./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.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 67128d109acca52d0fda3c2f0434d60ee9cc5cc865496b6446183c0a601e748c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:31:01,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:31:01,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:31:01,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:31:01,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:31:01,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:31:01,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:31:01,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:31:01,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:31:01,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:31:01,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:31:01,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:31:01,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:31:01,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:31:01,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:31:01,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:31:01,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:31:01,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:31:01,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:31:01,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:31:01,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:31:01,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:31:01,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:31:01,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:31:01,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:31:01,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:31:01,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:31:01,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:31:01,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:31:01,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:31:01,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:31:01,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:31:01,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:31:01,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:31:01,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:31:01,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:31:01,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:31:01,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:31:01,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:31:01,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:31:01,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:31:01,431 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:31:01,449 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:31:01,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:31:01,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:31:01,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:31:01,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:31:01,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:31:01,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:31:01,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:31:01,451 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:31:01,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:31:01,452 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:31:01,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:31:01,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:31:01,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:31:01,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:31:01,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:31:01,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:31:01,453 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:31:01,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:31:01,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:31:01,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:31:01,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:31:01,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:31:01,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:31:01,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:31:01,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:31:01,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:31:01,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:31:01,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:31:01,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:31:01,455 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:31:01,456 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:31:01,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:31:01,456 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67128d109acca52d0fda3c2f0434d60ee9cc5cc865496b6446183c0a601e748c [2021-12-28 02:31:01,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:31:01,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:31:01,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:31:01,732 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:31:01,732 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:31:01,733 INFO L432 ainManager$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-1.c [2021-12-28 02:31:01,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b928e3963/1331cac996b348eaba70576e0629c875/FLAGb6e3d2476 [2021-12-28 02:31:02,286 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:31:02,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c [2021-12-28 02:31:02,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b928e3963/1331cac996b348eaba70576e0629c875/FLAGb6e3d2476 [2021-12-28 02:31:02,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b928e3963/1331cac996b348eaba70576e0629c875 [2021-12-28 02:31:02,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:31:02,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:31:02,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:31:02,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:31:02,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:31:02,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:31:02" (1/1) ... [2021-12-28 02:31:02,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5af25747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:02, skipping insertion in model container [2021-12-28 02:31:02,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:31:02" (1/1) ... [2021-12-28 02:31:02,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:31:02,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:31:03,007 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-1.c[913,926] [2021-12-28 02:31:03,040 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-1.c[5977,5990] [2021-12-28 02:31:03,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:31:03,201 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:31:03,211 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-1.c[913,926] [2021-12-28 02:31:03,244 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-1.c[5977,5990] [2021-12-28 02:31:03,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:31:03,292 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:31:03,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03 WrapperNode [2021-12-28 02:31:03,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:31:03,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:31:03,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:31:03,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:31:03,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03" (1/1) ... [2021-12-28 02:31:03,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03" (1/1) ... [2021-12-28 02:31:03,368 INFO L137 Inliner]: procedures = 72, calls = 85, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1060 [2021-12-28 02:31:03,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:31:03,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:31:03,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:31:03,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:31:03,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03" (1/1) ... [2021-12-28 02:31:03,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03" (1/1) ... [2021-12-28 02:31:03,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03" (1/1) ... [2021-12-28 02:31:03,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03" (1/1) ... [2021-12-28 02:31:03,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03" (1/1) ... [2021-12-28 02:31:03,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03" (1/1) ... [2021-12-28 02:31:03,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03" (1/1) ... [2021-12-28 02:31:03,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:31:03,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:31:03,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:31:03,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:31:03,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03" (1/1) ... [2021-12-28 02:31:03,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:31:03,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:03,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 02:31:03,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 02:31:03,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:31:03,511 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:31:03,511 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:31:03,511 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-28 02:31:03,511 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-28 02:31:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:31:03,513 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:31:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:31:03,513 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:31:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:31:03,514 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:31:03,514 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:31:03,514 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:31:03,514 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:31:03,515 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:31:03,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:31:03,515 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:31:03,515 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:31:03,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:31:03,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:31:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:31:03,516 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:31:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-28 02:31:03,516 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-28 02:31:03,670 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:31:03,671 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:31:04,356 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:31:04,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:31:04,368 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-28 02:31:04,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:31:04 BoogieIcfgContainer [2021-12-28 02:31:04,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:31:04,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:31:04,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:31:04,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:31:04,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:31:02" (1/3) ... [2021-12-28 02:31:04,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452b5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:31:04, skipping insertion in model container [2021-12-28 02:31:04,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:03" (2/3) ... [2021-12-28 02:31:04,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452b5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:31:04, skipping insertion in model container [2021-12-28 02:31:04,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:31:04" (3/3) ... [2021-12-28 02:31:04,377 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.12.cil-1.c [2021-12-28 02:31:04,381 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:31:04,381 