./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.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 cb07c62e0c8f9c002ab72b797de071664dce20871b109c1b4c0b79acbb73493c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:50:21,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:50:21,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:50:21,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:50:21,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:50:21,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:50:21,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:50:21,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:50:21,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:50:21,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:50:21,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:50:21,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:50:21,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:50:21,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:50:21,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:50:21,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:50:21,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:50:21,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:50:21,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:50:21,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:50:21,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:50:21,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:50:21,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:50:21,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:50:21,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:50:21,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:50:21,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:50:21,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:50:21,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:50:21,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:50:21,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:50:21,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:50:21,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:50:21,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:50:21,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:50:21,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:50:21,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:50:21,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:50:21,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:50:21,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:50:21,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:50:21,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:50:21,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:50:21,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:50:21,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:50:21,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:50:21,249 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:50:21,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:50:21,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:50:21,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:50:21,250 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:50:21,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:50:21,251 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:50:21,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:50:21,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:50:21,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:50:21,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:50:21,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:50:21,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:50:21,252 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:50:21,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:50:21,252 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:50:21,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:50:21,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:50:21,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:50:21,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:50:21,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:50:21,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:50:21,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:50:21,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:50:21,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:50:21,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:50:21,254 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:50:21,254 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:50:21,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:50:21,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:50:21,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb07c62e0c8f9c002ab72b797de071664dce20871b109c1b4c0b79acbb73493c [2021-12-21 14:50:21,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:50:21,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:50:21,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:50:21,486 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:50:21,486 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:50:21,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2021-12-21 14:50:21,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623484d97/f440bf30ec404dc7a4efa1303db791bc/FLAG8929f36b8 [2021-12-21 14:50:21,948 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:50:21,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2021-12-21 14:50:21,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623484d97/f440bf30ec404dc7a4efa1303db791bc/FLAG8929f36b8 [2021-12-21 14:50:21,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623484d97/f440bf30ec404dc7a4efa1303db791bc [2021-12-21 14:50:21,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:50:21,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:50:21,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:50:21,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:50:21,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:50:21,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:50:21" (1/1) ... [2021-12-21 14:50:21,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df4247c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:21, skipping insertion in model container [2021-12-21 14:50:21,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:50:21" (1/1) ... [2021-12-21 14:50:21,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:50:22,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:50:22,213 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/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[913,926] [2021-12-21 14:50:22,258 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/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[5977,5990] [2021-12-21 14:50:22,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:50:22,347 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:50:22,355 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/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[913,926] [2021-12-21 14:50:22,362 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/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[5977,5990] [2021-12-21 14:50:22,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:50:22,425 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:50:22,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22 WrapperNode [2021-12-21 14:50:22,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:50:22,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:50:22,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:50:22,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:50:22,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22" (1/1) ... [2021-12-21 14:50:22,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22" (1/1) ... [2021-12-21 14:50:22,504 INFO L137 Inliner]: procedures = 72, calls = 84, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1055 [2021-12-21 14:50:22,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:50:22,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:50:22,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:50:22,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:50:22,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22" (1/1) ... [2021-12-21 14:50:22,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22" (1/1) ... [2021-12-21 14:50:22,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22" (1/1) ... [2021-12-21 14:50:22,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22" (1/1) ... [2021-12-21 14:50:22,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22" (1/1) ... [2021-12-21 14:50:22,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22" (1/1) ... [2021-12-21 14:50:22,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22" (1/1) ... [2021-12-21 14:50:22,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:50:22,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:50:22,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:50:22,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:50:22,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22" (1/1) ... [2021-12-21 14:50:22,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:50:22,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:22,621 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) [2021-12-21 14:50:22,625 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 [2021-12-21 14:50:22,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:50:22,648 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:50:22,648 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:50:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-21 14:50:22,649 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-21 14:50:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:50:22,649 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:50:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:50:22,649 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:50:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:50:22,650 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:50:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:50:22,650 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:50:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:50:22,650 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:50:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:50:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:50:22,650 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:50:22,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:50:22,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:50:22,651 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:50:22,651 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:50:22,799 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:50:22,800 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:50:23,515 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:50:23,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:50:23,529 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-21 14:50:23,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:50:23 BoogieIcfgContainer [2021-12-21 14:50:23,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:50:23,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:50:23,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:50:23,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:50:23,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:50:21" (1/3) ... [2021-12-21 14:50:23,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd6c6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:50:23, skipping insertion in model container [2021-12-21 14:50:23,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:22" (2/3) ... [2021-12-21 14:50:23,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd6c6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:50:23, skipping insertion in model container [2021-12-21 14:50:23,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:50:23" (3/3) ... [2021-12-21 14:50:23,539 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2021-12-21 14:50:23,546 