,914 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:22,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 16:05:22,914 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:22,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash 477794436, now seen corresponding path program 1 times [2021-12-17 16:05:22,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:22,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235263622] [2021-12-17 16:05:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:22,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:22,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:22,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235263622] [2021-12-17 16:05:22,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235263622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:22,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:22,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:05:22,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342937561] [2021-12-17 16:05:22,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:22,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:05:22,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:22,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:05:22,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:05:22,955 INFO L87 Difference]: Start difference. First operand 7328 states and 10123 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-12-17 16:05:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:23,457 INFO L93 Difference]: Finished difference Result 19761 states and 27537 transitions. [2021-12-17 16:05:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:05:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 152 [2021-12-17 16:05:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:23,483 INFO L225 Difference]: With dead ends: 19761 [2021-12-17 16:05:23,483 INFO L226 Difference]: Without dead ends: 13779 [2021-12-17 16:05:23,491 INFO L932 BasicCegarLoop]: 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 [2021-12-17 16:05:23,491 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 344 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:23,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1175 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:23,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13779 states. [2021-12-17 16:05:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13779 to 13777. [2021-12-17 16:05:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.367232868757259) internal successors, (18835), 13776 states have internal predecessors, (18835), 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) [2021-12-17 16:05:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 18835 transitions. [2021-12-17 16:05:23,949 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 18835 transitions. Word has length 152 [2021-12-17 16:05:23,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:23,949 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 18835 transitions. [2021-12-17 16:05:23,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-12-17 16:05:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 18835 transitions. [2021-12-17 16:05:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-17 16:05:23,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:23,962 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:23,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 16:05:23,962 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:23,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:23,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1506973983, now seen corresponding path program 1 times [2021-12-17 16:05:23,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:23,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357765924] [2021-12-17 16:05:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:23,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:24,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:24,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357765924] [2021-12-17 16:05:24,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357765924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:24,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:24,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:05:24,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423593214] [2021-12-17 16:05:24,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:24,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:05:24,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:24,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:05:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:24,013 INFO L87 Difference]: Start difference. First operand 13777 states and 18835 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-12-17 16:05:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:24,588 INFO L93 Difference]: Finished difference Result 26226 states and 36201 transitions. [2021-12-17 16:05:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:05:24,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 152 [2021-12-17 16:05:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:24,611 INFO L225 Difference]: With dead ends: 26226 [2021-12-17 16:05:24,612 INFO L226 Difference]: Without dead ends: 13777 [2021-12-17 16:05:24,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 16:05:24,626 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 1086 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:24,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 409 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:05:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13777 states. [2021-12-17 16:05:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13777 to 13777. [2021-12-17 16:05:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.3566347270615564) internal successors, (18689), 13776 states have internal predecessors, (18689), 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) [2021-12-17 16:05:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 18689 transitions. [2021-12-17 16:05:25,136 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 18689 transitions. Word has length 152 [2021-12-17 16:05:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:25,137 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 18689 transitions. [2021-12-17 16:05:25,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-12-17 16:05:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 18689 transitions. [2021-12-17 16:05:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-17 16:05:25,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:25,150 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:25,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 16:05:25,150 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:25,151 INFO L85 PathProgramCache]: Analyzing trace with hash 211573798, now seen corresponding path program 1 times [2021-12-17 16:05:25,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:25,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059929128] [2021-12-17 16:05:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:25,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:25,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:25,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059929128] [2021-12-17 16:05:25,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059929128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:25,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:25,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:05:25,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147011647] [2021-12-17 16:05:25,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:25,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:05:25,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:25,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:05:25,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:05:25,241 INFO L87 Difference]: Start difference. First operand 13777 states and 18689 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-12-17 16:05:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:26,090 INFO L93 Difference]: Finished difference