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:31:04,425 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:31:04,431 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 02:31:04,431 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:31:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 462 states, 415 states have (on average 1.653012048192771) internal successors, (686), 422 states have internal predecessors, (686), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-28 02:31:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 02:31:04,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:04,462 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] [2021-12-28 02:31:04,462 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:04,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:04,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1035123780, now seen corresponding path program 1 times [2021-12-28 02:31:04,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:04,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786631475] [2021-12-28 02:31:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:04,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:04,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:04,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 02:31:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:04,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:04,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786631475] [2021-12-28 02:31:04,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786631475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:04,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:04,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:31:04,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147562662] [2021-12-28 02:31:04,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:04,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:31:04,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:04,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:31:04,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:31:04,812 INFO L87 Difference]: Start difference. First operand has 462 states, 415 states have (on average 1.653012048192771) internal successors, (686), 422 states have internal predecessors, (686), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) 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) [2021-12-28 02:31:05,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:05,135 INFO L93 Difference]: Finished difference Result 968 states and 1576 transitions. [2021-12-28 02:31:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:31:05,138 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 [2021-12-28 02:31:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:05,162 INFO L225 Difference]: With dead ends: 968 [2021-12-28 02:31:05,162 INFO L226 Difference]: Without dead ends: 521 [2021-12-28 02:31:05,170 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 [2021-12-28 02:31:05,173 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 957 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:05,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1141 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:31:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-28 02:31:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 515. [2021-12-28 02:31:05,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 464 states have (on average 1.5366379310344827) internal successors, (713), 469 states have internal predecessors, (713), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-28 02:31:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 791 transitions. [2021-12-28 02:31:05,267 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 791 transitions. Word has length 44 [2021-12-28 02:31:05,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:05,268 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 791 transitions. [2021-12-28 02:31:05,268 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) [2021-12-28 02:31:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 791 transitions. [2021-12-28 02:31:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 02:31:05,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:05,271 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] [2021-12-28 02:31:05,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:31:05,272 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:05,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:05,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1381906941, now seen corresponding path program 1 times [2021-12-28 02:31:05,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:05,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422703344] [2021-12-28 02:31:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:05,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:05,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:05,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 02:31:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:05,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:05,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422703344] [2021-12-28 02:31:05,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422703344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:05,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:05,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:31:05,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021465602] [2021-12-28 02:31:05,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:05,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:31:05,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:05,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:31:05,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:31:05,339 INFO L87 Difference]: Start difference. First operand 515 states and 791 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) [2021-12-28 02:31:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:05,855 INFO L93 Difference]: Finished difference Result 763 states and 1131 transitions. [2021-12-28 02:31:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:31:05,860 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 [2021-12-28 02:31:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:05,864 INFO L225 Difference]: With dead ends: 763 [2021-12-28 02:31:05,864 INFO L226 Difference]: Without dead ends: 639 [2021-12-28 02:31:05,867 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 [2021-12-28 02:31:05,869 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 369 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:05,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1480 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:31:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-12-28 02:31:05,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 582. [2021-12-28 02:31:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 525 states have (on average 1.5180952380952382) internal successors, (797), 530 states have internal predecessors, (797), 41 states have call successors, (41), 15 states have call predecessors, (41), 14 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-28 02:31:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 881 transitions. [2021-12-28 02:31:05,925 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 881 transitions. Word has length 45 [2021-12-28 02:31:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:05,925 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 881 transitions. [2021-12-28 02:31:05,925 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) [2021-12-28 02:31:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 881 transitions. [2021-12-28 02:31:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 02:31:05,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:05,934 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] [2021-12-28 02:31:05,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:31:05,934 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:05,935 INFO L85 PathProgramCache]: Analyzing trace with hash 97549480, now seen corresponding path program 1 times [2021-12-28 02:31:05,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:05,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110276118] [2021-12-28 02:31:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:05,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:05,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:05,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 02:31:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:05,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:06,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110276118] [2021-12-28 02:31:06,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110276118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:06,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:06,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:31:06,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620118307] [2021-12-28 02:31:06,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:06,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:31:06,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:06,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:31:06,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:31:06,002 INFO L87 Difference]: Start difference. First operand 582 states and 881 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) [2021-12-28 02:31:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:06,165 INFO L93 Difference]: Finished difference Result 990 states and 1440 transitions. [2021-12-28 02:31:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:31:06,165 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 [2021-12-28 02:31:06,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:06,170 INFO L225 Difference]: With dead ends: 990 [2021-12-28 02:31:06,170 INFO L226 Difference]: Without dead ends: 799 [2021-12-28 02:31:06,173 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 [2021-12-28 02:31:06,177 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 966 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:06,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 1143 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:31:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-12-28 02:31:06,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 747. [2021-12-28 02:31:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 671 states have (on average 1.4709388971684054) internal successors, (987), 679 states have internal predecessors, (987), 52 states have call successors, (52), 22 states have call predecessors, (52), 22 states have return successors, (60), 46 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-28 02:31:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1099 transitions. [2021-12-28 02:31:06,219 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1099 transitions. Word has length 45 [2021-12-28 02:31:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:06,220 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1099 transitions. [2021-12-28 02:31:06,220 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) [2021-12-28 02:31:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1099 transitions. [2021-12-28 02:31:06,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-28 02:31:06,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:06,222 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] [2021-12-28 02:31:06,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:31:06,222 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:06,223 INFO L85 PathProgramCache]: Analyzing trace with hash -438152140, now seen corresponding path program 1 times [2021-12-28 02:31:06,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:06,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850596705] [2021-12-28 02:31:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:06,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:06,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:06,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 