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:50:23,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:50:23,577 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:50:23,581 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 [2021-12-21 14:50:23,581 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:50:23,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 454 states, 410 states have (on average 1.648780487804878) internal successors, (676), 415 states have internal predecessors, (676), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-21 14:50:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 14:50:23,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:23,608 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] [2021-12-21 14:50:23,608 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1427645478, now seen corresponding path program 1 times [2021-12-21 14:50:23,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:23,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344415863] [2021-12-21 14:50:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:23,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:23,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:23,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 14:50:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:23,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:23,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344415863] [2021-12-21 14:50:23,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344415863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:23,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:23,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:23,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708004092] [2021-12-21 14:50:23,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:23,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:23,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:23,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:23,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:23,873 INFO L87 Difference]: Start difference. First operand has 454 states, 410 states have (on average 1.648780487804878) internal successors, (676), 415 states have internal predecessors, (676), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:24,156 INFO L93 Difference]: Finished difference Result 953 states and 1548 transitions. [2021-12-21 14:50:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-21 14:50:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:24,188 INFO L225 Difference]: With dead ends: 953 [2021-12-21 14:50:24,188 INFO L226 Difference]: Without dead ends: 514 [2021-12-21 14:50:24,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:24,194 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 944 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:24,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 1120 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-21 14:50:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 508. [2021-12-21 14:50:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 459 states have (on average 1.5315904139433552) internal successors, (703), 463 states have internal predecessors, (703), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-21 14:50:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 779 transitions. [2021-12-21 14:50:24,254 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 779 transitions. Word has length 44 [2021-12-21 14:50:24,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:24,255 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 779 transitions. [2021-12-21 14:50:24,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 779 transitions. [2021-12-21 14:50:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:50:24,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:24,257 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] [2021-12-21 14:50:24,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:50:24,257 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2087439571, now seen corresponding path program 1 times [2021-12-21 14:50:24,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:24,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549976439] [2021-12-21 14:50:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:24,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:50:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:24,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:24,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549976439] [2021-12-21 14:50:24,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549976439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:24,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:24,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:24,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874898282] [2021-12-21 14:50:24,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:24,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:24,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:24,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:24,327 INFO L87 Difference]: Start difference. First operand 508 states and 779 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:24,712 INFO L93 Difference]: Finished difference Result 756 states and 1119 transitions. [2021-12-21 14:50:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:24,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:50:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:24,715 INFO L225 Difference]: With dead ends: 756 [2021-12-21 14:50:24,715 INFO L226 Difference]: Without dead ends: 632 [2021-12-21 14:50:24,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:24,717 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 368 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:24,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1476 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:50:24,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-21 14:50:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 575. [2021-12-21 14:50:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 520 states have (on average 1.5134615384615384) internal successors, (787), 524 states have internal predecessors, (787), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-21 14:50:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 869 transitions. [2021-12-21 14:50:24,741 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 869 transitions. Word has length 45 [2021-12-21 14:50:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:24,742 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 869 transitions. [2021-12-21 14:50:24,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 869 transitions. [2021-12-21 14:50:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:50:24,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:24,744 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] [2021-12-21 14:50:24,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:50:24,744 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:24,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:24,745 INFO L85 PathProgramCache]: Analyzing trace with hash 803082110, now seen corresponding path program 1 times [2021-12-21 14:50:24,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:24,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933539347] [2021-12-21 14:50:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:24,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:50:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:24,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933539347] [2021-12-21 14:50:24,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933539347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:24,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:24,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:24,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111252312] [2021-12-21 14:50:24,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:24,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:24,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:24,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:24,827 INFO L87 Difference]: Start difference. First operand 575 states and 869 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:24,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:24,971 INFO L93 Difference]: Finished difference Result 983 states and 1428 transitions. [2021-12-21 14:50:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:24,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:50:24,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:24,976 INFO L225 Difference]: With dead ends: 983 [2021-12-21 14:50:24,976 INFO L226 Difference]: Without dead ends: 792 [2021-12-21 14:50:24,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:24,982 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 953 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:24,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1124 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:24,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-12-21 14:50:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 740. [2021-12-21 14:50:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 666 states have (on average 1.466966966966967) internal successors, (977), 673 states have internal predecessors, (977), 50 states have call successors, (50), 21 states have call predecessors, (50), 22 states have return successors, (60), 46 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-21 14:50:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1087 transitions. [2021-12-21 14:50:25,020 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1087 transitions. Word has length 45 [2021-12-21 14:50:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:25,020 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1087 transitions. [2021-12-21 14:50:25,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1087 transitions. [2021-12-21 14:50:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 14:50:25,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:25,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:25,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:50:25,023 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1436949354, now seen corresponding path program 1 times [2021-12-21 14:50:25,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:25,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259868314] [2021-12-21 14:50:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:25,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 14:50:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:50:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 14:50:25,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:25,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259868314] [2021-12-21 14:50:25,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259868314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:25,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:25,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:25,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581692733] [2021-12-21 14:50:25,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:25,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:25,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:25,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:25,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:25,095 INFO L87 Difference]: Start difference. First operand 740 states and 1087 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:25,459 INFO L93 Difference]: Finished difference Result 1324 states and 1872 transitions. [2021-12-21 14:50:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-21 14:50:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:25,463 INFO L225 Difference]: With dead ends: 1324 [2021-12-21 14:50:25,463 INFO L226 Difference]: Without dead ends: 968 [2021-12-21 14:50:25,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:25,465 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 352 