./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c5be25d34b5f565c0e61b447a9da3cd9d228084b5ddd898e062981f46972caa8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:09:30,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:09:30,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:09:30,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:09:30,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:09:30,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:09:30,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:09:30,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:09:30,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:09:30,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:09:30,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:09:30,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:09:30,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:09:30,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:09:30,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:09:30,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:09:30,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:09:30,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:09:30,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:09:30,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:09:30,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:09:30,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:09:30,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:09:30,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:09:30,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:09:30,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:09:30,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:09:30,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:09:30,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:09:30,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:09:30,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:09:30,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:09:30,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:09:30,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:09:30,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:09:30,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:09:30,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:09:30,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:09:30,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:09:30,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:09:30,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:09:30,317 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:09:30,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:09:30,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:09:30,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:09:30,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:09:30,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:09:30,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:09:30,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:09:30,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:09:30,348 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:09:30,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:09:30,349 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:09:30,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:09:30,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:09:30,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:09:30,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:09:30,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:09:30,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:09:30,350 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:09:30,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:09:30,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:09:30,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:09:30,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:09:30,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:09:30,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:09:30,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:09:30,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:09:30,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:09:30,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:09:30,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:09:30,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:09:30,352 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:09:30,352 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:09:30,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:09:30,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5be25d34b5f565c0e61b447a9da3cd9d228084b5ddd898e062981f46972caa8 [2021-12-28 01:09:30,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:09:30,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:09:30,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:09:30,639 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:09:30,640 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:09:30,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2021-12-28 01:09:30,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38b35e07b/5a3ecacd28f0446c8628cc8bbd3719cc/FLAG3f7665157 [2021-12-28 01:09:31,088 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:09:31,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2021-12-28 01:09:31,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38b35e07b/5a3ecacd28f0446c8628cc8bbd3719cc/FLAG3f7665157 [2021-12-28 01:09:31,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38b35e07b/5a3ecacd28f0446c8628cc8bbd3719cc [2021-12-28 01:09:31,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:09:31,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:09:31,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:09:31,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:09:31,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:09:31,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7efd73b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31, skipping insertion in model container [2021-12-28 01:09:31,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:09:31,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:09:31,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c[9280,9293] [2021-12-28 01:09:31,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:09:31,379 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:09:31,416 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c[9280,9293] [2021-12-28 01:09:31,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:09:31,432 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:09:31,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31 WrapperNode [2021-12-28 01:09:31,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:09:31,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:09:31,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:09:31,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:09:31,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,481 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 313 [2021-12-28 01:09:31,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:09:31,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:09:31,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:09:31,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:09:31,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:09:31,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:09:31,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:09:31,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:09:31,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31" (1/1) ... [2021-12-28 01:09:31,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:09:31,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:31,543 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) [2021-12-28 01:09:31,550 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 [2021-12-28 01:09:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:09:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:09:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:09:31,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:09:31,626 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:09:31,627 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:09:31,961 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:09:31,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:09:31,967 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:09:31,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:09:31 