02:31:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:06,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 02:31:06,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:06,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850596705] [2021-12-28 02:31:06,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850596705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:06,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:06,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:31:06,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052391513] [2021-12-28 02:31:06,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:06,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:31:06,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:06,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:31:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:31:06,317 INFO L87 Difference]: Start difference. First operand 747 states and 1099 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) [2021-12-28 02:31:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:06,726 INFO L93 Difference]: Finished difference Result 1331 states and 1884 transitions. [2021-12-28 02:31:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:31:06,726 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 [2021-12-28 02:31:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:06,731 INFO L225 Difference]: With dead ends: 1331 [2021-12-28 02:31:06,731 INFO L226 Difference]: Without dead ends: 975 [2021-12-28 02:31:06,732 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 [2021-12-28 02:31:06,733 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 353 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:06,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1535 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:31:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-28 02:31:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 937. [2021-12-28 02:31:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 837 states have (on average 1.4181600955794504) internal successors, (1187), 847 states have internal predecessors, (1187), 66 states have call successors, (66), 30 states have call predecessors, (66), 32 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-28 02:31:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1337 transitions. [2021-12-28 02:31:06,766 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1337 transitions. Word has length 62 [2021-12-28 02:31:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:06,766 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1337 transitions. [2021-12-28 02:31:06,766 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) [2021-12-28 02:31:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1337 transitions. [2021-12-28 02:31:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 02:31:06,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:06,769 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] [2021-12-28 02:31:06,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:31:06,769 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -865322860, now seen corresponding path program 1 times [2021-12-28 02:31:06,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:06,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337291550] [2021-12-28 02:31:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:06,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:06,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:06,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:31:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:06,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 02:31:06,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:06,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337291550] [2021-12-28 02:31:06,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337291550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:06,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:06,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:31:06,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756839847] [2021-12-28 02:31:06,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:06,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:31:06,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:06,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:31:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:31:06,820 INFO L87 Difference]: Start difference. First operand 937 states and 1337 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) [2021-12-28 02:31:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:06,991 INFO L93 Difference]: Finished difference Result 1590 states and 2190 transitions. [2021-12-28 02:31:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:31:06,992 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 [2021-12-28 02:31:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:06,997 INFO L225 Difference]: With dead ends: 1590 [2021-12-28 02:31:06,997 INFO L226 Difference]: Without dead ends: 1136 [2021-12-28 02:31:06,998 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 [2021-12-28 02:31:06,999 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 953 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:06,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1140 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:31:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-12-28 02:31:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1081. [2021-12-28 02:31:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 965 states have (on average 1.3865284974093264) internal successors, (1338), 977 states have internal predecessors, (1338), 74 states have call successors, (74), 36 states have call predecessors, (74), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-28 02:31:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1510 transitions. [2021-12-28 02:31:07,039 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1510 transitions. Word has length 67 [2021-12-28 02:31:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:07,039 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1510 transitions. [2021-12-28 02:31:07,040 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) [2021-12-28 02:31:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1510 transitions. [2021-12-28 02:31:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:31:07,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:07,042 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] [2021-12-28 02:31:07,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:31:07,042 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash 679042809, now seen corresponding path program 1 times [2021-12-28 02:31:07,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:07,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140588039] [2021-12-28 02:31:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:07,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:07,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:07,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:31:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:07,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:31:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:31:07,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:07,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140588039] [2021-12-28 02:31:07,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140588039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:07,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014865379] [2021-12-28 02:31:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:07,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:07,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:07,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:31:07,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:31:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:07,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 02:31:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:07,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:31:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 02:31:07,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014865379] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:07,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:31:07,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-28 02:31:07,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752038266] [2021-12-28 02:31:07,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:07,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:31:07,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:31:07,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:07,658 INFO L87 Difference]: Start difference. First operand 1081 states and 1510 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) [2021-12-28 02:31:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:07,805 INFO L93 Difference]: Finished difference Result 1137 states and 1578 transitions. [2021-12-28 02:31:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 02:31:07,805 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 [2021-12-28 02:31:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:07,811 INFO L225 Difference]: With dead ends: 1137 [2021-12-28 02:31:07,811 INFO L226 Difference]: Without dead ends: 1134 [2021-12-28 02:31:07,818 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 [2021-12-28 02:31:07,822 INFO L933 BasicCegarLoop]: 725 mSDtfsCounter, 1279 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:07,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1279 Valid, 792 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:31:07,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-12-28 02:31:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1080. [2021-12-28 02:31:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 965 states have (on average 1.3844559585492229) internal successors, (1336), 976 states have internal predecessors, (1336), 73 states have call successors, (73), 36 states have call predecessors, (73), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-28 02:31:07,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1507 transitions. [2021-12-28 02:31:07,870 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1507 transitions. Word has length 68 [2021-12-28 02:31:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:07,871 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1507 transitions. [2021-12-28 02:31:07,872 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) [2021-12-28 02:31:07,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1507 transitions. [2021-12-28 02:31:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:31:07,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:07,874 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] [2021-12-28 02:31:07,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 02:31:08,087 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 [2021-12-28 02:31:08,088 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash -425930313, now seen corresponding path program 1 times [2021-12-28 02:31:08,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:08,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652042942] [2021-12-28 02:31:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:08,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:08,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:08,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:31:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:08,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:31:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:31:08,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652042942] [2021-12-28 02:31:08,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652042942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18659054] [2021-12-28 02:31:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:08,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:08,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:08,177 