Result 30332 states and 42929 transitions. [2021-12-17 16:05:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:05:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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 152 [2021-12-17 16:05:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:26,131 INFO L225 Difference]: With dead ends: 30332 [2021-12-17 16:05:26,132 INFO L226 Difference]: Without dead ends: 24358 [2021-12-17 16:05:26,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:05:26,146 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 774 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:26,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 762 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:05:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24358 states. [2021-12-17 16:05:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24358 to 24356. [2021-12-17 16:05:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24356 states, 24355 states have (on average 1.3745842742763292) internal successors, (33478), 24355 states have internal predecessors, (33478), 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) [2021-12-17 16:05:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24356 states to 24356 states and 33478 transitions. [2021-12-17 16:05:27,469 INFO L78 Accepts]: Start accepts. Automaton has 24356 states and 33478 transitions. Word has length 152 [2021-12-17 16:05:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:27,470 INFO L470 AbstractCegarLoop]: Abstraction has 24356 states and 33478 transitions. [2021-12-17 16:05:27,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-12-17 16:05:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 24356 states and 33478 transitions. [2021-12-17 16:05:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-17 16:05:27,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:27,491 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:27,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 16:05:27,491 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash 256672605, now seen corresponding path program 1 times [2021-12-17 16:05:27,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:27,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516964529] [2021-12-17 16:05:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:27,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:27,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:27,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516964529] [2021-12-17 16:05:27,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516964529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:27,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:27,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:05:27,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004051480] [2021-12-17 16:05:27,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:27,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:05:27,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:27,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:05:27,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:05:27,569 INFO L87 Difference]: Start difference. First operand 24356 states and 33478 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-12-17 16:05:28,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:28,440 INFO L93 Difference]: Finished difference Result 38417 states and 52944 transitions. [2021-12-17 16:05:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:05:28,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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 152 [2021-12-17 16:05:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:28,472 INFO L225 Difference]: With dead ends: 38417 [2021-12-17 16:05:28,473 INFO L226 Difference]: Without dead ends: 19705 [2021-12-17 16:05:28,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:28,492 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 53 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:28,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1283 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19705 states. [2021-12-17 16:05:29,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19705 to 19705. [2021-12-17 16:05:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19705 states, 19704 states have (on average 1.371751928542428) internal successors, (27029), 19704 states have internal predecessors, (27029), 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) [2021-12-17 16:05:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19705 states to 19705 states and 27029 transitions. [2021-12-17 16:05:29,401 INFO L78 Accepts]: Start accepts. Automaton has 19705 states and 27029 transitions. Word has length 152 [2021-12-17 16:05:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:29,401 INFO L470 AbstractCegarLoop]: Abstraction has 19705 states and 27029 transitions. [2021-12-17 16:05:29,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-12-17 16:05:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 19705 states and 27029 transitions. [2021-12-17 16:05:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-17 16:05:29,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:29,412 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:29,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 16:05:29,413 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1780029436, now seen corresponding path program 1 times [2021-12-17 16:05:29,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:29,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167174254] [2021-12-17 16:05:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:29,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:29,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:29,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167174254] [2021-12-17 16:05:29,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167174254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:29,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:29,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 16:05:29,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887677469] [2021-12-17 16:05:29,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:29,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 16:05:29,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:29,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 16:05:29,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 16:05:29,487 INFO L87 Difference]: Start difference. First operand 19705 states and 27029 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 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) [2021-12-17 16:05:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:31,986 INFO L93 Difference]: Finished difference Result 62587 states and 90534 transitions. [2021-12-17 16:05:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 16:05:31,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 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 155 [2021-12-17 16:05:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:32,075 INFO L225 Difference]: With dead ends: 62587 [2021-12-17 16:05:32,075 INFO L226 Difference]: Without dead ends: 45885 [2021-12-17 16:05:32,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-12-17 16:05:32,101 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 4437 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4437 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:32,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 1125 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 16:05:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45885 states. [2021-12-17 16:05:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45885 to 28647. [2021-12-17 16:05:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28647 states, 28646 states have (on average 1.4067932695664316) internal successors, (40299), 28646 states have internal predecessors, (40299), 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) [2021-12-17 16:05:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28647 states to 28647 states and 40299 transitions. [2021-12-17 16:05:33,820 INFO L78 Accepts]: Start accepts. Automaton