BoogieIcfgContainer [2021-12-28 01:09:31,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:09:31,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:09:31,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:09:31,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:09:31,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:09:31" (1/3) ... [2021-12-28 01:09:31,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d72cc0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:09:31, skipping insertion in model container [2021-12-28 01:09:31,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:31" (2/3) ... [2021-12-28 01:09:31,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d72cc0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:09:31, skipping insertion in model container [2021-12-28 01:09:31,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:09:31" (3/3) ... [2021-12-28 01:09:31,974 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2021-12-28 01:09:31,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:09:31,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:09:32,021 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:09:32,027 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 [2021-12-28 01:09:32,027 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:09:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 95 states have (on average 1.694736842105263) internal successors, (161), 96 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) [2021-12-28 01:09:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 01:09:32,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,048 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] [2021-12-28 01:09:32,049 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1799424214, now seen corresponding path program 1 times [2021-12-28 01:09:32,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51270185] [2021-12-28 01:09:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51270185] [2021-12-28 01:09:32,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51270185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:09:32,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604764799] [2021-12-28 01:09:32,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 01:09:32,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 01:09:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:09:32,252 INFO L87 Difference]: Start difference. First operand has 97 states, 95 states have (on average 1.694736842105263) internal successors, (161), 96 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) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:32,283 INFO L93 Difference]: Finished difference Result 165 states and 268 transitions. [2021-12-28 01:09:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 01:09:32,285 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-28 01:09:32,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:32,292 INFO L225 Difference]: With dead ends: 165 [2021-12-28 01:09:32,292 INFO L226 Difference]: Without dead ends: 93 [2021-12-28 01:09:32,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:09:32,299 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:32,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:32,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-28 01:09:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-28 01:09:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.673913043478261) internal successors, (154), 92 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 154 transitions. [2021-12-28 01:09:32,335 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 154 transitions. Word has length 29 [2021-12-28 01:09:32,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:32,335 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 154 transitions. [2021-12-28 01:09:32,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,336 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 154 transitions. [2021-12-28 01:09:32,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 01:09:32,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,339 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] [2021-12-28 01:09:32,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:09:32,339 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1665410708, now seen corresponding path program 1 times [2021-12-28 01:09:32,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208317253] [2021-12-28 01:09:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208317253] [2021-12-28 01:09:32,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208317253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:32,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955956203] [2021-12-28 01:09:32,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:32,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:32,416 INFO L87 Difference]: Start difference. First operand 93 states and 154 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:32,468 INFO L93 Difference]: Finished difference Result 223 states and 358 transitions. [2021-12-28 01:09:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-28 01:09:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:32,470 INFO L225 Difference]: With dead ends: 223 [2021-12-28 01:09:32,470 INFO L226 Difference]: Without dead ends: 156 [2021-12-28 01:09:32,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:32,472 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 102 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:32,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 571 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-28 01:09:32,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 93. [2021-12-28 01:09:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4130434782608696) internal successors, (130), 92 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 130 transitions. [2021-12-28 01:09:32,484 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 130 transitions. Word has length 29 [2021-12-28 01:09:32,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:32,484 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 130 transitions. [2021-12-28 01:09:32,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 130 transitions. [2021-12-28 01:09:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-28 01:09:32,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,487 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] [2021-12-28 01:09:32,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:09:32,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1640520051, now seen corresponding path program 1 times [2021-12-28 01:09:32,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220130240] [2021-12-28 01:09:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220130240] [2021-12-28 01:09:32,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220130240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:32,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76752459] [2021-12-28 01:09:32,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:32,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:32,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:32,559 INFO L87 Difference]: Start difference. First operand 93 states and 130 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:32,571 INFO L93 Difference]: Finished difference Result 207 states and 310 transitions. [2021-12-28 01:09:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:32,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-28 01:09:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:32,573 INFO L225 Difference]: With dead ends: 207 [2021-12-28 01:09:32,573 INFO L226 Difference]: Without dead ends: 144 [2021-12-28 01:09:32,573 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 [2021-12-28 01:09:32,574 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 84 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:32,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 283 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-28 01:09:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2021-12-28 01:09:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.475177304964539) internal successors, (208), 141 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 208 transitions. [2021-12-28 01:09:32,582 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 208 transitions. Word has length 52 [2021-12-28 01:09:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:32,583 