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:25,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1503 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:50:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-12-21 14:50:25,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 930. [2021-12-21 14:50:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 832 states have (on average 1.4146634615384615) internal successors, (1177), 841 states have internal predecessors, (1177), 64 states have call successors, (64), 29 states have call predecessors, (64), 32 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-21 14:50:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1325 transitions. [2021-12-21 14:50:25,491 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1325 transitions. Word has length 62 [2021-12-21 14:50:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:25,491 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1325 transitions. [2021-12-21 14:50:25,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1325 transitions. [2021-12-21 14:50:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 14:50:25,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:25,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:25,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:50:25,494 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:25,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1474560009, now seen corresponding path program 1 times [2021-12-21 14:50:25,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:25,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529032025] [2021-12-21 14:50:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:25,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:50:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 14:50:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:50:25,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:25,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529032025] [2021-12-21 14:50:25,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529032025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:25,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:25,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:25,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869945543] [2021-12-21 14:50:25,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:25,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:25,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:25,547 INFO L87 Difference]: Start difference. First operand 930 states and 1325 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:50:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:25,684 INFO L93 Difference]: Finished difference Result 1583 states and 2178 transitions. [2021-12-21 14:50:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-21 14:50:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:25,689 INFO L225 Difference]: With dead ends: 1583 [2021-12-21 14:50:25,689 INFO L226 Difference]: Without dead ends: 1129 [2021-12-21 14:50:25,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:25,690 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 940 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:25,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 1121 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:25,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-12-21 14:50:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1074. [2021-12-21 14:50:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 960 states have (on average 1.3833333333333333) internal successors, (1328), 971 states have internal predecessors, (1328), 72 states have call successors, (72), 35 states have call predecessors, (72), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-21 14:50:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1498 transitions. [2021-12-21 14:50:25,718 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1498 transitions. Word has length 67 [2021-12-21 14:50:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:25,718 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 1498 transitions. [2021-12-21 14:50:25,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:50:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1498 transitions. [2021-12-21 14:50:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:50:25,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:25,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:25,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:50:25,720 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash 132320028, now seen corresponding path program 1 times [2021-12-21 14:50:25,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:25,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579098566] [2021-12-21 14:50:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:25,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:50:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:50:25,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:25,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579098566] [2021-12-21 14:50:25,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579098566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:25,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768865069] [2021-12-21 14:50:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:25,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:25,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:25,816 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) [2021-12-21 14:50:25,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:50:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 14:50:25,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:26,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:50:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:26,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768865069] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:26,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 14:50:26,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-21 14:50:26,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266742487] [2021-12-21 14:50:26,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:26,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:26,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:26,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:50:26,258 INFO L87 Difference]: Start difference. First operand 1074 states and 1498 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:26,377 INFO L93 Difference]: Finished difference Result 1130 states and 1566 transitions. [2021-12-21 14:50:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 14:50:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-21 14:50:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:26,381 INFO L225 Difference]: With dead ends: 1130 [2021-12-21 14:50:26,381 INFO L226 Difference]: Without dead ends: 1127 [2021-12-21 14:50:26,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:50:26,382 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 1259 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:26,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1259 Valid, 780 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:26,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-12-21 14:50:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1073. [2021-12-21 14:50:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 960 states have (on average 1.38125) internal successors, (1326), 970 states have internal predecessors, (1326), 71 states have call successors, (71), 35 states have call predecessors, (71), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-21 14:50:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1495 transitions. [2021-12-21 14:50:26,425 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1495 transitions. Word has length 68 [2021-12-21 14:50:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:26,426 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1495 transitions. [2021-12-21 14:50:26,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1495 transitions. [2021-12-21 14:50:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:50:26,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:26,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:26,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 14:50:26,644 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,SelfDestructingSolverStorable5 [2021-12-21 14:50:26,644 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:26,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:26,645 INFO L85 PathProgramCache]: Analyzing trace with hash -194439590, now seen corresponding path program 1 times [2021-12-21 14:50:26,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:26,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337296061] [2021-12-21 14:50:26,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:26,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:50:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:50:26,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:26,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337296061] [2021-12-21 14:50:26,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337296061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552698337] [2021-12-21 14:50:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:26,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:26,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:26,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:50:26,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:50:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 14:50:26,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:27,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:50:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:27,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552698337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:50:27,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:50:27,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-21 14:50:27,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061482802] [2021-12-21 14:50:27,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:50:27,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 14:50:27,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:27,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 14:50:27,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:27,216 INFO L87 Difference]: Start difference. First operand 1073 states and 1495 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:50:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:28,412 INFO L93 Difference]: Finished difference Result 2773 states and 3715 transitions. [2021-12-21 14:50:28,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 14:50:28,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-21 14:50:28,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:28,419 INFO L225 Difference]: With dead ends: 2773 [2021-12-21 14:50:28,419 INFO L226 Difference]: Without dead ends: 2229 [2021-12-21 14:50:28,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 14:50:28,421 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 1905 mSDsluCounter, 3006 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1938 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:28,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1938 Valid, 3824 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:50:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-12-21 14:50:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1462. [2021-12-21 14:50:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1310 states have (on average 1.3435114503816794) internal successors, (1760), 1328 states have internal predecessors, (1760), 91 states have call successors, (91), 49 states have call predecessors, (91), 59 states have return successors, (132), 85 states have call predecessors, (132), 90 states have call successors, (132) [2021-12-21 14:50:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1983 transitions. [2021-12-21 14:50:28,473 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1983 