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) [2021-12-28 02:31:08,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:31:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:08,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 02:31:08,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:08,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:31:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 02:31:08,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18659054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:31:08,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:31:08,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-28 02:31:08,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385347314] [2021-12-28 02:31:08,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:31:08,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 02:31:08,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 02:31:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:08,777 INFO L87 Difference]: Start difference. First operand 1080 states and 1507 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) [2021-12-28 02:31:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:10,513 INFO L93 Difference]: Finished difference Result 2780 states and 3727 transitions. [2021-12-28 02:31:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-28 02:31:10,514 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 [2021-12-28 02:31:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:10,522 INFO L225 Difference]: With dead ends: 2780 [2021-12-28 02:31:10,523 INFO L226 Difference]: Without dead ends: 2236 [2021-12-28 02:31:10,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-28 02:31:10,525 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 1278 mSDsluCounter, 3520 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 4350 SdHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:10,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 4350 Invalid, 2413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2366 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:31:10,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-12-28 02:31:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1469. [2021-12-28 02:31:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1315 states have (on average 1.3460076045627376) internal successors, (1770), 1334 states have internal predecessors, (1770), 93 states have call successors, (93), 50 states have call predecessors, (93), 59 states have return successors, (132), 85 states have call predecessors, (132), 90 states have call successors, (132) [2021-12-28 02:31:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1995 transitions. [2021-12-28 02:31:10,629 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1995 transitions. Word has length 69 [2021-12-28 02:31:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:10,630 INFO L470 AbstractCegarLoop]: Abstraction has 1469 states and 1995 transitions. [2021-12-28 02:31:10,630 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) [2021-12-28 02:31:10,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1995 transitions. [2021-12-28 02:31:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-28 02:31:10,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:10,634 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] [2021-12-28 02:31:10,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:31:10,859 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 [2021-12-28 02:31:10,860 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:10,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:10,860 INFO L85 PathProgramCache]: Analyzing trace with hash -711580662, now seen corresponding path program 1 times [2021-12-28 02:31:10,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:10,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038379301] [2021-12-28 02:31:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:10,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:10,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:10,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:31:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:10,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:10,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 02:31:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-28 02:31:10,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:10,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038379301] [2021-12-28 02:31:10,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038379301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:10,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901565354] [2021-12-28 02:31:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:10,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:10,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:10,942 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) [2021-12-28 02:31:10,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:31:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:31:11,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 02:31:11,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:11,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901565354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:11,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:11,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-28 02:31:11,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951412615] [2021-12-28 02:31:11,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:11,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:31:11,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:11,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:31:11,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:11,178 INFO L87 Difference]: Start difference. First operand 1469 states and 1995 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) [2021-12-28 02:31:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:11,252 INFO L93 Difference]: Finished difference Result 2192 states and 2933 transitions. [2021-12-28 02:31:11,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:31:11,253 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 [2021-12-28 02:31:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:11,258 INFO L225 Difference]: With dead ends: 2192 [2021-12-28 02:31:11,258 INFO L226 Difference]: Without dead ends: 1347 [2021-12-28 02:31:11,259 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 [2021-12-28 02:31:11,260 INFO L933 BasicCegarLoop]: 731 mSDtfsCounter, 660 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:11,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 806 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:31:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-12-28 02:31:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1332. [2021-12-28 02:31:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1194 states have (on average 1.3500837520938023) internal successors, (1612), 1212 states have internal predecessors, (1612), 85 states have call successors, (85), 44 states have call predecessors, (85), 51 states have return successors, (118), 76 states have call predecessors, (118), 82 states have call successors, (118) [2021-12-28 02:31:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1815 transitions. [2021-12-28 02:31:11,312 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1815 transitions. Word has length 88 [2021-12-28 02:31:11,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:11,312 INFO L470 AbstractCegarLoop]: Abstraction has 1332 states and 1815 transitions. [2021-12-28 02:31:11,312 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) [2021-12-28 02:31:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1815 transitions. [2021-12-28 02:31:11,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 02:31:11,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:11,315 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] [2021-12-28 02:31:11,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:31:11,538 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 [2021-12-28 02:31:11,539 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash -237141579, now seen corresponding path program 1 times [2021-12-28 02:31:11,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:11,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283533758] [2021-12-28 02:31:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:11,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:31:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 02:31:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-28 02:31:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 02:31:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-28 02:31:11,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:11,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283533758] [2021-12-28 02:31:11,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283533758] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:11,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059089160] [2021-12-28 02:31:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:11,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:11,630 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) [2021-12-28 02:31:11,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 02:31:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:31:11,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 02:31:11,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:11,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059089160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:11,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:11,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-28 02:31:11,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146644445] [2021-12-28 02:31:11,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:11,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:31:11,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:11,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:31:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:11,887 INFO L87 Difference]: Start difference. First operand 1332 states and 1815 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) [2021-12-28 02:31:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:11,934 INFO L93 Difference]: Finished difference Result 1711 states and 2283 transitions. [2021-12-28 02:31:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:31:11,934 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 [2021-12-28 02:31:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:11,936 INFO L225 Difference]: With dead ends: 1711 [2021-12-28 02:31:11,937 INFO L226 Difference]: Without dead ends: 385 [2021-12-28 02:31:11,938 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 [2021-12-28 02:31:11,940 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 62 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1420 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 [2021-12-28 02:31:11,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1420 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:31:11,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-12-28 02:31:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-12-28 02:31:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 350 states have (on average 1.582857142857143) internal successors, (554), 352 states have internal predecessors, (554), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-28 02:31:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 608 transitions. [2021-12-28 02:31:11,951 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 608 transitions. Word has length 103 [2021-12-28 02:31:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:11,952 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 608 transitions. [2021-12-28 02:31:11,952 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) [2021-12-28 02:31:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 608 transitions. [2021-12-28 