has 28647 states and 40299 transitions. Word has length 155 [2021-12-17 16:05:33,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:33,820 INFO L470 AbstractCegarLoop]: Abstraction has 28647 states and 40299 transitions. [2021-12-17 16:05:33,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 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) [2021-12-17 16:05:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 28647 states and 40299 transitions. [2021-12-17 16:05:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-17 16:05:33,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:33,832 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:33,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 16:05:33,832 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:33,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:33,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1190617374, now seen corresponding path program 1 times [2021-12-17 16:05:33,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:33,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789741581] [2021-12-17 16:05:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:33,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:33,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:33,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789741581] [2021-12-17 16:05:33,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789741581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:33,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:33,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:05:33,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233366850] [2021-12-17 16:05:33,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:33,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:05:33,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:33,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:05:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:05:33,940 INFO L87 Difference]: Start difference. First operand 28647 states and 40299 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2021-12-17 16:05:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:35,533 INFO L93 Difference]: Finished difference Result 53288 states and 74933 transitions. [2021-12-17 16:05:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:05:35,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 155 [2021-12-17 16:05:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:35,576 INFO L225 Difference]: With dead ends: 53288 [2021-12-17 16:05:35,576 INFO L226 Difference]: Without dead ends: 24699 [2021-12-17 16:05:35,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:35,603 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 43 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:35,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1248 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24699 states. [2021-12-17 16:05:37,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24699 to 24699. [2021-12-17 16:05:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24699 states, 24698 states have (on average 1.4052554862741922) internal successors, (34707), 24698 states have internal predecessors, (34707), 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) [2021-12-17 16:05:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24699 states to 24699 states and 34707 transitions. [2021-12-17 16:05:37,383 INFO L78 Accepts]: Start accepts. Automaton has 24699 states and 34707 transitions. Word has length 155 [2021-12-17 16:05:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:37,383 INFO L470 AbstractCegarLoop]: Abstraction has 24699 states and 34707 transitions. [2021-12-17 16:05:37,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2021-12-17 16:05:37,384 INFO L276 IsEmpty]: Start isEmpty. Operand 24699 states and 34707 transitions. [2021-12-17 16:05:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-17 16:05:37,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:37,394 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:37,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 16:05:37,395 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:37,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:37,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1407593907, now seen corresponding path program 1 times [2021-12-17 16:05:37,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:37,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985480884] [2021-12-17 16:05:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:37,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:37,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:37,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985480884] [2021-12-17 16:05:37,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985480884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:37,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:37,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:05:37,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251648636] [2021-12-17 16:05:37,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:37,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:05:37,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:37,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:05:37,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:05:37,491 INFO L87 Difference]: Start difference. First operand 24699 states and 34707 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 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) [2021-12-17 16:05:38,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:38,720 INFO L93 Difference]: Finished difference Result 46270 states and 64938 transitions. [2021-12-17 16:05:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:05:38,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 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 161 [2021-12-17 16:05:38,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:38,751 INFO L225 Difference]: With dead ends: 46270 [2021-12-17 16:05:38,751 INFO L226 Difference]: Without dead ends: 21835 [2021-12-17 16:05:38,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:38,774 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 862 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:38,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 946 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:38,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21835 states. [2021-12-17 16:05:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21835 to 21763. [2021-12-17 16:05:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21763 states, 21762 states have (on average 1.3987684955426891) internal successors, (30440), 21762 states have internal predecessors, (30440), 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) [2021-12-17 16:05:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21763 states to 21763 states and 30440 transitions. [2021-12-17 16:05:39,948 INFO L78 Accepts]: Start accepts. Automaton has 21763 states and 30440 transitions. Word has length 161 [2021-12-17 16:05:39,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:39,948 INFO L470 AbstractCegarLoop]: Abstraction has 21763 states and 30440 transitions. [2021-12-17 16:05:39,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 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) [2021-12-17 16:05:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 21763 states and 30440 transitions. [2021-12-17 16:05:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 16:05:39,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:39,958 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:39,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 16:05:39,959 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1801353677, now seen corresponding path program 1 times [2021-12-17 16:05:39,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:39,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885492001] [2021-12-17 16:05:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:39,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:40,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:40,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885492001] [2021-12-17 