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 208 transitions. [2021-12-28 01:09:32,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 208 transitions. [2021-12-28 01:09:32,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 01:09:32,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,584 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] [2021-12-28 01:09:32,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:09:32,585 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash -609394571, now seen corresponding path program 1 times [2021-12-28 01:09:32,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702663428] [2021-12-28 01:09:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702663428] [2021-12-28 01:09:32,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702663428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:32,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42233929] [2021-12-28 01:09:32,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:32,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:32,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:32,653 INFO L87 Difference]: Start difference. First operand 142 states and 208 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:32,676 INFO L93 Difference]: Finished difference Result 342 states and 524 transitions. [2021-12-28 01:09:32,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:32,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-28 01:09:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:32,678 INFO L225 Difference]: With dead ends: 342 [2021-12-28 01:09:32,678 INFO L226 Difference]: Without dead ends: 230 [2021-12-28 01:09:32,680 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 [2021-12-28 01:09:32,684 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 79 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:32,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 274 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-28 01:09:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2021-12-28 01:09:32,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.5110132158590308) internal successors, (343), 227 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 343 transitions. [2021-12-28 01:09:32,698 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 343 transitions. Word has length 53 [2021-12-28 01:09:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:32,698 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 343 transitions. [2021-12-28 01:09:32,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 343 transitions. [2021-12-28 01:09:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-28 01:09:32,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,699 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] [2021-12-28 01:09:32,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:09:32,699 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1908001763, now seen corresponding path program 1 times [2021-12-28 01:09:32,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505457335] [2021-12-28 01:09:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505457335] [2021-12-28 01:09:32,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505457335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:32,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636515609] [2021-12-28 01:09:32,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:32,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:32,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:32,745 INFO L87 Difference]: Start difference. First operand 228 states and 343 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:32,780 INFO L93 Difference]: Finished difference Result 576 states and 889 transitions. [2021-12-28 01:09:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:32,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-28 01:09:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:32,783 INFO L225 Difference]: With dead ends: 576 [2021-12-28 01:09:32,783 INFO L226 Difference]: Without dead ends: 378 [2021-12-28 01:09:32,784 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 [2021-12-28 01:09:32,785 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 74 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:32,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 265 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-28 01:09:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 376. [2021-12-28 01:09:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.5226666666666666) internal successors, (571), 375 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 571 transitions. [2021-12-28 01:09:32,812 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 571 transitions. Word has length 54 [2021-12-28 01:09:32,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:32,813 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 571 transitions. [2021-12-28 01:09:32,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:32,813 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 571 transitions. [2021-12-28 01:09:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-28 01:09:32,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,818 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] [2021-12-28 01:09:32,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:09:32,819 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,819 INFO L85 PathProgramCache]: Analyzing trace with hash 553512453, now seen corresponding path program 1 times [2021-12-28 01:09:32,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260944752] [2021-12-28 01:09:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260944752] [2021-12-28 01:09:32,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260944752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:09:32,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663855210] [2021-12-28 01:09:32,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:32,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:32,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:32,893 INFO L87 Difference]: Start difference. First operand 376 states and 571 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:33,020 INFO L93 Difference]: Finished difference Result 2106 states and 3276 transitions. [2021-12-28 01:09:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-28 01:09:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:33,029 INFO L225 Difference]: With dead ends: 2106 [2021-12-28 01:09:33,029 INFO L226 Difference]: Without dead ends: 1760 [2021-12-28 01:09:33,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:09:33,032 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 725 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:33,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 1064 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-12-28 01:09:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 720. [2021-12-28 01:09:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 1.5229485396383866) internal successors, (1095), 719 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1095 transitions. [2021-12-28 01:09:33,090 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1095 transitions. Word has length 55 [2021-12-28 01:09:33,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:33,091 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 1095 transitions. [2021-12-28 01:09:33,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,092 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1095 transitions. [2021-12-28 01:09:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-28 01:09:33,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:33,094 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] [2021-12-28 01:09:33,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:09:33,094 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:33,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:33,095 INFO L85 PathProgramCache]: Analyzing trace with hash -404306473, now seen corresponding path program 1 times [2021-12-28 01:09:33,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:33,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946572248] [2021-12-28 01:09:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:33,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:33,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:33,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946572248] [2021-12-28 