transitions. Word has length 69 [2021-12-21 14:50:28,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:28,473 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 1983 transitions. [2021-12-21 14:50:28,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:50:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1983 transitions. [2021-12-21 14:50:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 14:50:28,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:28,476 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 14:50:28,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 14:50:28,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-21 14:50:28,692 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:28,693 INFO L85 PathProgramCache]: Analyzing trace with hash -939873926, now seen corresponding path program 1 times [2021-12-21 14:50:28,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:28,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350187194] [2021-12-21 14:50:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:28,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:28,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:28,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:28,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:50:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:28,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 14:50:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 14:50:28,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:28,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350187194] [2021-12-21 14:50:28,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350187194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:28,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640460170] [2021-12-21 14:50:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:28,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:28,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:28,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:50:28,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 14:50:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:28,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:50:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:28,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:50:28,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640460170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:28,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:50:28,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:50:28,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612040855] [2021-12-21 14:50:28,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:28,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:50:28,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:28,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:50:28,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:28,979 INFO L87 Difference]: Start difference. First operand 1462 states and 1983 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:50:29,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:29,034 INFO L93 Difference]: Finished difference Result 2185 states and 2921 transitions. [2021-12-21 14:50:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:50:29,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-21 14:50:29,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:29,038 INFO L225 Difference]: With dead ends: 2185 [2021-12-21 14:50:29,038 INFO L226 Difference]: Without dead ends: 1340 [2021-12-21 14:50:29,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:29,041 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 648 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 794 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 [2021-12-21 14:50:29,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 794 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:50:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-12-21 14:50:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1325. [2021-12-21 14:50:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1189 states have (on average 1.3473507148864592) internal successors, (1602), 1206 states have internal predecessors, (1602), 83 states have call successors, (83), 43 states have call predecessors, (83), 51 states have return successors, (118), 76 states have call predecessors, (118), 82 states have call successors, (118) [2021-12-21 14:50:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1803 transitions. [2021-12-21 14:50:29,079 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1803 transitions. Word has length 88 [2021-12-21 14:50:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:29,079 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 1803 transitions. [2021-12-21 14:50:29,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:50:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1803 transitions. [2021-12-21 14:50:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 14:50:29,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:29,081 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:29,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 14:50:29,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:29,298 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:29,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1556491019, now seen corresponding path program 1 times [2021-12-21 14:50:29,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:29,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739002273] [2021-12-21 14:50:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:29,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 14:50:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 14:50:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 14:50:29,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:29,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739002273] [2021-12-21 14:50:29,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739002273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703812247] [2021-12-21 14:50:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:29,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:29,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:29,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:50:29,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 14:50:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:50:29,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:50:29,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:50:29,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703812247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:29,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:50:29,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:50:29,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192243122] [2021-12-21 14:50:29,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:29,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:50:29,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:50:29,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:29,594 INFO L87 Difference]: Start difference. First operand 1325 states and 1803 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:50:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:29,632 INFO L93 Difference]: Finished difference Result 1704 states and 2271 transitions. [2021-12-21 14:50:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:50:29,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-21 14:50:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:29,634 INFO L225 Difference]: With dead ends: 1704 [2021-12-21 14:50:29,634 INFO L226 Difference]: Without dead ends: 378 [2021-12-21 14:50:29,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:29,638 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 62 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:29,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1396 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:50:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-21 14:50:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-12-21 14:50:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5768115942028986) internal successors, (544), 346 states have internal predecessors, (544), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-21 14:50:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 596 transitions. [2021-12-21 14:50:29,646 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 596 transitions. Word has length 103 [2021-12-21 14:50:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:29,646 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 596 transitions. [2021-12-21 14:50:29,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:50:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 596 transitions. [2021-12-21 14:50:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:29,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:29,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:29,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 14:50:29,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:29,864 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:29,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1582396628, now seen corresponding path program 1 times [2021-12-21 14:50:29,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:29,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643344598] [2021-12-21 14:50:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:29,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:29,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:29,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643344598] [2021-12-21 14:50:29,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643344598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:29,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:29,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:50:29,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648406874] [2021-12-21 14:50:29,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:29,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:50:29,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:29,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:50:29,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:29,973 INFO L87 Difference]: Start difference. First operand 378 states and 596 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:31,024 INFO L93 Difference]: Finished difference Result 891 states and 1428 transitions. [2021-12-21 14:50:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:50:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:31,027 INFO L225 Difference]: With dead ends: 891 [2021-12-21 14:50:31,027 INFO L226 Difference]: Without dead ends: 520 [2021-12-21 14:50:31,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:50:31,029 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 1030 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:31,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 1069 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:50:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-21 14:50:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 378. [2021-12-21 14:50:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5739130434782609) internal successors, (543), 346 states have internal predecessors, (543), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-21 14:50:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 595 transitions. [2021-12-21 14:50:31,061 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 595 transitions. Word has length 178 [2021-12-21 14:50:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:31,062 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 595 transitions. [2021-12-21 14:50:31,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 595 transitions. [2021-12-21 14:50:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:31,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:31,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:31,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:50:31,064 