16:05:40,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885492001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:40,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:40,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:05:40,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785164112] [2021-12-17 16:05:40,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:40,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:05:40,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:40,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:05:40,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:05:40,029 INFO L87 Difference]: Start difference. First operand 21763 states and 30440 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 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) [2021-12-17 16:05:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:41,012 INFO L93 Difference]: Finished difference Result 30778 states and 43056 transitions. [2021-12-17 16:05:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:05:41,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 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 163 [2021-12-17 16:05:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:41,038 INFO L225 Difference]: With dead ends: 30778 [2021-12-17 16:05:41,038 INFO L226 Difference]: Without dead ends: 18884 [2021-12-17 16:05:41,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:41,048 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 21 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:41,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 1222 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:05:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18884 states. [2021-12-17 16:05:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18884 to 18884. [2021-12-17 16:05:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18884 states, 18883 states have (on average 1.3949584282158556) internal successors, (26341), 18883 states have internal predecessors, (26341), 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) [2021-12-17 16:05:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18884 states to 18884 states and 26341 transitions. [2021-12-17 16:05:42,058 INFO L78 Accepts]: Start accepts. Automaton has 18884 states and 26341 transitions. Word has length 163 [2021-12-17 16:05:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:42,058 INFO L470 AbstractCegarLoop]: Abstraction has 18884 states and 26341 transitions. [2021-12-17 16:05:42,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 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) [2021-12-17 16:05:42,058 INFO L276 IsEmpty]: Start isEmpty. Operand 18884 states and 26341 transitions. [2021-12-17 16:05:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 16:05:42,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:42,066 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:42,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 16:05:42,067 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1487758919, now seen corresponding path program 1 times [2021-12-17 16:05:42,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:42,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805460526] [2021-12-17 16:05:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:42,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:42,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805460526] [2021-12-17 16:05:42,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805460526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:42,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:42,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-17 16:05:42,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786996419] [2021-12-17 16:05:42,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:42,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 16:05:42,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:42,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 16:05:42,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-12-17 16:05:42,761 INFO L87 Difference]: Start difference. First operand 18884 states and 26341 transitions. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 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) [2021-12-17 16:05:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:05:55,349 INFO L93 Difference]: Finished difference Result 81713 states and 116815 transitions. [2021-12-17 16:05:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-17 16:05:55,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 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 168 [2021-12-17 16:05:55,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:05:55,497 INFO L225 Difference]: With dead ends: 81713 [2021-12-17 16:05:55,497 INFO L226 Difference]: Without dead ends: 78427 [2021-12-17 16:05:55,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1028, Invalid=4374, Unknown=0, NotChecked=0, Total=5402 [2021-12-17 16:05:55,526 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 7975 mSDsluCounter, 12774 mSDsCounter, 0 mSdLazyCounter, 4793 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7975 SdHoareTripleChecker+Valid, 13573 SdHoareTripleChecker+Invalid, 5088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 4793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 16:05:55,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7975 Valid, 13573 Invalid, 5088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 4793 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 16:05:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78427 states. [2021-12-17 16:05:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78427 to 19904. [2021-12-17 16:05:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19904 states, 19903 states have (on average 1.3838114857056725) internal successors, (27542), 19903 states have internal predecessors, (27542), 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) [2021-12-17 16:05:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19904 states to 19904 states and 27542 transitions. [2021-12-17 16:05:57,716 INFO L78 Accepts]: Start accepts. Automaton has 19904 states and 27542 transitions. Word has length 168 [2021-12-17 16:05:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:05:57,716 INFO L470 AbstractCegarLoop]: Abstraction has 19904 states and 27542 transitions. [2021-12-17 16:05:57,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 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) [2021-12-17 16:05:57,717 INFO L276 IsEmpty]: Start isEmpty. Operand 19904 states and 27542 transitions. [2021-12-17 16:05:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 16:05:57,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:05:57,726 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:05:57,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 16:05:57,726 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:05:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:05:57,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1422081639, now seen corresponding path program 1 times [2021-12-17 16:05:57,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:05:57,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663979828] [2021-12-17 16:05:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:05:57,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:05:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:05:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:05:57,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:05:57,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663979828] [2021-12-17 16:05:57,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663979828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:05:57,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:05:57,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 16:05:57,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901989455] [2021-12-17 16:05:57,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:05:57,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:05:57,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:05:57,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:05:57,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:05:57,781 