02:31:11,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:11,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:11,956 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, 1] [2021-12-28 02:31:11,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 02:31:12,171 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 [2021-12-28 02:31:12,172 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1921252372, now seen corresponding path program 1 times [2021-12-28 02:31:12,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:12,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570884685] [2021-12-28 02:31:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:12,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:12,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:12,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:12,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:12,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:12,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:12,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:12,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570884685] [2021-12-28 02:31:12,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570884685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:12,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:12,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:31:12,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788800288] [2021-12-28 02:31:12,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:12,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:31:12,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:12,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:31:12,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:31:12,334 INFO L87 Difference]: Start difference. First operand 385 states and 608 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, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:13,615 INFO L93 Difference]: Finished difference Result 905 states and 1452 transitions. [2021-12-28 02:31:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:31:13,616 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, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:13,622 INFO L225 Difference]: With dead ends: 905 [2021-12-28 02:31:13,622 INFO L226 Difference]: Without dead ends: 527 [2021-12-28 02:31:13,624 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 [2021-12-28 02:31:13,626 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 1044 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:13,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1068 Valid, 1079 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:31:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-28 02:31:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 385. [2021-12-28 02:31:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 350 states have (on average 1.58) internal successors, (553), 352 states have internal predecessors, (553), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-28 02:31:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 607 transitions. [2021-12-28 02:31:13,654 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 607 transitions. Word has length 179 [2021-12-28 02:31:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:13,654 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 607 transitions. [2021-12-28 02:31:13,654 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, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 607 transitions. [2021-12-28 02:31:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:13,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:13,656 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, 1] [2021-12-28 02:31:13,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:31:13,657 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:13,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1272659602, now seen corresponding path program 1 times [2021-12-28 02:31:13,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:13,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537149142] [2021-12-28 02:31:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:13,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:13,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:13,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537149142] [2021-12-28 02:31:13,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537149142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:13,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:13,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:31:13,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859778768] [2021-12-28 02:31:13,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:13,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:31:13,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:13,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:31:13,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:31:13,804 INFO L87 Difference]: Start difference. First operand 385 states and 607 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, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:15,021 INFO L93 Difference]: Finished difference Result 897 states and 1435 transitions. [2021-12-28 02:31:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:31:15,022 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, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:15,028 INFO L225 Difference]: With dead ends: 897 [2021-12-28 02:31:15,028 INFO L226 Difference]: Without dead ends: 527 [2021-12-28 02:31:15,030 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 [2021-12-28 02:31:15,030 INFO L933 BasicCegarLoop]: 668 mSDtfsCounter, 1035 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:15,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 1077 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:31:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-28 02:31:15,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 385. [2021-12-28 02:31:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 350 states have (on average 1.5771428571428572) internal successors, (552), 352 states have internal predecessors, (552), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-28 02:31:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 606 transitions. [2021-12-28 02:31:15,073 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 606 transitions. Word has length 179 [2021-12-28 02:31:15,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:15,074 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 606 transitions. [2021-12-28 02:31:15,074 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, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:15,074 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 606 transitions. [2021-12-28 02:31:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:15,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:15,076 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, 1] [2021-12-28 02:31:15,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:31:15,077 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash 774102800, now seen corresponding path program 1 times [2021-12-28 02:31:15,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:15,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353117745] [2021-12-28 02:31:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:15,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:15,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:15,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353117745] [2021-12-28 02:31:15,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353117745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:15,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:15,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:31:15,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496263045] [2021-12-28 02:31:15,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:15,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:31:15,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:31:15,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:31:15,249 INFO L87 Difference]: Start difference. First operand 385 states and 606 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:17,673 INFO L93 Difference]: Finished difference Result 1415 states and 2277 transitions. [2021-12-28 02:31:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:31:17,674 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:17,679 INFO L225 Difference]: With dead ends: 1415 [2021-12-28 02:31:17,679 INFO L226 Difference]: Without dead ends: 1051 [2021-12-28 02:31:17,680 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 [2021-12-28 02:31:17,680 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 1568 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:17,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1587 Valid, 1703 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-28 02:31:17,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-12-28 02:31:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 766. [2021-12-28 02:31:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 703 states have (on average 1.5903271692745378) internal successors, (1118), 706 states have internal predecessors, (1118), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-28 02:31:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1217 transitions. [2021-12-28 02:31:17,730 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1217 transitions. Word has length 179 [2021-12-28 02:31:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:17,731 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1217 transitions. [2021-12-28 02:31:17,731 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1217 transitions. [2021-12-28 02:31:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:17,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:17,733 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, 1] [2021-12-28 02:31:17,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:31:17,733 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:17,734 INFO L85 PathProgramCache]: Analyzing trace with hash -611636980, now seen corresponding path program 1 times [2021-12-28 02:31:17,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:17,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380009295] [2021-12-28 02:31:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:17,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:17,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:17,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380009295] [2021-12-28 02:31:17,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380009295] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:17,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:17,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:17,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47580394] [2021-12-28 02:31:17,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:17,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:17,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:17,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:17,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:17,875 INFO L87 Difference]: Start difference. First operand 766 states and 1217 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:20,942 INFO L93 Difference]: Finished difference Result 2338 states and 3771 transitions. [2021-12-28 02:31:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:20,942 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:20,949 INFO L225 Difference]: With dead ends: 2338 [2021-12-28 02:31:20,949 INFO L226 Difference]: Without dead ends: 1593 [2021-12-28 02:31:20,952 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 [2021-12-28 02:31:20,952 INFO L933 BasicCegarLoop]: 1033 mSDtfsCounter, 1595 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 3144 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1614 SdHoareTripleChecker+Valid, 2989 SdHoareTripleChecker+Invalid, 