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:31,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:31,064 INFO L85 PathProgramCache]: Analyzing trace with hash -79298322, now seen corresponding path program 1 times [2021-12-21 14:50:31,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:31,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548844776] [2021-12-21 14:50:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:31,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:31,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:31,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548844776] [2021-12-21 14:50:31,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548844776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:31,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:31,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:50:31,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048775849] [2021-12-21 14:50:31,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:31,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:50:31,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:31,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:50:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:31,168 INFO L87 Difference]: Start difference. First operand 378 states and 595 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:32,256 INFO L93 Difference]: Finished difference Result 883 states and 1411 transitions. [2021-12-21 14:50:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:50:32,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:32,259 INFO L225 Difference]: With dead ends: 883 [2021-12-21 14:50:32,259 INFO L226 Difference]: Without dead ends: 520 [2021-12-21 14:50:32,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:50:32,260 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 1021 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:32,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1045 Valid, 1067 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:50:32,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-21 14:50:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 378. [2021-12-21 14:50:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5710144927536231) internal successors, (542), 346 states have internal predecessors, (542), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-21 14:50:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 594 transitions. [2021-12-21 14:50:32,280 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 594 transitions. Word has length 178 [2021-12-21 14:50:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:32,281 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 594 transitions. [2021-12-21 14:50:32,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 594 transitions. [2021-12-21 14:50:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:32,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:32,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:32,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:50:32,283 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:32,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:32,284 INFO L85 PathProgramCache]: Analyzing trace with hash -649570128, now seen corresponding path program 1 times [2021-12-21 14:50:32,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:32,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315835199] [2021-12-21 14:50:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:32,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:32,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:32,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:32,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:32,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:32,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:32,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:32,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315835199] [2021-12-21 14:50:32,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315835199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:32,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:32,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:50:32,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202131123] [2021-12-21 14:50:32,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:32,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:50:32,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:50:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:50:32,416 INFO L87 Difference]: Start difference. First operand 378 states and 594 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:34,601 INFO L93 Difference]: Finished difference Result 1394 states and 2241 transitions. [2021-12-21 14:50:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:50:34,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:34,605 INFO L225 Difference]: With dead ends: 1394 [2021-12-21 14:50:34,606 INFO L226 Difference]: Without dead ends: 1037 [2021-12-21 14:50:34,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:34,607 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 1552 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:34,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1571 Valid, 1869 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-21 14:50:34,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-12-21 14:50:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 754. [2021-12-21 14:50:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.5844155844155845) internal successors, (1098), 695 states have internal predecessors, (1098), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-21 14:50:34,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1195 transitions. [2021-12-21 14:50:34,642 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1195 transitions. Word has length 178 [2021-12-21 14:50:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:34,642 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1195 transitions. [2021-12-21 14:50:34,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1195 transitions. [2021-12-21 14:50:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:34,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:34,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:34,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:50:34,644 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1525555404, now seen corresponding path program 1 times [2021-12-21 14:50:34,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:34,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803397606] [2021-12-21 14:50:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:34,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:34,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803397606] [2021-12-21 14:50:34,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803397606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:34,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:34,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:34,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020764634] [2021-12-21 14:50:34,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:34,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:34,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:34,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:34,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:34,780 INFO L87 Difference]: Start difference. First operand 754 states and 1195 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:37,519 INFO L93 Difference]: Finished difference Result 2307 states and 3715 transitions. [2021-12-21 14:50:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:37,524 INFO L225 Difference]: With dead ends: 2307 [2021-12-21 14:50:37,525 INFO L226 Difference]: Without dead ends: 1574 [2021-12-21 14:50:37,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:37,527 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 1586 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 3059 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 2947 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:37,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 2947 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3059 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 14:50:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-12-21 14:50:37,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1103. [2021-12-21 14:50:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1014 states have (on average 1.5779092702169626) internal successors, (1600), 1017 states have internal predecessors, (1600), 68 states have call successors, (68), 18 states have call predecessors, (68), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-21 14:50:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1741 transitions. [2021-12-21 14:50:37,582 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1741 transitions. Word has length 178 [2021-12-21 14:50:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:37,583 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1741 transitions. [2021-12-21 14:50:37,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1741 transitions. [2021-12-21 14:50:37,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:37,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:37,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:37,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:50:37,585 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:37,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:37,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2136824462, now seen corresponding path program 1 times [2021-12-21 14:50:37,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:37,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419576959] [2021-12-21 14:50:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:37,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:37,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:37,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419576959] [2021-12-21 14:50:37,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419576959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:37,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:37,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:37,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970028583] [2021-12-21 14:50:37,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:37,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:37,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:37,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:37,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:37,711 INFO L87 Difference]: Start difference. First operand 1103 states and 1741 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:39,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:39,161 INFO L93 Difference]: Finished difference Result 2674 states and 4303 transitions. [2021-12-21 14:50:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:39,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:39,168 INFO L225 Difference]: With dead ends: 2674 [2021-12-21 14:50:39,168 INFO L226 Difference]: Without dead ends: 1592 [2021-12-21 14:50:39,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:39,170 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 1118 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:39,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 1577 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:50:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-12-21 14:50:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1103. [2021-12-21 14:50:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1014 states have (on average 1.5749506903353057) internal successors, (1597), 1017 states have internal predecessors, (1597), 68 states have call successors, (68), 18 states have call predecessors, (68), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-21 14:50:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1738 transitions. [2021-12-21 14:50:39,225 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1738 