01:09:33,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946572248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:33,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:33,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:09:33,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046729200] [2021-12-28 01:09:33,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:33,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:33,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:33,172 INFO L87 Difference]: Start difference. First operand 720 states and 1095 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:33,345 INFO L93 Difference]: Finished difference Result 3216 states and 4899 transitions. [2021-12-28 01:09:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:33,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-28 01:09:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:33,353 INFO L225 Difference]: With dead ends: 3216 [2021-12-28 01:09:33,353 INFO L226 Difference]: Without dead ends: 2526 [2021-12-28 01:09:33,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:33,354 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 336 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:33,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 604 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2021-12-28 01:09:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 2520. [2021-12-28 01:09:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 1.5144898769352917) internal successors, (3815), 2519 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3815 transitions. [2021-12-28 01:09:33,479 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3815 transitions. Word has length 56 [2021-12-28 01:09:33,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:33,480 INFO L470 AbstractCegarLoop]: Abstraction has 2520 states and 3815 transitions. [2021-12-28 01:09:33,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3815 transitions. [2021-12-28 01:09:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-28 01:09:33,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:33,481 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] [2021-12-28 01:09:33,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:09:33,481 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:33,482 INFO L85 PathProgramCache]: Analyzing trace with hash 399274429, now seen corresponding path program 1 times [2021-12-28 01:09:33,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:33,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571816609] [2021-12-28 01:09:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:33,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:33,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:33,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571816609] [2021-12-28 01:09:33,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571816609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:33,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:33,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:33,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038281566] [2021-12-28 01:09:33,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:33,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:33,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:33,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:33,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:33,507 INFO L87 Difference]: Start difference. First operand 2520 states and 3815 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:33,713 INFO L93 Difference]: Finished difference Result 6924 states and 10425 transitions. [2021-12-28 01:09:33,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:33,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-28 01:09:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:33,726 INFO L225 Difference]: With dead ends: 6924 [2021-12-28 01:09:33,726 INFO L226 Difference]: Without dead ends: 4434 [2021-12-28 01:09:33,728 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 [2021-12-28 01:09:33,729 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 88 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:33,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 307 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2021-12-28 01:09:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 4432. [2021-12-28 01:09:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 4431 states have (on average 1.4838636876551567) internal successors, (6575), 4431 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6575 transitions. [2021-12-28 01:09:33,948 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6575 transitions. Word has length 56 [2021-12-28 01:09:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:33,949 INFO L470 AbstractCegarLoop]: Abstraction has 4432 states and 6575 transitions. [2021-12-28 01:09:33,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6575 transitions. [2021-12-28 01:09:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:09:33,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:33,950 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] [2021-12-28 01:09:33,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:09:33,951 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:33,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:33,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1681995988, now seen corresponding path program 1 times [2021-12-28 01:09:33,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:33,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876124694] [2021-12-28 01:09:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:33,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:34,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:34,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876124694] [2021-12-28 01:09:34,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876124694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:34,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:34,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:34,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231695285] [2021-12-28 01:09:34,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:34,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:34,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:34,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:34,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:34,018 INFO L87 Difference]: Start difference. First operand 4432 states and 6575 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:34,443 INFO L93 Difference]: Finished difference Result 9346 states and 13632 transitions. [2021-12-28 01:09:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:09:34,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-28 01:09:34,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:34,496 INFO L225 Difference]: With dead ends: 9346 [2021-12-28 01:09:34,496 INFO L226 Difference]: Without dead ends: 9344 [2021-12-28 01:09:34,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:09:34,498 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 279 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:34,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 563 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2021-12-28 01:09:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 4816. [2021-12-28 01:09:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4816 states, 4815 states have (on average 1.44527518172378) internal successors, (6959), 4815 states have internal predecessors, (6959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4816 states to 4816 states and 6959 transitions. [2021-12-28 01:09:34,805 INFO L78 Accepts]: Start accepts. Automaton has 4816 states and 6959 transitions. Word has length 57 [2021-12-28 01:09:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:34,806 INFO L470 AbstractCegarLoop]: Abstraction has 4816 states and 6959 transitions. [2021-12-28 01:09:34,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4816 states and 6959 transitions. [2021-12-28 01:09:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-28 01:09:34,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:34,807 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] [2021-12-28 01:09:34,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:09:34,807 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:34,807 INFO L85 PathProgramCache]: Analyzing trace with hash 654846656, now seen corresponding path program 1 