3223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:20,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1614 Valid, 2989 Invalid, 3223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3144 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-28 02:31:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-12-28 02:31:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1120. [2021-12-28 02:31:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1029 states have (on average 1.5840621963070942) internal successors, (1630), 1033 states have internal predecessors, (1630), 70 states have call successors, (70), 19 states have call predecessors, (70), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-28 02:31:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1773 transitions. [2021-12-28 02:31:21,056 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1773 transitions. Word has length 179 [2021-12-28 02:31:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:21,057 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1773 transitions. [2021-12-28 02:31:21,057 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1773 transitions. [2021-12-28 02:31:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:21,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:21,059 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, 1] [2021-12-28 02:31:21,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:31:21,059 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:21,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:21,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1913858702, now seen corresponding path program 1 times [2021-12-28 02:31:21,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:21,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094409028] [2021-12-28 02:31:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:21,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:21,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:21,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094409028] [2021-12-28 02:31:21,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094409028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:21,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:21,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:21,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053459893] [2021-12-28 02:31:21,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:21,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:21,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:21,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:21,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:21,215 INFO L87 Difference]: Start difference. First operand 1120 states and 1773 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:24,303 INFO L93 Difference]: Finished difference Result 3699 states and 5955 transitions. [2021-12-28 02:31:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:24,305 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:24,314 INFO L225 Difference]: With dead ends: 3699 [2021-12-28 02:31:24,315 INFO L226 Difference]: Without dead ends: 2600 [2021-12-28 02:31:24,317 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 [2021-12-28 02:31:24,318 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 1592 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 3146 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 3228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:24,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1611 Valid, 2981 Invalid, 3228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3146 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-28 02:31:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-12-28 02:31:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1829. [2021-12-28 02:31:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1682 states have (on average 1.5784780023781213) internal successors, (2655), 1688 states have internal predecessors, (2655), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-28 02:31:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2890 transitions. [2021-12-28 02:31:24,452 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2890 transitions. Word has length 179 [2021-12-28 02:31:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:24,452 INFO L470 AbstractCegarLoop]: Abstraction has 1829 states and 2890 transitions. [2021-12-28 02:31:24,452 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2890 transitions. [2021-12-28 02:31:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:24,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:24,455 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, 1] [2021-12-28 02:31:24,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:31:24,455 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1302589644, now seen corresponding path program 1 times [2021-12-28 02:31:24,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:24,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741671222] [2021-12-28 02:31:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:24,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:24,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:24,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741671222] [2021-12-28 02:31:24,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741671222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:24,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:24,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:24,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766448656] [2021-12-28 02:31:24,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:24,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:24,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:24,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:24,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:24,598 INFO L87 Difference]: Start difference. First operand 1829 states and 2890 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:26,137 INFO L93 Difference]: Finished difference Result 4396 states and 7063 transitions. [2021-12-28 02:31:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:26,137 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:26,147 INFO L225 Difference]: With dead ends: 4396 [2021-12-28 02:31:26,147 INFO L226 Difference]: Without dead ends: 2588 [2021-12-28 02:31:26,151 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 [2021-12-28 02:31:26,152 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 1132 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:26,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 1625 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:31:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-12-28 02:31:26,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1829. [2021-12-28 02:31:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1682 states have (on average 1.5755053507728893) internal successors, (2650), 1688 states have internal predecessors, (2650), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-28 02:31:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2885 transitions. [2021-12-28 02:31:26,307 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2885 transitions. Word has length 179 [2021-12-28 02:31:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:26,308 INFO L470 AbstractCegarLoop]: Abstraction has 1829 states and 2885 transitions. [2021-12-28 02:31:26,308 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2885 transitions. [2021-12-28 02:31:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:26,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:26,311 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, 1] [2021-12-28 02:31:26,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:31:26,311 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:26,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:26,311 INFO L85 PathProgramCache]: Analyzing trace with hash -102602034, now seen corresponding path program 1 times [2021-12-28 02:31:26,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:26,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909485226] [2021-12-28 02:31:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:26,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:26,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:26,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909485226] [2021-12-28 02:31:26,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909485226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:26,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:26,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:26,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877522328] [2021-12-28 02:31:26,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:26,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:26,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:26,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:26,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:26,449 INFO L87 Difference]: Start difference. First operand 1829 states and 2885 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:28,052 INFO L93 Difference]: Finished difference Result 4390 states and 7037 transitions. [2021-12-28 02:31:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:28,053 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:28,062 INFO L225 Difference]: With dead ends: 4390 [2021-12-28 02:31:28,062 INFO L226 Difference]: Without dead ends: 2582 [2021-12-28 02:31:28,066 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 [2021-12-28 02:31:28,066 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 1132 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:28,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 1619 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:31:28,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-12-28 02:31:28,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 1829. [2021-12-28 02:31:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1682 states have (on average 1.5725326991676576) internal successors, (2645), 1688 states have internal predecessors, (2645), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-28 02:31:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2880 transitions. [2021-12-28 02:31:28,221 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2880 transitions. Word has length 179 [2021-12-28 02:31:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:28,221 INFO L470 AbstractCegarLoop]: Abstraction has 1829 states and 2880 transitions. [2021-12-28 02:31:28,222 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2880 transitions. [2021-12-28 02:31:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:28,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:28,225 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, 1] [2021-12-28 02:31:28,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:31:28,226 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:28,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1791731852, now seen corresponding path program 1 times [2021-12-28 02:31:28,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:28,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586724808] [2021-12-28 02:31:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:28,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:28,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:28,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:28,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:28,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:28,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:28,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:28,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586724808] [2021-12-28 02:31:28,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586724808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:28,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:28,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:28,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079805548] [2021-12-28 