transitions. Word has length 178 [2021-12-21 14:50:39,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:39,226 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1738 transitions. [2021-12-21 14:50:39,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1738 transitions. [2021-12-21 14:50:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:39,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:39,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:39,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:50:39,228 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:39,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:39,228 INFO L85 PathProgramCache]: Analyzing trace with hash -242490576, now seen corresponding path program 1 times [2021-12-21 14:50:39,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:39,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694064070] [2021-12-21 14:50:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:39,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:39,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:39,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694064070] [2021-12-21 14:50:39,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694064070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:39,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:39,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:39,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529975742] [2021-12-21 14:50:39,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:39,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:39,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:39,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:39,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:39,387 INFO L87 Difference]: Start difference. First operand 1103 states and 1738 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:40,590 INFO L93 Difference]: Finished difference Result 2670 states and 4286 transitions. [2021-12-21 14:50:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:40,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:40,595 INFO L225 Difference]: With dead ends: 2670 [2021-12-21 14:50:40,595 INFO L226 Difference]: Without dead ends: 1588 [2021-12-21 14:50:40,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:40,598 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 1282 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:40,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 1379 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:50:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-12-21 14:50:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1103. [2021-12-21 14:50:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1014 states have (on average 1.571992110453649) internal successors, (1594), 1017 states have internal predecessors, (1594), 68 states have call successors, (68), 18 states have call predecessors, (68), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-21 14:50:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1735 transitions. [2021-12-21 14:50:40,668 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1735 transitions. Word has length 178 [2021-12-21 14:50:40,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:40,669 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1735 transitions. [2021-12-21 14:50:40,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1735 transitions. [2021-12-21 14:50:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:40,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:40,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:40,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:50:40,671 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:40,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1204090290, now seen corresponding path program 1 times [2021-12-21 14:50:40,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:40,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460510848] [2021-12-21 14:50:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:40,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:40,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:40,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:40,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:40,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:40,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:40,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:40,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460510848] [2021-12-21 14:50:40,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460510848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:40,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:40,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:40,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429970043] [2021-12-21 14:50:40,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:40,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:40,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:40,793 INFO L87 Difference]: Start difference. First operand 1103 states and 1735 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:43,380 INFO L93 Difference]: Finished difference Result 3644 states and 5825 transitions. [2021-12-21 14:50:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:43,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:43,395 INFO L225 Difference]: With dead ends: 3644 [2021-12-21 14:50:43,395 INFO L226 Difference]: Without dead ends: 2562 [2021-12-21 14:50:43,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:43,398 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1670 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:43,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 2035 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2685 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 14:50:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-12-21 14:50:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1811. [2021-12-21 14:50:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1666 states have (on average 1.5660264105642256) internal successors, (2609), 1671 states have internal predecessors, (2609), 110 states have call successors, (110), 30 states have call predecessors, (110), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-21 14:50:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2842 transitions. [2021-12-21 14:50:43,517 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2842 transitions. Word has length 178 [2021-12-21 14:50:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:43,517 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2842 transitions. [2021-12-21 14:50:43,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2842 transitions. [2021-12-21 14:50:43,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:43,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:43,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:43,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:50:43,519 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash 280922864, now seen corresponding path program 1 times [2021-12-21 14:50:43,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:43,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249273731] [2021-12-21 14:50:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:43,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:43,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:43,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249273731] [2021-12-21 14:50:43,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249273731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:43,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:43,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:43,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127685665] [2021-12-21 14:50:43,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:43,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:43,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:43,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:43,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:43,627 INFO L87 Difference]: Start difference. First operand 1811 states and 2842 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:45,042 INFO L93 Difference]: Finished difference Result 4340 states and 6921 transitions. [2021-12-21 14:50:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:45,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:45,050 INFO L225 Difference]: With dead ends: 4340 [2021-12-21 14:50:45,050 INFO L226 Difference]: Without dead ends: 2550 [2021-12-21 14:50:45,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:45,054 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 1115 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:45,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 1566 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:50:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-12-21 14:50:45,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1811. [2021-12-21 14:50:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1666 states have (on average 1.5630252100840336) internal successors, (2604), 1671 states have internal predecessors, (2604), 110 states have call successors, (110), 30 states have call predecessors, (110), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-21 14:50:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2837 transitions. [2021-12-21 14:50:45,186 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2837 transitions. Word has length 178 [2021-12-21 14:50:45,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:45,186 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2837 transitions. [2021-12-21 14:50:45,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2837 transitions. [2021-12-21 14:50:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:45,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:45,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:45,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:50:45,188 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:45,188 INFO L85 PathProgramCache]: Analyzing trace with hash 666785266, now seen corresponding path program 1 times [2021-12-21 14:50:45,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:45,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793805433] [2021-12-21 14:50:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:45,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:45,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:45,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793805433] [2021-12-21 14:50:45,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793805433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:45,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:45,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:45,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076915906] [2021-12-21 14:50:45,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:45,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:45,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:45,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:45,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:45,336 INFO L87 Difference]: Start difference. First operand 1811 states and 2837 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:48,204 INFO L93 Difference]: Finished difference Result 6232 states and 9892 transitions. [2021-12-21 14:50:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:48,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:48,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:48,220 INFO L225 Difference]: With dead ends: 6232 [2021-12-21 14:50:48,221 INFO L226 Difference]: Without dead ends: 4442 [2021-12-21 14:50:48,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:48,225 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 1558 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2987 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 3069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:48,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1577 Valid, 2908 