times [2021-12-28 01:09:34,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:34,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057252705] [2021-12-28 01:09:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:34,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:34,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057252705] [2021-12-28 01:09:34,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057252705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:34,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:34,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:34,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993530855] [2021-12-28 01:09:34,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:34,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:34,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:34,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:34,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:34,863 INFO L87 Difference]: Start difference. First operand 4816 states and 6959 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:35,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:35,235 INFO L93 Difference]: Finished difference Result 11534 states and 16675 transitions. [2021-12-28 01:09:35,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:35,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-28 01:09:35,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:35,254 INFO L225 Difference]: With dead ends: 11534 [2021-12-28 01:09:35,254 INFO L226 Difference]: Without dead ends: 6748 [2021-12-28 01:09:35,259 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 [2021-12-28 01:09:35,260 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 65 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:35,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 227 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-12-28 01:09:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6746. [2021-12-28 01:09:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6746 states, 6745 states have (on average 1.4364714603409934) internal successors, (9689), 6745 states have internal predecessors, (9689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6746 states to 6746 states and 9689 transitions. [2021-12-28 01:09:35,590 INFO L78 Accepts]: Start accepts. Automaton has 6746 states and 9689 transitions. Word has length 58 [2021-12-28 01:09:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:35,590 INFO L470 AbstractCegarLoop]: Abstraction has 6746 states and 9689 transitions. [2021-12-28 01:09:35,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 6746 states and 9689 transitions. [2021-12-28 01:09:35,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 01:09:35,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:35,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:35,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:09:35,594 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:35,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:35,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2133316492, now seen corresponding path program 1 times [2021-12-28 01:09:35,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:35,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416080616] [2021-12-28 01:09:35,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:35,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:35,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:35,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416080616] [2021-12-28 01:09:35,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416080616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:09:35,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396475797] [2021-12-28 01:09:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:35,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:35,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:09:35,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:09:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:35,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-28 01:09:35,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:09:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:35,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:09:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:36,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396475797] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:09:36,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:09:36,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2021-12-28 01:09:36,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907057453] [2021-12-28 01:09:36,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:09:36,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:09:36,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:36,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:09:36,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:09:36,317 INFO L87 Difference]: Start difference. First operand 6746 states and 9689 transitions. Second operand has 9 states, 9 states have (on average 23.22222222222222) internal successors, (209), 9 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:37,105 INFO L93 Difference]: Finished difference Result 21003 states and 30443 transitions. [2021-12-28 01:09:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:09:37,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 23.22222222222222) internal successors, (209), 9 states have internal predecessors, (209), 0 states have call successors, (0), 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 81 [2021-12-28 01:09:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:37,140 INFO L225 Difference]: With dead ends: 21003 [2021-12-28 01:09:37,141 INFO L226 Difference]: Without dead ends: 16217 [2021-12-28 01:09:37,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:09:37,153 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 768 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 820 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 [2021-12-28 01:09:37,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 820 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16217 states. [2021-12-28 01:09:37,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16217 to 15450. [2021-12-28 01:09:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15450 states, 15449 states have (on average 1.432908278853) internal successors, (22137), 15449 states have internal predecessors, (22137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15450 states to 15450 states and 22137 transitions. [2021-12-28 01:09:37,879 INFO L78 Accepts]: Start accepts. Automaton has 15450 states and 22137 transitions. Word has length 81 [2021-12-28 01:09:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:37,880 INFO L470 AbstractCegarLoop]: Abstraction has 15450 states and 22137 transitions. [2021-12-28 01:09:37,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.22222222222222) internal successors, (209), 9 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 15450 states and 22137 transitions. [2021-12-28 01:09:37,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 01:09:37,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:37,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:37,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 01:09:38,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-28 01:09:38,101 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:38,101 INFO L85 PathProgramCache]: Analyzing trace with hash -963170832, now seen corresponding path program 1 times [2021-12-28 01:09:38,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:38,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944142311] [2021-12-28 01:09:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:38,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 01:09:38,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:38,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944142311] [2021-12-28 01:09:38,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944142311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:38,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:38,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:09:38,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376567152] [2021-12-28 01:09:38,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:38,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:38,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:38,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:38,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:38,146 