02:31:28,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:28,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:28,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:28,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:28,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:28,385 INFO L87 Difference]: Start difference. First operand 1829 states and 2880 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:29,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:29,675 INFO L93 Difference]: Finished difference Result 4378 states and 6999 transitions. [2021-12-28 02:31:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:29,675 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:29,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:29,683 INFO L225 Difference]: With dead ends: 4378 [2021-12-28 02:31:29,683 INFO L226 Difference]: Without dead ends: 2570 [2021-12-28 02:31:29,687 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 [2021-12-28 02:31:29,687 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 1374 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:29,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1394 Valid, 1370 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:31:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-12-28 02:31:29,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1829. [2021-12-28 02:31:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1682 states have (on average 1.5695600475624256) internal successors, (2640), 1688 states have internal predecessors, (2640), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-28 02:31:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2875 transitions. [2021-12-28 02:31:29,847 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2875 transitions. Word has length 179 [2021-12-28 02:31:29,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:29,847 INFO L470 AbstractCegarLoop]: Abstraction has 1829 states and 2875 transitions. [2021-12-28 02:31:29,847 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2875 transitions. [2021-12-28 02:31:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:29,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:29,849 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, 1] [2021-12-28 02:31:29,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:31:29,849 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash 868564426, now seen corresponding path program 1 times [2021-12-28 02:31:29,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:29,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635328674] [2021-12-28 02:31:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:29,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:29,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:29,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635328674] [2021-12-28 02:31:29,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635328674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:29,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:29,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:29,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362264452] [2021-12-28 02:31:29,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:29,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:29,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:29,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:29,992 INFO L87 Difference]: Start difference. First operand 1829 states and 2875 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:32,968 INFO L93 Difference]: Finished difference Result 6291 states and 10012 transitions. [2021-12-28 02:31:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:32,968 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:32,982 INFO L225 Difference]: With dead ends: 6291 [2021-12-28 02:31:32,982 INFO L226 Difference]: Without dead ends: 4483 [2021-12-28 02:31:32,987 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 [2021-12-28 02:31:32,987 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 1567 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 3154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:32,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1586 Valid, 2953 Invalid, 3154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3068 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-28 02:31:32,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4483 states. [2021-12-28 02:31:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4483 to 3266. [2021-12-28 02:31:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3007 states have (on average 1.5643498503491853) internal successors, (4704), 3017 states have internal predecessors, (4704), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-28 02:31:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 5129 transitions. [2021-12-28 02:31:33,303 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 5129 transitions. Word has length 179 [2021-12-28 02:31:33,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:33,303 INFO L470 AbstractCegarLoop]: Abstraction has 3266 states and 5129 transitions. [2021-12-28 02:31:33,304 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 5129 transitions. [2021-12-28 02:31:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:33,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:33,307 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, 1] [2021-12-28 02:31:33,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:31:33,307 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1254426828, now seen corresponding path program 1 times [2021-12-28 02:31:33,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:33,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752551783] [2021-12-28 02:31:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:33,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:33,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:33,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752551783] [2021-12-28 02:31:33,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752551783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:33,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:33,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:33,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887804119] [2021-12-28 02:31:33,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:33,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:33,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:33,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:33,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:33,438 INFO L87 Difference]: Start difference. First operand 3266 states and 5129 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:35,085 INFO L93 Difference]: Finished difference Result 7748 states and 12334 transitions. [2021-12-28 02:31:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:35,086 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:35,102 INFO L225 Difference]: With dead ends: 7748 [2021-12-28 02:31:35,102 INFO L226 Difference]: Without dead ends: 4503 [2021-12-28 02:31:35,110 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 [2021-12-28 02:31:35,111 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 1128 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:35,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 1606 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:31:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2021-12-28 02:31:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 3266. [2021-12-28 02:31:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3007 states have (on average 1.5613568340538744) internal successors, (4695), 3017 states have internal predecessors, (4695), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-28 02:31:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 5120 transitions. [2021-12-28 02:31:35,392 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 5120 transitions. Word has length 179 [2021-12-28 02:31:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:35,392 INFO L470 AbstractCegarLoop]: Abstraction has 3266 states and 5120 transitions. [2021-12-28 02:31:35,392 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 5120 transitions. [2021-12-28 02:31:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:35,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:35,394 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:31:35,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:31:35,395 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash 989779338, now seen corresponding path program 1 times [2021-12-28 02:31:35,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:35,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806343681] [2021-12-28 02:31:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:35,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:35,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:35,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:35,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:35,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:35,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:35,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806343681] [2021-12-28 02:31:35,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806343681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:35,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:35,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:35,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302805317] [2021-12-28 02:31:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:35,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:35,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:35,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:35,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:35,540 INFO L87 Difference]: Start difference. First operand 3266 states and 5120 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:38,866 INFO L93 Difference]: Finished difference Result 11516 states and 18248 transitions. [2021-12-28 02:31:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:38,867 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:38,889 INFO L225 Difference]: With dead ends: 11516 [2021-12-28 02:31:38,889 INFO L226 Difference]: Without dead ends: 8271 [2021-12-28 02:31:38,897 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 [2021-12-28 02:31:38,897 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 1559 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:38,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1578 Valid, 2942 Invalid, 3127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3041 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-28 02:31:38,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8271 states. [2021-12-28 02:31:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8271 to 6148. [2021-12-28 02:31:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 5665 states have (on average 1.5567519858781995) internal successors, (8819), 5683 states have internal predecessors, (8819), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-28 02:31:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 9642 transitions. [2021-12-28 02:31:39,454 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 9642 transitions. Word has length 179 [2021-12-28 02:31:39,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:39,455 INFO L470 AbstractCegarLoop]: Abstraction has 6148 states and 9642 transitions. [2021-12-28 02:31:39,455 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 9642 transitions. [2021-12-28 02:31:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:39,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:39,458 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, 1] [2021-12-28 02:31:39,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:31:39,459 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1374062324, now seen corresponding path program 1 times [2021-12-28 02:31:39,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:39,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129517459] [2021-12-28 