INFO L87 Difference]: Start difference. First operand 19904 states and 27542 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 16:06:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:06:00,282 INFO L93 Difference]: Finished difference Result 36250 states and 52442 transitions. [2021-12-17 16:06:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:06:00,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 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 168 [2021-12-17 16:06:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:06:00,324 INFO L225 Difference]: With dead ends: 36250 [2021-12-17 16:06:00,324 INFO L226 Difference]: Without dead ends: 30868 [2021-12-17 16:06:00,333 INFO L932 BasicCegarLoop]: 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 [2021-12-17 16:06:00,334 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 893 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:06:00,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1402 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:06:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30868 states. [2021-12-17 16:06:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30868 to 25500. [2021-12-17 16:06:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25500 states, 25499 states have (on average 1.4120161574963723) internal successors, (36005), 25499 states have internal predecessors, (36005), 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) [2021-12-17 16:06:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25500 states to 25500 states and 36005 transitions. [2021-12-17 16:06:02,439 INFO L78 Accepts]: Start accepts. Automaton has 25500 states and 36005 transitions. Word has length 168 [2021-12-17 16:06:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:06:02,439 INFO L470 AbstractCegarLoop]: Abstraction has 25500 states and 36005 transitions. [2021-12-17 16:06:02,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 16:06:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 25500 states and 36005 transitions. [2021-12-17 16:06:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 16:06:02,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:06:02,448 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:06:02,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 16:06:02,449 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:06:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:06:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1392072489, now seen corresponding path program 1 times [2021-12-17 16:06:02,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:06:02,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268424171] [2021-12-17 16:06:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:06:02,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:06:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:06:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:06:02,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:06:02,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268424171] [2021-12-17 16:06:02,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268424171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:06:02,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:06:02,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:06:02,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101839391] [2021-12-17 16:06:02,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:06:02,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:06:02,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:06:02,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:06:02,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:06:02,497 INFO L87 Difference]: Start difference. First operand 25500 states and 36005 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 16:06:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:06:06,064 INFO L93 Difference]: Finished difference Result 61997 states and 89736 transitions. [2021-12-17 16:06:06,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:06:06,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 168 [2021-12-17 16:06:06,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:06:06,134 INFO L225 Difference]: With dead ends: 61997 [2021-12-17 16:06:06,134 INFO L226 Difference]: Without dead ends: 44973 [2021-12-17 16:06:06,165 INFO L932 BasicCegarLoop]: 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 [2021-12-17 16:06:06,166 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 223 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:06:06,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 690 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:06:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44973 states. [2021-12-17 16:06:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44973 to 44971. [2021-12-17 16:06:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44971 states, 44970 states have (on average 1.4144540804981098) internal successors, (63608), 44970 states have internal predecessors, (63608), 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) [2021-12-17 16:06:10,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44971 states to 44971 states and 63608 transitions. [2021-12-17 16:06:10,241 INFO L78 Accepts]: Start accepts. Automaton has 44971 states and 63608 transitions. Word has length 168 [2021-12-17 16:06:10,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:06:10,242 INFO L470 AbstractCegarLoop]: Abstraction has 44971 states and 63608 transitions. [2021-12-17 16:06:10,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 16:06:10,242 INFO L276 IsEmpty]: Start isEmpty. Operand 44971 states and 63608 transitions. [2021-12-17 16:06:10,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 16:06:10,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:06:10,258 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:06:10,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 16:06:10,258 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:06:10,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:06:10,258 INFO L85 PathProgramCache]: Analyzing trace with hash 631397051, now seen corresponding path program 1 times [2021-12-17 16:06:10,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:06:10,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076405054] [2021-12-17 16:06:10,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:06:10,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:06:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:06:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:06:10,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:06:10,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076405054] [2021-12-17 16:06:10,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076405054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:06:10,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:06:10,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 16:06:10,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446350563] [2021-12-17 16:06:10,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:06:10,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 16:06:10,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:06:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 16:06:10,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 16:06:10,375 INFO L87 Difference]: Start difference. First operand 44971 states and 63608 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 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) [2021-12-17 16:06:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:06:14,191 INFO L93 Difference]: Finished difference Result 68431 states and 99018 transitions. [2021-12-17 16:06:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:06:14,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 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 168 [2021-12-17 16:06:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:06:14,269 INFO L225 Difference]: With dead ends: 68431 [2021-12-17 16:06:14,270 INFO L226 Difference]: Without dead ends: 44973 [2021-12-17 