INFO L87 Difference]: Start difference. First operand 15450 states and 22137 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:39,259 INFO L93 Difference]: Finished difference Result 33108 states and 47710 transitions. [2021-12-28 01:09:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:39,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 82 [2021-12-28 01:09:39,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:39,317 INFO L225 Difference]: With dead ends: 33108 [2021-12-28 01:09:39,317 INFO L226 Difference]: Without dead ends: 26854 [2021-12-28 01:09:39,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:09:39,331 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 563 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:39,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 832 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:09:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26854 states. [2021-12-28 01:09:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26854 to 21034. [2021-12-28 01:09:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21034 states, 21033 states have (on average 1.4303713212570721) internal successors, (30085), 21033 states have internal predecessors, (30085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21034 states to 21034 states and 30085 transitions. [2021-12-28 01:09:40,499 INFO L78 Accepts]: Start accepts. Automaton has 21034 states and 30085 transitions. Word has length 82 [2021-12-28 01:09:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:40,499 INFO L470 AbstractCegarLoop]: Abstraction has 21034 states and 30085 transitions. [2021-12-28 01:09:40,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 21034 states and 30085 transitions. [2021-12-28 01:09:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 01:09:40,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:40,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:40,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:09:40,504 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:40,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1851338368, now seen corresponding path program 1 times [2021-12-28 01:09:40,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:40,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955741345] [2021-12-28 01:09:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:40,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:40,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:40,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955741345] [2021-12-28 01:09:40,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955741345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:40,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:40,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:40,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633463798] [2021-12-28 01:09:40,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:40,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:40,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:40,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:40,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:40,536 INFO L87 Difference]: Start difference. First operand 21034 states and 30085 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:41,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:41,654 INFO L93 Difference]: Finished difference Result 42178 states and 60292 transitions. [2021-12-28 01:09:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:41,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-28 01:09:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:41,713 INFO L225 Difference]: With dead ends: 42178 [2021-12-28 01:09:41,713 INFO L226 Difference]: Without dead ends: 29912 [2021-12-28 01:09:41,731 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 [2021-12-28 01:09:41,732 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 65 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:41,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 270 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:41,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29912 states. [2021-12-28 01:09:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29912 to 27690. [2021-12-28 01:09:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27690 states, 27689 states have (on average 1.4124742677597601) internal successors, (39110), 27689 states have internal predecessors, (39110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27690 states to 27690 states and 39110 transitions. [2021-12-28 01:09:43,160 INFO L78 Accepts]: Start accepts. Automaton has 27690 states and 39110 transitions. Word has length 82 [2021-12-28 01:09:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:43,161 INFO L470 AbstractCegarLoop]: Abstraction has 27690 states and 39110 transitions. [2021-12-28 01:09:43,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 27690 states and 39110 transitions. [2021-12-28 01:09:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 01:09:43,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:43,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:43,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:09:43,167 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:43,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:43,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2016282864, now seen corresponding path program 1 times [2021-12-28 01:09:43,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:43,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576692348] [2021-12-28 01:09:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:43,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:43,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:43,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576692348] [2021-12-28 01:09:43,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576692348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:43,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:43,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:43,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772388941] [2021-12-28 01:09:43,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:43,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:43,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:43,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:43,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:43,203 INFO L87 Difference]: Start difference. First operand 27690 states and 39110 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:44,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:44,756 INFO L93 Difference]: Finished difference Result 44161 states and 62026 transitions. [2021-12-28 01:09:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:44,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-28 01:09:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:44,796 INFO L225 Difference]: With dead ends: 44161 [2021-12-28 01:09:44,799 INFO L226 Difference]: Without dead ends: 28799 [2021-12-28 01:09:44,817 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 [2021-12-28 01:09:44,817 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 66 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:44,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 283 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28799 states. [2021-12-28 01:09:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28799 to 27641. [2021-12-28 01:09:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27641 states, 27640 states have (on average 1.3827424023154848) internal successors, (38219), 27640 states have internal predecessors, (38219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:46,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27641 states to 27641 states and 38219 transitions. [2021-12-28 01:09:46,285 INFO L78 Accepts]: Start accepts. Automaton has 27641 states and 38219 transitions. Word has length 82 [2021-12-28 01:09:46,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:46,286 INFO L470 AbstractCegarLoop]: Abstraction has 27641 states and 38219 transitions. [2021-12-28 01:09:46,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:46,286 INFO L276 IsEmpty]: Start isEmpty. Operand 27641 states and 38219 transitions. [2021-12-28 01:09:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 