Invalid, 3069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2987 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 14:50:48,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4442 states. [2021-12-21 14:50:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4442 to 3229. [2021-12-21 14:50:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 2972 states have (on average 1.557200538358008) internal successors, (4628), 2981 states have internal predecessors, (4628), 194 states have call successors, (194), 54 states have call predecessors, (194), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-21 14:50:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 5051 transitions. [2021-12-21 14:50:48,449 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 5051 transitions. Word has length 178 [2021-12-21 14:50:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:48,449 INFO L470 AbstractCegarLoop]: Abstraction has 3229 states and 5051 transitions. [2021-12-21 14:50:48,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 5051 transitions. [2021-12-21 14:50:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:48,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:48,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:48,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:50:48,451 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:48,452 INFO L85 PathProgramCache]: Analyzing trace with hash 402137776, now seen corresponding path program 1 times [2021-12-21 14:50:48,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:48,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583634697] [2021-12-21 14:50:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:48,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:48,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:48,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583634697] [2021-12-21 14:50:48,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583634697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:48,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:48,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:48,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016094788] [2021-12-21 14:50:48,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:48,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:48,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:48,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:48,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:48,546 INFO L87 Difference]: Start difference. First operand 3229 states and 5051 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:50,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:50,030 INFO L93 Difference]: Finished difference Result 7672 states and 12176 transitions. [2021-12-21 14:50:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:50,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:50,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:50,041 INFO L225 Difference]: With dead ends: 7672 [2021-12-21 14:50:50,041 INFO L226 Difference]: Without dead ends: 4464 [2021-12-21 14:50:50,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:50,047 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 1280 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:50,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 1365 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:50:50,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2021-12-21 14:50:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 3229. [2021-12-21 14:50:50,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 2972 states have (on average 1.554172274562584) internal successors, (4619), 2981 states have internal predecessors, (4619), 194 states have call successors, (194), 54 states have call predecessors, (194), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-21 14:50:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 5042 transitions. [2021-12-21 14:50:50,294 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 5042 transitions. Word has length 178 [2021-12-21 14:50:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:50,294 INFO L470 AbstractCegarLoop]: Abstraction has 3229 states and 5042 transitions. [2021-12-21 14:50:50,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 5042 transitions. [2021-12-21 14:50:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:50,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:50,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:50,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:50:50,297 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1961703886, now seen corresponding path program 1 times [2021-12-21 14:50:50,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:50,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328122254] [2021-12-21 14:50:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:50,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:50,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:50,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328122254] [2021-12-21 14:50:50,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328122254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:50,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:50,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:50,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3084788] [2021-12-21 14:50:50,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:50,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:50,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:50,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:50,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:50,425 INFO L87 Difference]: Start difference. First operand 3229 states and 5042 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:53,634 INFO L93 Difference]: Finished difference Result 11406 states and 18020 transitions. [2021-12-21 14:50:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:53,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:53,655 INFO L225 Difference]: With dead ends: 11406 [2021-12-21 14:50:53,655 INFO L226 Difference]: Without dead ends: 8198 [2021-12-21 14:50:53,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:53,663 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 1553 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2957 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 2895 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:53,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1572 Valid, 2895 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2957 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 14:50:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8198 states. [2021-12-21 14:50:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8198 to 6079. [2021-12-21 14:50:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6079 states, 5598 states have (on average 1.549660593068953) internal successors, (8675), 5615 states have internal predecessors, (8675), 362 states have call successors, (362), 102 states have call predecessors, (362), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-21 14:50:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6079 states to 6079 states and 9496 transitions. [2021-12-21 14:50:54,162 INFO L78 Accepts]: Start accepts. Automaton has 6079 states and 9496 transitions. Word has length 178 [2021-12-21 14:50:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:54,162 INFO L470 AbstractCegarLoop]: Abstraction has 6079 states and 9496 transitions. [2021-12-21 14:50:54,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6079 states and 9496 transitions. [2021-12-21 14:50:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:54,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:54,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:54,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:50:54,169 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:54,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1010084464, now seen corresponding path program 1 times [2021-12-21 14:50:54,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:54,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782579684] [2021-12-21 14:50:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:54,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:54,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:54,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782579684] [2021-12-21 14:50:54,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782579684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:54,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:54,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:54,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197592004] [2021-12-21 14:50:54,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:54,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:54,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:54,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:54,307 INFO L87 Difference]: Start difference. First operand 6079 states and 9496 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:56,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:56,358 INFO L93 Difference]: Finished difference Result 14318 states and 22667 transitions. [2021-12-21 14:50:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:56,359 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:50:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:56,384 INFO L225 Difference]: With dead ends: 14318 [2021-12-21 14:50:56,385 INFO L226 Difference]: Without dead ends: 8260 [2021-12-21 14:50:56,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:56,400 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 1114 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:56,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 1548 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:50:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-12-21 14:50:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 6079. [2021-12-21 14:50:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6079 states, 5598 states have (on average 1.5466237942122187) internal successors, (8658), 5615 states have internal predecessors, (8658), 362 states have call successors, (362), 102 states have call predecessors, (362), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-21 14:50:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6079 states to 6079 states and 9479 transitions. [2021-12-21 14:50:56,907 INFO L78 Accepts]: Start accepts. Automaton has 6079 states and 9479 transitions. Word has length 178 [2021-12-21 14:50:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:56,907 INFO L470 AbstractCegarLoop]: Abstraction has 6079 states and 9479 transitions. [2021-12-21 14:50:56,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:56,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6079 states and 9479 transitions. [2021-12-21 14:50:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:50:56,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:56,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:56,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:50:56,911 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:56,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:56,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1348372014, now seen corresponding path program 1 times [2021-12-21 14:50:56,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:56,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104791007] [2021-12-21 14:50:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:56,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:56,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:56,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:57,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:57,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:57,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:57,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:57,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104791007] [2021-12-21 