02:31:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:39,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:39,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:39,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129517459] [2021-12-28 02:31:39,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129517459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:39,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:39,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:39,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889335545] [2021-12-28 02:31:39,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:39,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:39,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:39,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:39,600 INFO L87 Difference]: Start difference. First operand 6148 states and 9642 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:41,549 INFO L93 Difference]: Finished difference Result 14476 states and 22997 transitions. [2021-12-28 02:31:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:41,550 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:41,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:41,568 INFO L225 Difference]: With dead ends: 14476 [2021-12-28 02:31:41,568 INFO L226 Difference]: Without dead ends: 8349 [2021-12-28 02:31:41,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:41,583 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 1294 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:41,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 1396 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:31:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2021-12-28 02:31:42,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 6148. [2021-12-28 02:31:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 5665 states have (on average 1.5537511032656663) internal successors, (8802), 5683 states have internal predecessors, (8802), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-28 02:31:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 9625 transitions. [2021-12-28 02:31:42,230 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 9625 transitions. Word has length 179 [2021-12-28 02:31:42,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:42,231 INFO L470 AbstractCegarLoop]: Abstraction has 6148 states and 9625 transitions. [2021-12-28 02:31:42,231 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:42,231 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 9625 transitions. [2021-12-28 02:31:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:42,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:42,235 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, 1] [2021-12-28 02:31:42,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 02:31:42,236 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:42,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1597726026, now seen corresponding path program 1 times [2021-12-28 02:31:42,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:42,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378410578] [2021-12-28 02:31:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:42,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:42,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378410578] [2021-12-28 02:31:42,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378410578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:42,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:42,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:42,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484616188] [2021-12-28 02:31:42,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:42,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:42,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:42,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:42,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:42,382 INFO L87 Difference]: Start difference. First operand 6148 states and 9625 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:44,552 INFO L93 Difference]: Finished difference Result 14458 states and 22910 transitions. [2021-12-28 02:31:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:44,552 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:44,578 INFO L225 Difference]: With dead ends: 14458 [2021-12-28 02:31:44,578 INFO L226 Difference]: Without dead ends: 8331 [2021-12-28 02:31:44,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:44,594 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 1292 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:44,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1312 Valid, 1392 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:31:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8331 states. [2021-12-28 02:31:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8331 to 6148. [2021-12-28 02:31:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 5665 states have (on average 1.5507502206531332) internal successors, (8785), 5683 states have internal predecessors, (8785), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-28 02:31:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 9608 transitions. [2021-12-28 02:31:45,190 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 9608 transitions. Word has length 179 [2021-12-28 02:31:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:45,190 INFO L470 AbstractCegarLoop]: Abstraction has 6148 states and 9608 transitions. [2021-12-28 02:31:45,191 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 9608 transitions. [2021-12-28 02:31:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:45,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:45,194 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, 1] [2021-12-28 02:31:45,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 02:31:45,195 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:45,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:45,195 INFO L85 PathProgramCache]: Analyzing trace with hash -800261812, now seen corresponding path program 1 times [2021-12-28 02:31:45,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:45,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226254302] [2021-12-28 02:31:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:45,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:45,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:45,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:45,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:45,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:45,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:45,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:45,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226254302] [2021-12-28 02:31:45,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226254302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:45,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:45,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:45,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086883775] [2021-12-28 02:31:45,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:45,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:45,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:45,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:45,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:45,326 INFO L87 Difference]: Start difference. First operand 6148 states and 9608 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:49,813 INFO L93 Difference]: Finished difference Result 21944 states and 34608 transitions. [2021-12-28 02:31:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:49,814 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:49,855 INFO L225 Difference]: With dead ends: 21944 [2021-12-28 02:31:49,856 INFO L226 Difference]: Without dead ends: 15817 [2021-12-28 02:31:49,872 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 [2021-12-28 02:31:49,873 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 1547 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 2992 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1566 SdHoareTripleChecker+Valid, 2923 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:49,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1566 Valid, 2923 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2992 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-28 02:31:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15817 states. [2021-12-28 02:31:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15817 to 11959. [2021-12-28 02:31:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11959 states, 11028 states have (on average 1.5465179542981502) internal successors, (17055), 11062 states have internal predecessors, (17055), 700 states have call successors, (700), 199 states have call predecessors, (700), 230 states have return successors, (973), 729 states have call predecessors, (973), 698 states have call successors, (973) [2021-12-28 02:31:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11959 states to 11959 states and 18728 transitions. [2021-12-28 02:31:51,010 INFO L78 Accepts]: Start accepts. Automaton has 11959 states and 18728 transitions. Word has length 179 [2021-12-28 02:31:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:51,010 INFO L470 AbstractCegarLoop]: Abstraction has 11959 states and 18728 transitions. [2021-12-28 02:31:51,011 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11959 states and 18728 transitions. [2021-12-28 02:31:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:51,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:51,017 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, 1] [2021-12-28 02:31:51,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 02:31:51,017 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash -461974262, now seen corresponding path program 1 times [2021-12-28 02:31:51,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:51,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563443890] [2021-12-28 02:31:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:51,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:31:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:31:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:51,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:51,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563443890] [2021-12-28 02:31:51,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563443890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:51,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:51,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:51,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650683691] [2021-12-28 02:31:51,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:51,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:51,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:51,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:51,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:51,172 INFO L87 Difference]: Start difference. First operand 11959 states and 18728 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:59,123 INFO L93 Difference]: Finished difference Result 48119 states and 75904 transitions. [2021-12-28 02:31:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:31:59,124 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:31:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:59,246 INFO L225 Difference]: With dead ends: 48119 [2021-12-28 02:31:59,247 INFO L226 Difference]: Without dead ends: 36181 [2021-12-28 02:31:59,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:31:59,293 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 1745 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 3235 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 3362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:59,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1763 Valid, 2237 Invalid, 3362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3235 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-28 02:31:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36181 states.