01:09:46,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:46,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:46,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:09:46,291 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:46,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:46,291 INFO L85 PathProgramCache]: Analyzing trace with hash 990402630, now seen corresponding path program 1 times [2021-12-28 01:09:46,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:46,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735504891] [2021-12-28 01:09:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:46,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:46,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:46,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735504891] [2021-12-28 01:09:46,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735504891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:46,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:46,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:46,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004859826] [2021-12-28 01:09:46,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:46,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:46,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:46,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:46,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:46,326 INFO L87 Difference]: Start difference. First operand 27641 states and 38219 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:48,365 INFO L93 Difference]: Finished difference Result 74352 states and 102593 transitions. [2021-12-28 01:09:48,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:48,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-28 01:09:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:48,433 INFO L225 Difference]: With dead ends: 74352 [2021-12-28 01:09:48,434 INFO L226 Difference]: Without dead ends: 50161 [2021-12-28 01:09:48,455 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 [2021-12-28 01:09:48,456 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 63 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:48,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 254 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:48,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50161 states. [2021-12-28 01:09:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50161 to 50043. [2021-12-28 01:09:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50043 states, 50042 states have (on average 1.3631749330562328) internal successors, (68216), 50042 states have internal predecessors, (68216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50043 states to 50043 states and 68216 transitions. [2021-12-28 01:09:51,209 INFO L78 Accepts]: Start accepts. Automaton has 50043 states and 68216 transitions. Word has length 82 [2021-12-28 01:09:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:51,209 INFO L470 AbstractCegarLoop]: Abstraction has 50043 states and 68216 transitions. [2021-12-28 01:09:51,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 50043 states and 68216 transitions. [2021-12-28 01:09:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 01:09:51,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:51,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:51,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:09:51,219 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:51,219 INFO L85 PathProgramCache]: Analyzing trace with hash -634913072, now seen corresponding path program 1 times [2021-12-28 01:09:51,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:51,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871157267] [2021-12-28 01:09:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:51,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 01:09:51,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:51,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871157267] [2021-12-28 01:09:51,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871157267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:51,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:51,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:09:51,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821652819] [2021-12-28 01:09:51,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:51,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:51,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:51,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:51,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:51,266 INFO L87 Difference]: Start difference. First operand 50043 states and 68216 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:54,755 INFO L93 Difference]: Finished difference Result 88000 states and 121242 transitions. [2021-12-28 01:09:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:54,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-28 01:09:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:54,872 INFO L225 Difference]: With dead ends: 88000 [2021-12-28 01:09:54,872 INFO L226 Difference]: Without dead ends: 79830 [2021-12-28 01:09:54,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:09:54,906 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 606 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:54,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 744 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79830 states. [2021-12-28 01:09:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79830 to 57731. [2021-12-28 01:09:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57731 states, 57730 states have (on average 1.3645591546856055) internal successors, (78776), 57730 states have internal predecessors, (78776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57731 states to 57731 states and 78776 transitions. [2021-12-28 01:09:58,170 INFO L78 Accepts]: Start accepts. Automaton has 57731 states and 78776 transitions. Word has length 82 [2021-12-28 01:09:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:58,170 INFO L470 AbstractCegarLoop]: Abstraction has 57731 states and 78776 transitions. [2021-12-28 01:09:58,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:58,170 INFO L276 IsEmpty]: Start isEmpty. Operand 57731 states and 78776 transitions. [2021-12-28 01:09:58,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 01:09:58,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:58,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:58,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:09:58,182 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash 620499738, now seen corresponding path program 1 times [2021-12-28 01:09:58,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:58,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667375060] [2021-12-28 01:09:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:58,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 01:09:58,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667375060] [2021-12-28 01:09:58,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667375060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:58,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:58,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:09:58,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132327293] [2021-12-28 01:09:58,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:58,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:58,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:58,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:58,312 INFO L87 Difference]: Start difference. First operand 57731 states and 78776 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:02,100 INFO L93 Difference]: Finished difference Result 99531 states and 137170 transitions. [2021-12-28 01:10:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:10:02,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 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 82 [2021-12-28 01:10:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:02,222 INFO L225 Difference]: With dead ends: 99531 [2021-12-28 01:10:02,222 INFO L226 Difference]: Without dead ends: 87267 [2021-12-28 01:10:02,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:10:02,246 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 572 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:02,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 811 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87267 states.