14:50:57,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104791007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:57,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:57,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:57,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526401098] [2021-12-21 14:50:57,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:57,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:57,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:57,039 INFO L87 Difference]: Start difference. First operand 6079 states and 9479 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:01,181 INFO L93 Difference]: Finished difference Result 21738 states and 34260 transitions. [2021-12-21 14:51:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:51:01,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:51:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:01,217 INFO L225 Difference]: With dead ends: 21738 [2021-12-21 14:51:01,218 INFO L226 Difference]: Without dead ends: 15680 [2021-12-21 14:51:01,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:51:01,231 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 1541 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2920 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 2880 SdHoareTripleChecker+Invalid, 3005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:01,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 2880 Invalid, 3005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2920 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 14:51:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15680 states. [2021-12-21 14:51:02,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15680 to 11826. [2021-12-21 14:51:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11826 states, 10897 states have (on average 1.5439111682114344) internal successors, (16824), 10930 states have internal predecessors, (16824), 698 states have call successors, (698), 198 states have call predecessors, (698), 230 states have return successors, (973), 729 states have call predecessors, (973), 698 states have call successors, (973) [2021-12-21 14:51:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11826 states to 11826 states and 18495 transitions. [2021-12-21 14:51:02,329 INFO L78 Accepts]: Start accepts. Automaton has 11826 states and 18495 transitions. Word has length 178 [2021-12-21 14:51:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:02,330 INFO L470 AbstractCegarLoop]: Abstraction has 11826 states and 18495 transitions. [2021-12-21 14:51:02,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 11826 states and 18495 transitions. [2021-12-21 14:51:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:51:02,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:02,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:02,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 14:51:02,336 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:02,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:02,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1774926512, now seen corresponding path program 1 times [2021-12-21 14:51:02,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:02,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620543721] [2021-12-21 14:51:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:02,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:02,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:02,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:02,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:02,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:02,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:02,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:02,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620543721] [2021-12-21 14:51:02,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620543721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:02,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:02,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:02,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512608097] [2021-12-21 14:51:02,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:02,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:02,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:02,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:02,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:02,440 INFO L87 Difference]: Start difference. First operand 11826 states and 18495 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:05,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:05,397 INFO L93 Difference]: Finished difference Result 27648 states and 43810 transitions. [2021-12-21 14:51:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:51:05,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:51:05,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:05,439 INFO L225 Difference]: With dead ends: 27648 [2021-12-21 14:51:05,439 INFO L226 Difference]: Without dead ends: 15843 [2021-12-21 14:51:05,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:51:05,460 INFO L933 BasicCegarLoop]: 582 mSDtfsCounter, 1161 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:05,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 1512 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:51:05,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15843 states. [2021-12-21 14:51:06,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15843 to 11826. [2021-12-21 14:51:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11826 states, 10897 states have (on average 1.5408828117830595) internal successors, (16791), 10930 states have internal predecessors, (16791), 698 states have call successors, (698), 198 states have call predecessors, (698), 230 states have return successors, (973), 729 states have call predecessors, (973), 698 states have call successors, (973) [2021-12-21 14:51:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11826 states to 11826 states and 18462 transitions. [2021-12-21 14:51:06,546 INFO L78 Accepts]: Start accepts. Automaton has 11826 states and 18462 transitions. Word has length 178 [2021-12-21 14:51:06,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:06,546 INFO L470 AbstractCegarLoop]: Abstraction has 11826 states and 18462 transitions. [2021-12-21 14:51:06,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 11826 states and 18462 transitions. [2021-12-21 14:51:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:51:06,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:06,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:06,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 14:51:06,552 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:06,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1234497006, now seen corresponding path program 1 times [2021-12-21 14:51:06,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:06,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272672687] [2021-12-21 14:51:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:06,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:06,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:06,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:06,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:06,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:06,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:06,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:06,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272672687] [2021-12-21 14:51:06,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272672687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:06,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:06,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:06,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220187649] [2021-12-21 14:51:06,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:06,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:06,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:06,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:06,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:06,678 INFO L87 Difference]: Start difference. First operand 11826 states and 18462 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:14,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:14,364 INFO L93 Difference]: Finished difference Result 47721 states and 75080 transitions. [2021-12-21 14:51:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:51:14,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-21 14:51:14,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:14,459 INFO L225 Difference]: With dead ends: 47721 [2021-12-21 14:51:14,459 INFO L226 Difference]: Without dead ends: 35916 [2021-12-21 14:51:14,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:51:14,488 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 1979 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 2885 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 2855 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:14,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2011 Valid, 2855 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2885 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 14:51:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35916 states. [2021-12-21 14:51:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35916 to 23124. [2021-12-21 14:51:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23124 states, 21331 states have (on average 1.539684027940556) internal successors, (32843), 21396 states have internal predecessors, (32843), 1338 states have call successors, (1338), 390 states have call predecessors, (1338), 454 states have return successors, (2131), 1401 states have call predecessors, (2131), 1338 states have call successors, (2131) [2021-12-21 14:51:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23124 states to 23124 states and 36312 transitions. [2021-12-21 14:51:16,881 INFO L78 Accepts]: Start accepts. Automaton has 23124 states and 36312 transitions. Word has length 178 [2021-12-21 14:51:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:16,882 INFO L470 AbstractCegarLoop]: Abstraction has 23124 states and 36312 transitions. [2021-12-21 14:51:16,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 23124 states and 36312 transitions. [2021-12-21 14:51:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-21 14:51:16,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:16,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:16,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 14:51:16,891 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:16,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1078516464, now seen corresponding path program 1 times [2021-12-21 14:51:16,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:16,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809378245] [2021-12-21 14:51:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:16,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:16,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:16,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:16,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:16,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:16,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:16,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:16,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809378245] [2021-12-21 14:51:16,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809378245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:16,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:16,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:16,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293383243] [2021-12-21 14:51:16,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:16,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:16,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:16,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:16,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:16,985 INFO L87 Difference]: Start difference. First operand 23124 states and 36312 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)