16:06:14,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-17 16:06:14,304 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 1967 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1967 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 16:06:14,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1967 Valid, 1095 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 16:06:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44973 states. [2021-12-17 16:06:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44973 to 44971. [2021-12-17 16:06:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44971 states, 44970 states have (on average 1.408027573938181) internal successors, (63319), 44970 states have internal predecessors, (63319), 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) [2021-12-17 16:06:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44971 states to 44971 states and 63319 transitions. [2021-12-17 16:06:18,675 INFO L78 Accepts]: Start accepts. Automaton has 44971 states and 63319 transitions. Word has length 168 [2021-12-17 16:06:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:06:18,675 INFO L470 AbstractCegarLoop]: Abstraction has 44971 states and 63319 transitions. [2021-12-17 16:06:18,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 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) [2021-12-17 16:06:18,675 INFO L276 IsEmpty]: Start isEmpty. Operand 44971 states and 63319 transitions. [2021-12-17 16:06:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 16:06:18,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:06:18,692 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:06:18,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 16:06:18,692 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:06:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:06:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash 751294860, now seen corresponding path program 1 times [2021-12-17 16:06:18,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:06:18,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015138876] [2021-12-17 16:06:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:06:18,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:06:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:06:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:06:18,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:06:18,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015138876] [2021-12-17 16:06:18,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015138876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:06:18,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:06:18,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 16:06:18,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289794691] [2021-12-17 16:06:18,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:06:18,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 16:06:18,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:06:18,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 16:06:18,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 16:06:18,820 INFO L87 Difference]: Start difference. First operand 44971 states and 63319 transitions. Second operand has 10 states, 10 states have (on average 16.8) internal successors, (168), 9 states have internal predecessors, (168), 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) [2021-12-17 16:06:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:06:23,081 INFO L93 Difference]: Finished difference Result 88918 states and 125491 transitions. [2021-12-17 16:06:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 16:06:23,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.8) internal successors, (168), 9 states have internal predecessors, (168), 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 168 [2021-12-17 16:06:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:06:23,153 INFO L225 Difference]: With dead ends: 88918 [2021-12-17 16:06:23,153 INFO L226 Difference]: Without dead ends: 44971 [2021-12-17 16:06:23,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-17 16:06:23,186 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 2394 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2394 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:06:23,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2394 Valid, 570 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 16:06:23,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44971 states. [2021-12-17 16:06:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44971 to 44971. [2021-12-17 16:06:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44971 states, 44970 states have (on average 1.3824104958861463) internal successors, (62167), 44970 states have internal predecessors, (62167), 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) [2021-12-17 16:06:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44971 states to 44971 states and 62167 transitions. [2021-12-17 16:06:27,596 INFO L78 Accepts]: Start accepts. Automaton has 44971 states and 62167 transitions. Word has length 168 [2021-12-17 16:06:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:06:27,597 INFO L470 AbstractCegarLoop]: Abstraction has 44971 states and 62167 transitions. [2021-12-17 16:06:27,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.8) internal successors, (168), 9 states have internal predecessors, (168), 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) [2021-12-17 16:06:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 44971 states and 62167 transitions. [2021-12-17 16:06:27,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 16:06:27,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:06:27,614 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:06:27,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 16:06:27,614 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:06:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:06:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1648521291, now seen corresponding path program 1 times [2021-12-17 16:06:27,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:06:27,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251598722] [2021-12-17 16:06:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:06:27,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:06:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:06:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:06:27,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:06:27,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251598722] [2021-12-17 16:06:27,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251598722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:06:27,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:06:27,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 16:06:27,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522978752] [2021-12-17 16:06:27,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:06:27,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 16:06:27,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:06:27,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 16:06:27,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:06:27,674 INFO L87 Difference]: Start difference. First operand 44971 states and 62167 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2021-12-17 16:06:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:06:32,417 INFO L93 Difference]: Finished difference Result 72721 states and 103270 transitions. [2021-12-17 16:06:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 16:06:32,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 168 [2021-12-17 16:06:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:06:32,492 INFO L225 Difference]: With dead ends: 72721 [2021-12-17 16:06:32,492 INFO L226 Difference]: Without dead ends: 44973 [2021-12-17 16:06:32,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 16:06:32,516 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 604 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:06:32,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 826 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:06:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44973 states.